Bulletin DFOS 103
DESIGN 51
SINGLE WIDTH
AIRFOIL FANS
AN ISO 9001 COMPANY
CHICAGO BLOWER CORPORATION
High Volume
High Efficiency
The heart of Chicago’s Design 51 centrifugal fan
is the airfoil wheel, the most efficient type for
Single Width
Airfoil Fans
clean air applications. This fan has an enviable
reputation for performance and reliability in a
multitude of applications, including industrial
supply or exhaust systems. The Design 51 singlewidth is a rugged fan built to Chicago’s industrial
level of quality and long-term dependability.
Single-width fans are offered in Sizes 135 to
890, with pressures to 20" WG and volumes to
220,000 CFM. Construction flexibility is one of
the strengths of the Design 51, available in
several AMCA arrangements, including 1, 3, 8
and 9 to meet any installation requirement.
Chicago also offers an alternate Design 51RA
fan series especially suited for lower
pressure applications. Performance
of the two designs are compared
on page 6. For special applications or
requirements, contact your Chicago
Blower Sales Engineer, an experienced and
knowledgeable fan specialist who will
help guide you through your requirements for a custom engineered fan.
Chicago Blower Corporation Design 51
Airfoil Fan ratings shown herein are based on
tests and procedures performed in accordance
with AMCA Publication 211.
All Design 51 Airfoil Fans comply with the
recommendations in AMCA Standard 99-2408-69
“operating limits for single width centrifugal fans”
and AMCA Standard 99-2402-82 which details
maximum wheel diameters and outlet areas.
2
CHICAGO BLOWER CORPORATION
DESIGN 51
Airfoil Wheel
Performance
Widely recognized for design
efficiency and integrity, Chicago’s
Design 51 airfoil wheel has ideal
characteristics for variable air
volume systems. With a smooth,
steep pressure curve, major
changes in pressure will cause only
minor changes in volume. The broad
high-efficiency operating range offers extensive
selections and capabilities within each fan size.
The fan’s deep spun inlet and hyperbolic wheel cone
plus generous housing proportions provide a smooth
stable air flow over the entire performance range.
Precision balancing assures quieter vibration-free
operation that adds to the overall reliability and
performance of Chicago’s Design 51 airfoil fans.
Structural Reliability
Rugged wheels of heavy gauge steel and welded construction provide maximum integrity and long service.
Material types and gauges are determined by test
Refer to
Chicago’s
fan.net for
performance,
fan curves and
sound data.
Chicago’s
fan.net
Selection
Program
For software
and assistance,
contact your
local Chicago
Blower Sales
Engineer.
verified finite element analysis. Wheels are fitted with
true hollow airfoil blades with weep holes to prevent
moisture build-up within the blade. All blades are continuously welded. Blades for all Class III and larger Class II
sizes have reinforcing ribs.
Housings are constructed of continuously welded heavy
gauge steel with rigid bearing bases. Stiff bracing is
added to resist any possible distortion caused by
sudden air flow variations. The precision shafts of the
Design 51 fans are made from the finest select, turned,
ground and polished SAE 1040-1045 steel. Heavy-duty
bearings are self-alignable ball or roller type, computer
selected for a minimum of 75,000 hours average life at
maximum class speeds and horsepowers. Bearing life is
extended by extremely close tolerance fits.
3
Performance and
Convenience Options
Inlet Volume Control
The Inlet Volume Control (IVC) provides precise
air control and more efficient performance at
partial loads. Adjustable guide vanes pre-spin
the incoming air in the same rotation as the
wheel to produce the desired volume of air
at the exact pressure. Vanes are mounted
entirely within the inlet cone.The IVC is suitable
for manual or automatic operation.
Shaft Seal
Flanged/
Slip Inlet
The compressed sheet seal mounted between steel
A bolt-on
side shaft opening. Shaft seals are not gas tight.
plates is designed to reduce leakage through the drive
accessory that
facilitates the
Shaft Cooler and Guard
attachment of
Cast aluminum cooling wheel split for installation with
flexible connectors, dampers or
ductwork to the
fan inlet.
guard. Required for temperatures above 300°F.
Housing Drain
A half coupling is welded to the lowest
point of the housing. Available with or
Flanged
Outlet
Continuously welded angle
facilitates the attachment of flexible
without drain plug.
Adjustable Motor Base
Simplifies belt tension adjustments. Base is mounted on
the fan’s base side (A/9) or on a unitary base (A/9H).
connectors, dampers or ductwork to the fan discharge.
Outlet Dampers
Inlet/Outlet Companion Flanges
Structural angle assembly matches fan inlet or outlet
flanges and allows fastening of ductwork for a flange-toflange connection. Needed with flanged inlet or outlet.
Dampers offer an economical alternative to IVCs.
However, they require substantially more horsepower
at reduced air volume. Dampers for all fan classes have
double thickness airfoil blades, and are available with
Inlet Screen
parallel or opposed blade rotating louvres.
Welded steel wire screen mounts within the inlet cone
Dampers have punched flanges on both ends to simplify
or outside the inlet vanes when furnished with Inlet
fan and duct connections. Matching punched flanged
Volume Control.
outlet is required for mounting.
4
CHICAGO BLOWER CORPORATION
DESIGN 51
Unitary Base
Fan and adjustable motor base are welded onto a unitary
base of continuously welded structural steel channel.
Split
Housings
Vibration isolators also available.
To facilitate wheel removal, fan sizes 135 through
(Refer to page 30 for base dimensions.)
660 can be furnished with horizontal split housings.
Sizes 730 to 890 are standard with splits. Splits are
Shaft and Bearing Guard
caulked and bolted when the fan is shipped assem-
The expanded metal guard encloses the shaft and bear-
bled. Traffic routing may require knocked-down
ings from the housing side to just beyond the outboard
shipment. Consult your
bearing. Extended grease fittings are recommended.
Chicago Blower
Engineer.
Belt Guard
Three sides are fully enclosed with expanded metal on
the fourth side for ventilation and visual inspection.
Easily removed for drive servicing.
Access Doors
The flush mounted door features quick-locking
compression clamp. Neoprene gasket to
300°F and asbestos-free gasket to 800°F. Plug
type has a round door raised 4" off the scroll to
provide adequate clearance for insulation. Includes
asbestos-free gasket.
Extended Grease Fittings
Spark Resistant Construction
Fittings allow for external lubrication without removal
AMCA Type C construction substitutes an aluminum
of shaft and bearing guard. Recommended for all
inlet cone and adds a drive side aluminum buffing
continuous operation installations.
tube between the wheel, shaft and housing. Used
when trace amounts of solids are in the airstream.
AMCA Type A and B also available upon request.
Special Paint and Coatings
Numerous paint and corrosion resistant coatings
are available to meet the most stringent applications.
Special materials, such as aluminum or stainless steel,
can be provided for most duties.
5
Selecting Fans at NonStandard Conditions
ALTITUDE (feet) with BAROMETRIC PRESSURE (In. Hg)
AIR
TEMP
(F°)
0´
29.92
500´
29.38
1000´
28.86
1500´
28.33
2000´
27.82
2500´
27.31
3000´
26.82
3500´
26.32
4000´
25.84
5000´
24.90
-15
0
70
.84
.87
1.00
.86
.88
1.02
.87
.90
1.04
.89
.92
1.06
.90
.93
1.08
.92
.95
1.10
.94
.97
1.12
.95
.99
1.14
.97
1.00
1.16
1.01
1.04
1.20
100
150
200
1.06
1.15
1.25
1.08
1.17
1.27
1.10
1.19
1.29
1.12
1.22
1.32
1.14
1.24
1.34
1.16
1.26
1.36
1.18
1.28
1.39
1.20
1.31
1.42
1.22
1.33
1.44
1.27
1.38
1.50
EXAMPLE:
250
300
350
1.34
1.43
1.53
1.36
1.46
1.56
1.39
1.49
1.58
1.41
1.51
1.61
1.44
1.54
1.64
1.47
1.57
1.67
1.49
1.60
1.70
1.52
1.63
1.74
1.55
1.66
1.77
1.61
1.72
1.84
Select a fan to handle 5500 CFM at 2" SP at
400°F and at 2000 feet above sea level.
400
500
600
1.62
1.81
2.00
1.65
1.84
2.04
1.68
1.88
2.07
1.71
1.91
2.11
1.75
1.95
2.15
1.78
1.98
2.19
1.81
2.02
2.23
1.84
2.06
2.27
1.88
2.10
2.32
1.95
2.18
2.40
1. Refer to Table 1. At 2000 feet altitude
and 400° F, the correction factor is 1.75.
650
700
800
2.09
2.19
2.38
2.13
2.23
2.42
2.17
2.27
2.48
2.21
2.31
2.51
2.25
2.35
2.56
2.29
2.40
2.60
2.34
2.44
2.65
2.38
2.49
2.70
2.43
2.53
2.75
2.52
2.63
2.86
Fan capacity tables are based on the fan
handling standard air at 70°F and sea level.
For operating conditions other than these,
correct the HP of the fan and check the
speed derating limits.
2. Corrected SP is 1.75 X 2" = 3.5" SP at
70°F and sea level.
Correction factors for temperature (F) and altitude (above sea level):
standard air = .075 lbs. per cubic foot at sea level, 29.92” Hg barometric pressure and 70° F
3. Using the fan rating tables, selection of
the proper size fan is now based on 5500
CFM at 3.5" SP. These specifications
indicate that one selection available is
the size 222 Class I fan which shows a
performance of 5500 CFM at 3.5" SP,
requiring 4.19 BHP at 1749 RPM.
TABLE II
Maximum RPM at 70°F
4. To correct the BHP, divide 4.19 by 1.75 =
2.39 BHP, which is the corrected BHP at
400°F and 2000 feet altitude.
5. Verify the wheel and shaft maximum
speeds using Table II and Table III.
a. Multiply the class maximum wheel
speed from Table II by the Class I Wheel
Deration Factor from Table III. The wheel
maximum speed @ 400°F is 3225 RPM x
.86 = 2774 RPM. Then multiply the maximum shaft speed from Table II by the
Shaft Deration Factor from Table III. The
shaft maximum speed @ 400°F is 2205
x .98 = 2161. Thus, the maximum allowable fan speed is 2161 RPM.
b. Check the above maximum allowable
fan speed against the selected fan RPM.
Since the fan operating speed of 1749
RPM is within safe limits of the maximum
allowable of 2161 RPM, the size 222
Class I fan will deliver 5500 CFM at 2" SP,
400°F and 2000 feet altitude requiring
2.39 HP.
6
TABLE I Temperature and Altitude Correction
CLASS I
TABLE III
Temperature/
Speed Deration
CLASS II
CLASS III
Temp./ Deration Factors
FAN
SIZE
Max.
Wheel
Max.
Shaft
Max.
Wheel
Max.
Shaft
Max.
Wheel
Max.
Shaft
135
150
165
5288
4657
4083
3542
3246
2886
5288
4657
4083
4607
4221
3753
6207
6134
5408
R/F
R/F
4721
70
100
200
1.00
.99
.93
1.00
1.00
1,00
182
200
222
4071
3592
3225
2653
2355
2205
4071
3592
3225
3437
3063
2868
4778
4216
3786
4323
3853
3607
300
350
400
.89
.88
.86
.99
.98
.98
245
270
300
2852
2638
2359
1991
1809
1663
2852
2638
2359
2590
2353
2163
3347
3096
2768
3258
2959
2720
450
500
550
.84
.82
.81
.97
.97
.96
330
365
402
2089
1885
1703
1433
1318
1141
2089
1885
1703
1863
1715
1483
2452
2213
1999
2344
2157
1866
445
490
542
1145
1027
938
1043
939
858
1493
1312
1228
1360
1224
1120
1709
1558
1418
1706
1535
1404
600
650
700
800
.79
.78
.77
.68
.96
.95
.94
.93
600
660
730
839
776
699
775
695
637
1078
1052
924
1011
906
831
1403
1235
R/F
1268
1136
R/F
807
890
626
564
576
518
809
718
751
675
R/F
R/F
R/F
R/F
Temp. Steel
(F°)
Wheel
Steel
Shaft
Note: For derating max. speeds due to high temperature, not
operational capabilities. R/F: Refer to Factory.
Chicago’s RA Design 51
When working with lower pressure, typically below 5" SP, and space
and initial cost are primary considerations, the alternate Design 51RA
fan in smaller sizes may offer a better selection. The RA fan was
specifically engineered for both improved efficiency and lower
sound levels in low pressure, high volume applications. A typical
comparison of the two designs follows.
EXAMPLE:
Size 300 fan with 15,900 CFM at 1-1/2 " SP, 70°F and sea level.
Standard Design 51 = 1529 RPM at 10.78 BHP
RA Design 51 = 1376 RPM at 8.7 BHP
CHICAGO BLOWER CORPORATION
DESIGN 51
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
13-7/32 In. Wheel Diameter
1.05 Sq. Ft. Outlet Area
Peak BHP = 0.068 (RPM ÷1000) 3
Tip Speed (fpm) = 3.46 x RPM
135
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
3542 RPM
CLASS II 4607 RPM
CLASS III Consult Factory
CFM
OV
FPM
1/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
600
950
1300
1650
571
905
1238
1571
795
1030
1317
1617
0.03
0.07
0.14
0.25
964
1187
1423
1705
0.06
0.11
0.19
0.31
1120
1317
1535
1788
0.09
0.15
0.25
0.38
1268
1423
1652
1872
0.12
0.20
0.31
0.44
1625
1833
2058
0.28
0.42
0.59
1820
1985
2217
0.38
0.53
0.74
2006
2133
2347
0.49
0.65
0.88
2179
2279
2467
0.60
0.78
1.02
2422
2584
0.91
1.17
2561
2700
1.05
1.32
2000
2350
2700
3050
1905
2238
2571
2905
1924
2235
2550
2865
0.41
0.63
0.93
1.31
2000
2301
2608
2918
0.49
0.72
1.03
1.42
2071
2364
2664
2968
0.56
0.81
1.13
1.53
2139
2425
2719
3018
0.64
0.90
1.23
1.65
2278
2542
2823
3113
0.80
1.08
1.44
1.88
2432
2660
2924
3204
0.98
1.27
1.65
2.11
2578
2788
3026
3294
1.16
1.48
1.87
2.35
2701
2920
3134
3384
1.33
1.70
2.10
2.60
2809
3040
3250
3477
1.50
1.91
2.34
2.85
2911
3146
3364
3576
1.68
2.11
2.59
3.12
3400
3750
4100
4450
3238
3571
3905
4238
3183
3501
3820
4139
1.78
2.36
3.06
3.88
3230
3544
3859
4176
1.91
2.5
3.21
4.04
3276
3586
3898
4212
2.03
2.64
3.36
4.21
3321
3628
3937
4248
2.16
2.78
3.51
4.37
3409
3709
4012
4318
2.41
3.06
3.81
4.70
3493
3787
4085
4386
2.67
3.34
4.12
5.03
3575
3863
4156
4452
2.93
3.62
4.43
5.37
3655
3936
4225
4517
3.20
3.91
4.74
5.70
3735
4009
4292
4581
3.47
4.21
5.06
6.04
3817
4082
4359
4644
3.75
4.50
5.38
6.38
4800
5150
5500
5850
4571
4905
5238
5571
4459
4780
5100
5421
4.84
5.95
7.22
8.66
4493
4811
5130
5449
5.02
6.14
7.42
8.88
4527
4843
5160
5477
5.19
6.33
7.62
9.09
4560
4874
5189
5505
5.37
6.52
7.82
9.30
4626
4936
5247
5560
5.72
6.89
8.23
9.73
4690
4996
5304
5613
6.08
7.28
8.63
10.16
4752
5055
5360
5666
6.44
7.66
9.04
10.59
4814
5113
5415
5719
6.80
8.05
9.45
11.03
4874
5170
5469
5770
7.16
8.43
9.86
11.47
4933
5226
5522
7.53
8.82
10.28
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
1500
1850
2200
2550
1429
1762
2095
2429
2877
3022
3231
3465
1.51
1.85
2.29
2.82
3114
3227
3407
3632
1.85
2.22
2.68
3.25
3338
3429
3581
3788
2.20
2.60
3.09
3.69
3626
3754
3940
3.00
3.51
4.15
4001
4094
4240
3.85
4.42
5.10
4423
4537
5.38
6.11
4736
4827
6.39
7.19
5033
5109
2900
3250
3600
3950
2762
3095
3429
3762
3690
3898
4124
4378
3.41
4.05
4.77
5.62
3867
4086
4294
4522
3.92
4.64
5.41
6.29
4021
4253
4467
4677
4.41
5.21
6.07
6.99
4164
4400
4626
4835
4.90
5.77
6.71
7.71
4434
4661
4897
5125
5.92
6.88
7.96
9.13
4699
4903
5133
5368
6.98
8.00
9.18
10.48
4962
5140
5353
5585
8.11
9.18
10.42
11.82
5221
9.28
5376 10.40
5568 11.70
5789 13.18
4300
4650
5000
5350
4095
4429
4762
5095
4648
4927
5211
5501
6.61
7.74
9.01
10.45
4775
5044
5322
5605
7.31
8.47
9.79
11.27
4908
5162
5430
5707
8.03
9.23
10.59
12.11
5048
5284
5540
8.78
10.01
11.39
5337
5546
5770
10.35
11.65
13.08
5598
11.88
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
SIZE
CLASS I
135 RA
13-7/32 In. Wheel Diameter
1.05 Sq. Ft. Outlet Area
Peak BHP = 0.076 (RPM ÷1000) 3
Tip Speed (fpm) = 3.46 x RPM
CLASS I
7.46
8.31
3-1/2" SP
RPM
BHP
18" SP
RPM
BHP
4" SP
RPM
BHP
20" SP
RPM
BHP
5382
9.47
5644 10.68
5476
5609
5781
10.50
11.68
13.03
5726 11.77
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
3542 RPM
CLASS II 4607 RPM
CLASS III Consult Factory
CFM
OV
FPM
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
600
950
1300
1650
571
905
1238
1571
783
1024
1294
1580
0.04
0.07
0.14
0.24
967
1173
1417
1682
0.07
0.12
0.20
0.31
1123
1300
1529
1778
0.10
0.17
0.26
0.39
1264
1418
1630
1868
0.13
0.22
0.32
0.47
1634
1812
2035
0.32
0.45
0.63
1821
1983
2184
0.42
0.60
0.79
1998
2143
2323
0.53
0.74
0.96
2290
2459
0.88
1.14
2427
2589
1.02
1.32
2559
2714
1.15
1.51
2000
2350
2700
3050
1905
2238
2571
2905
1875
2174
2477
2782
0.38
0.58
0.85
1.19
1961
2249
2543
2840
0.47
0.69
0.97
1.32
2043
2321
2606
2898
0.56
0.79
1.09
1.46
2123
2391
2669
2954
0.66
0.90
1.21
1.59
2274
2526
2790
3064
0.85
1.12
1.46
1.87
2413
2654
2907
3170
1.04
1.34
1.71
2.15
2541
2775
3019
3273
1.23
1.57
1.96
2.43
2661
2888
3126
3373
1.43
1.79
2.22
2.72
2777
2996
3228
3470
1.63
2.02
2.48
3.01
2890
3099
3326
3563
1.84
2.25
2.74
3.30
3400
3750
4100
4450
3238
3571
3905
4238
3089
3396
3704
4013
1.61
2.13
2.74
3.47
3141
3444
3748
4054
1.76
2.29
2.92
3.67
3193
3491
3792
4094
1.91
2.45
3.10
3.86
3244
3538
3835
4134
2.06
2.62
3.28
4.05
3344
3630
3919
4213
2.36
2.95
3.64
4.44
3441
3719
4003
4290
2.67
3.29
4.01
4.84
3537
3807
4084
4366
2.98
3.63
4.38
5.24
3630
3894
4165
4441
3.30
3.97
4.75
5.64
3720
3978
4244
4515
3.62
4.32
5.13
6.05
3808
4061
4321
4588
3.94
4.67
5.51
6.46
4800
5150
5500
5850
4571
4905
5238
5571
4323
4633
4943
5253
4.33
5.31
6.43
7.71
4361
4668
4976
5284
4.53
5.53
6.67
7.96
4398
4703
5009
5315
4.74
5.75
6.91
8.21
4435
4738
5041
5346
4.95
5.98
7.14
8.46
4508
4806
5106
5407
5.37
6.42
7.62
8.97
4581
4874
5170
5467
5.79
6.88
8.11
9.48
4652
4941
5233
5527
6.22
7.34
8.59
10.00
4722
5007
5295
5586
6.65
7.80
9.08
10.52
4792
5072
5357
5645
7.09
8.26
9.57
11.04
4860 7.53
5137 8.73
5418 10.07
5703 11.56
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
1500
1850
2200
2550
1429
1762
2095
2429
2879
3037
3211
3416
1.67
2.11
2.53
3.02
3103
3244
3410
3596
2.00
2.52
3.02
3.54
3438
3598
3771
2.90
3.52
4.10
3623
3776
3942
3.29
4.01
4.67
4104
4263
4.92
5.82
4414
4558
5.85
6.91
4834
7.97
5100
9.04
5362
10.19
2900
3250
3600
3950
2762
3095
3429
3762
3641
3874
4115
4364
3.61
4.28
5.03
5.88
3809
4036
4271
4512
4.18
4.90
5.72
6.63
3970
4189
4419
4655
4.76
5.54
6.41
7.38
4127
4336
4560
4792
5.36
6.18
7.11
8.15
4432
4618
4827
5050
6.64
7.51
8.53
9.68
4720
4892
5081
5292
7.96
8.94
10.00
11.23
4990
5154
5330
5524
9.24
10.41
11.57
12.84
5243
5404
5572
5752
10.45
11.88
13.19
14.54
5485
5641
11.65
13.29
4300
4650
5000
5350
4095
4429
4762
5095
4619
4881
5149
5421
6.83
7.91
9.11
10.45
4761
5016
5276
5542
7.64
8.78
10.04
11.43
4897
5146
5401
5661
8.46
9.65
10.97
12.42
5029
5273
5522
5777
9.28
10.53
11.91
13.42
5280
5515
5756
10.94
12.31
13.81
5514
5744
12.61
14.11
5736
14.30
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
5719 12.87
Power ratings (BHP) do not include drive losses.
7
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
14-9/16 In. Wheel Diameter
1.29 Sq. Ft. Outlet Area
Peak BHP = 0.110 (RPM ÷1000) 3
Tip Speed (fpm) = 3.81 x RPM
150
SIZE
3246 RPM
CLASS II 4221 RPM
CLASS III Consult Factory
CFM
OV
FPM
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
700
1150
1600
2050
543
891
1240
1589
707
933
1209
1497
0.04
0.09
0.18
0.32
863
1075
1304
1576
0.07
0.14
0.24
0.40
1010
1193
1403
1650
0.11
0.19
0.31
0.48
1147
1290
1509
1724
0.15
0.24
0.38
0.56
1473
1674
1888
0.34
0.52
0.74
1651
1812
2034
0.46
0.65
0.93
1820
1944
2154
0.59
0.80
1.10
1977
2075
2262
0.73
0.96
1.28
2203
2366
1.12
1.46
2329
2469
1.29
1.65
2500
2950
3400
3850
1938
2287
2636
2984
1793
2093
2395
2699
0.54
0.84
1.24
1.77
1860
2151
2446
2745
0.63
0.95
1.37
1.91
1923
2207
2496
2789
0.73
1.06
1.50
2.05
1984
2260
2544
2833
0.82
1.17
1.62
2.19
2105
2363
2636
2917
1.02
1.40
1.88
2.48
2239
2466
2725
2997
1.24
1.64
2.15
2.78
2372
2575
2814
3076
1.47
1.89
2.42
3.08
2486
2692
2906
3154
1.69
2.16
2.70
3.39
2586
2803
3004
3233
1.90
2.43
3.01
3.70
2677
2902
3105
3316
2.11
2.69
3.32
4.03
4300
4750
5200
5650
3333
3682
4031
4380
3004
3310
3617
3924
2.42
3.23
4.20
5.35
3045
3348
3651
3956
2.58
3.40
4.39
5.56
3086
3385
3685
3987
2.74
3.58
4.58
5.76
3125
3421
3719
4018
2.90
3.75
4.77
5.97
3202
3492
3784
4079
3.22
4.11
5.15
6.39
3277
3561
3848
4139
3.55
4.46
5.54
6.81
3348
3627
3911
4197
3.87
4.82
5.94
7.23
3419
3692
3971
4254
4.21
5.19
6.33
7.66
3488
3756
4031
4310
4.55
5.55
6.73
8.08
3559
3819
4089
4366
4.90
5.93
7.13
8.52
6100
6550
7000
7450
4729
5078
5426
5775
4231
4539
4847
5156
6.70
8.25
10.04
12.07
4261
4567
4873
5180
6.92
8.49
10.29
12.34
4290
4594
4899
5204
7.14
8.73
10.55
12.61
4319
4622
4925
5229
7.36
8.97
10.80
12.88
4376
4675
4975
5276
7.81
9.45
11.31
13.42
4432
4728
5025
8.26
9.93
11.83
4487
4779
5073
8.72
10.42
12.35
4541
4830
5121
9.18
10.91
12.87
4594
4880
5169
9.64
11.40
13.39
4646 10.10
4929 11.90
5215 13.92
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
1900
2350
2800
3250
1473
1822
2171
2519
2630
2784
2996
3221
1.90
2.37
2.96
3.67
2840
2963
3151
3374
2.32
2.81
3.45
4.23
3041
3140
3303
3513
2.76
3.29
3.95
4.78
3232
3314
3453
3647
3.21
3.78
4.48
5.34
3648
3751
3907
4.83
5.59
6.52
3961
4041
4166
5.94
6.78
7.78
4320
4420
8.04
9.10
4586
4669
9.35
10.49
4841
4912
10.71
11.93
3700
4150
4600
5050
2868
3217
3566
3915
3427
3632
3863
4117
4.45
5.31
6.32
7.51
3595
3797
4004
4238
5.11
6.06
7.11
8.33
3739
3954
4154
4365
5.75
6.81
7.94
9.20
3869
4093
4300
4500
6.38
7.54
8.78
10.10
4109
4333
4557
4767
7.65
8.95
10.40
11.94
4339
4548
4773
4997
8.97
10.37
11.97
13.72
4567
4754
4971
5197
10.36
11.83
13.54
15.44
4793
4958
5159
11.81
13.35
15.13
5016
5161
13.32
14.92
5500
5950
6400
6850
4264
4612
4961
5310
4383
4655
4932
5213
8.89
10.46
12.25
14.26
4492
4756
5027
5303
9.76
11.39
13.23
15.30
4603
4857
5121
10.66
12.34
14.23
4718
4959
5215
11.59
13.31
15.25
4965
5175
13.56
15.34
5207
15.56
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
8
CLASS I
150 RA
14-9/16 In. Wheel Diameter
1.29 Sq. Ft. Outlet Area
Peak BHP = 0.124 (RPM ÷1000) 3
Tip Speed (fpm) = 3.81 x RPM
CLASS I
5146
13.42
5236
14.89
3246 RPM
CLASS II 4221 RPM
CLASS III Consult Factory
CFM
OV
FPM
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
700
1150
1600
2050
543
891
1240
1589
697
928
1187
1463
0.04
0.09
0.17
0.31
868
1063
1297
1553
0.08
0.15
0.25
0.40
1010
1178
1398
1639
0.12
0.20
0.32
0.49
1286
1490
1720
0.26
0.40
0.59
1482
1654
1869
0.39
0.56
0.79
1652
1808
2004
0.51
0.73
0.99
1813
1953
2129
0.64
0.91
1.19
2086
2250
1.09
1.41
2210
2367
1.26
1.64
2329
2479
1.42
1.87
2500
2950
3400
3850
1938
2287
2636
2984
1746
2035
2326
2619
0.50
0.77
1.13
1.60
1822
2100
2384
2671
0.61
0.90
1.28
1.77
1895
2164
2440
2721
0.73
1.03
1.43
1.94
1966
2226
2495
2770
0.84
1.17
1.59
2.11
2101
2346
2602
2866
1.08
1.44
1.89
2.45
2225
2459
2705
2960
1.31
1.72
2.21
2.81
2341
2567
2804
3051
1.56
2.00
2.53
3.16
2449
2669
2900
3140
1.80
2.28
2.85
3.52
2552
2766
2991
3225
2.05
2.57
3.18
3.89
2652
2858
3079
3308
2.31
2.85
3.50
4.25
4300
4750
5200
5650
3333
3682
4031
4380
2914
3210
3506
3803
2.18
2.90
3.76
4.78
2960
3252
3545
3839
2.37
3.10
3.98
5.02
3006
3293
3583
3874
2.56
3.31
4.21
5.26
3050
3334
3620
3909
2.75
3.52
4.43
5.51
3138
3414
3694
3977
3.13
3.94
4.89
6.00
3223
3492
3767
4045
3.52
4.36
5.35
6.50
3307
3570
3838
4111
3.91
4.79
5.82
7.01
3389
3646
3909
4176
4.31
5.23
6.29
7.52
3469
3720
3978
4241
4.71
5.67
6.77
8.03
3547
3793
4046
4305
5.12
6.11
7.25
8.55
6100
6550
7000
7450
4729
5078
5426
5775
4101
4399
4697
4995
5.97
7.34
8.92
10.71
4134
4429
4725
5022
6.23
7.62
9.22
11.03
4166
4460
4754
5049
6.49
7.91
9.52
11.35
4199
4490
4782
5076
6.75
8.19
9.82
11.67
4262
4550
4839
5129
7.29
8.76
10.43
12.32
4325
4609
4894
5181
7.83
9.33
11.04
12.97
4388
4667
4949
5233
8.37
9.91
11.66
13.62
4449
8.91
4725 10.50
5003 12.28
5284 14.28
4509
4782
5057
9.46
11.08
12.91
4570 10.02
4838 11.67
5111 13.53
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
1900
2350
2800
3250
1473
1822
2171
2519
2637
2792
2967
3172
2.13
2.69
3.23
3.91
2835
2980
3143
3331
2.53
3.21
3.85
4.56
3155
3311
3484
3.71
4.48
5.24
3319
3471
3635
4.19
5.11
5.96
3636
3767
3923
5.21
6.31
7.43
4041
4190
7.47
8.86
4306
4436
8.68
10.22
4672
11.57
4901
12.95
3700
4150
4600
5050
2868
3217
3566
3915
3392
3619
3854
4097
4.70
5.61
6.63
7.80
3542
3764
3992
4228
5.42
6.40
7.51
8.75
3685
3901
4124
4354
6.15
7.21
8.39
9.71
3822
4031
4251
4476
6.90
8.02
9.28
10.68
4090
4279
4488
4706
8.49
9.68
11.07
12.63
4347
4519
4712
4921
10.15
11.44
12.91
14.60
4591
4752
4929
5127
11.82
13.30
14.84
16.60
4819
4976
5142
13.43
15.18
16.86
5035
5190
14.97
17.04
5500
5950
6400
6850
4264
4612
4961
5310
4346
4602
4862
5127
9.11
10.60
12.27
14.13
4471
4719
4973
5232
10.14
11.70
13.45
15.38
4591
4834
5082
11.18
12.82
14.63
4708
4945
5189
12.22
13.94
15.83
4930
5160
14.34
16.20
5140
16.46
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
5243
Power ratings (BHP) do not include drive losses.
16.50
CHICAGO BLOWER CORPORATION
DESIGN 51
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
16-3/16 In. Wheel Diameter
1.57 Sq. Ft. Outlet Area
Peak BHP = 0.187 (RPM ÷1000) 3
Tip Speed (fpm) = 4.24 x RPM
165
2886 RPM
CLASS II 3753 RPM
CLASS III 4721 RPM
CFM
OV
FPM
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
900
1450
2000
2550
573
924
1274
1624
649
852
1099
1357
0.05
0.11
0.22
0.41
787
977
1184
1427
0.09
0.18
0.30
0.50
915
1085
1271
1493
0.14
0.24
0.39
0.60
1036
1171
1366
1559
0.19
0.30
0.48
0.70
1333
1515
1705
0.43
0.65
0.93
1491
1638
1837
0.58
0.82
1.16
1641
1756
1945
0.75
1.00
1.37
1782
1873
2042
0.92
1.20
1.59
1987
2135
1.40
1.82
2100
2227
1.62
2.05
3100
3650
4200
4750
1975
2325
2675
3025
1620
1887
2156
2427
0.67
1.05
1.55
2.19
1680
1939
2203
2468
0.79
1.18
1.70
2.36
1737
1989
2247
2509
0.91
1.32
1.86
2.54
1791
2038
2290
2548
1.03
1.46
2.01
2.71
1900
2130
2373
2623
1.28
1.74
2.33
3.07
2019
2222
2453
2695
1.55
2.04
2.66
3.43
2139
2321
2533
2766
1.83
2.35
3.00
3.81
2242
2425
2616
2837
2.10
2.68
3.35
4.18
2331
2525
2705
2908
2.37
3.01
3.72
4.57
2414
2614
2796
2983
2.63
3.33
4.10
4.98
5300
5850
6400
6950
3376
3726
4076
4427
2699
2972
3245
3519
2.99
3.97
5.16
6.56
2736
3006
3276
3547
3.18
4.19
5.39
6.81
2773
3039
3307
3576
3.38
4.40
5.63
7.07
2808
3072
3337
3604
3.58
4.62
5.86
7.32
2878
3136
3396
3659
3.97
5.05
6.34
7.84
2944
3197
3454
3713
4.37
5.49
6.81
8.35
3009
3257
3510
3765
4.78
5.94
7.30
8.87
3072
3316
3565
3817
5.19
6.39
7.78
9.40
3135
3374
3618
3867
5.61
6.84
8.27
9.93
3199
3430
3671
3917
6.04
7.30
8.77
10.46
7500
8050
8600
9150
4777
5127
5478
5828
3793
4067
4341
4616
8.20
10.10
12.27
14.73
3819
4092
4365
4638
8.47
10.39
12.58
15.06
3846
4117
4388
4660
8.75
10.68
12.89
15.39
3872
4141
4411
9.02
10.98
13.20
3923
4189
4457
9.57
11.57
13.83
3974
4237
4501
10.13
12.16
14.47
4023
4283
4545
10.69
12.76
15.11
4072
4329
4589
11.25
13.36
15.75
4119
4374
4631
11.82
13.97
16.39
4166
4419
4674
12.39
14.58
17.04
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
2300
2850
3400
3950
1465
1815
2166
2516
2358
2490
2675
2876
2.31
2.87
3.58
4.44
2549
2654
2816
3013
2.82
3.41
4.17
5.11
2731
2815
2954
3138
3.36
3.99
4.79
5.78
2973
3092
3259
4.60
5.44
6.47
3276
3363
3498
5.88
6.81
7.92
3559
3627
3733
7.25
8.27
9.46
3879
3965
9.81
11.09
4121
4191
11.42
12.79
4500
5050
5600
6150
2866
3217
3567
3917
3063
3243
3445
3669
5.38
6.42
7.62
9.05
3212
3394
3576
3780
6.18
7.34
8.60
10.07
3340
3534
3713
3898
6.95
8.24
9.62
11.13
3456
3657
3844
4022
7.72
9.12
10.64
12.24
3673
3871
4072
4262
9.27
10.84
12.59
14.47
3882
4066
4265
4466
10.89
12.57
14.50
16.62
4091
4253
4443
4644
12.60
14.36
16.41
18.71
4297
4440
4614
14.38
16.23
18.37
`6700
7250
7800
8350
4268
4618
4968
5318
3904
4146
4392
4642
10.71
12.60
14.74
17.15
4004
4238
4479
11.78
13.73
15.94
4106
4330
4564
12.88
14.89
17.17
4212
4424
4650
14.03
16.08
18.41
4440
4624
16.44
18.59
4657
18.87
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
SIZE
CLASS I
165 RA
16-3/16 In. Wheel Diameter
1.57 Sq. Ft. Outlet Area
Peak BHP = 0.210 (RPM ÷1000) 3
Tip Speed (fpm) = 4.24 x RPM
CLASS I
18" SP
RPM
BHP
20" SP
RPM
BHP
4411
14.56
4623
4500
4625
16.24
18.16
16.40
2886 RPM
CLASS II 3753 RPM
CLASS III 4721 RPM
CFM
OV
FPM
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
900
1450
2000
2550
573
924
1274
1624
639
847
1079
1325
0.05
0.12
0.22
0.39
790
967
1177
1406
0.10
0.19
0.31
0.50
917
1070
1267
1482
0.15
0.26
0.41
0.62
1032
1165
1349
1555
0.20
0.33
0.50
0.74
1341
1496
1689
0.50
0.70
0.98
1493
1634
1810
0.65
0.92
1.23
1636
1763
1922
0.80
1.14
1.49
1883
2030
1.36
1.76
1994
2135
1.57
2.05
2100
2236
1.78
2.33
3100
3650
4200
4750
1975
2325
2675
3025
1578
1835
2095
2356
0.63
0.96
1.41
1.98
1646
1894
2146
2402
0.77
1.12
1.59
2.19
1712
1951
2197
2447
0.91
1.29
1.78
2.40
1775
2007
2246
2492
1.05
1.45
1.97
2.61
1896
2114
2343
2578
1.34
1.79
2.35
3.04
2008
2216
2435
2663
1.64
2.13
2.74
3.47
2111
2313
2525
2745
1.94
2.48
3.13
3.91
2208
2405
2610
2825
2.24
2.83
3.53
4.36
2301
2492
2693
2902
2.55
3.19
3.93
4.80
2391
2574
2771
2976
2.87
3.54
4.34
5.26
5300
5850
6400
6950
3376
3726
4076
4427
2619
2882
3147
3411
2.70
3.57
4.62
5.87
2660
2920
3181
3443
2.93
3.82
4.90
6.17
2701
2957
3215
3475
3.16
4.08
5.18
6.47
2741
2994
3249
3506
3.39
4.34
5.46
6.77
2820
3066
3316
3568
3.87
4.86
6.02
7.38
2897
3137
3381
3629
4.35
5.38
6.59
8.00
2973
3207
3446
3689
4.83
5.91
7.17
8.62
3046
3275
3509
3748
5.32
6.45
7.75
9.24
3118
3342
3572
3806
5.82
6.99
8.34
9.88
3188
3408
3633
3864
6.32
7.53
8.93
10.51
7500
8050
8600
9150
4777
5127
5478
5828
3676
3942
4207
4473
7.32
9.00
10.92
13.10
3706
3969
4233
4498
7.64
9.35
11.29
13.49
3735
3997
4259
4522
7.97
9.69
11.66
13.89
3765
4024
4285
4546
8.29
10.04
12.03
14.28
3822
4078
4335
4594
8.95
10.74
12.78
15.07
3879
4131
4386
4641
9.61
11.45
13.53
15.87
3935
4184
4435
10.28
12.16
14.29
3990
4236
4484
10.95
12.88
15.05
4045
4288
4533
11.62
13.60
15.82
4099
4338
4581
12.31
14.33
16.59
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
2300
2850
3400
3950
1465
1815
2166
2516
2362
2499
2653
2833
2.57
3.26
3.92
4.73
2543
2669
2812
2977
3.06
3.89
4.68
5.53
2826
2964
3117
4.49
5.45
6.37
2975
3109
3254
5.08
6.21
7.25
3264
3376
3514
6.33
7.65
9.03
3624
3754
9.06
10.76
3866
3977
10.56
12.40
4190
14.04
4398
15.75
4500
5050
5600
6150
2866
3217
3567
3917
3028
3229
3438
3653
5.69
6.78
8.02
9.42
3163
3360
3563
3772
6.57
7.75
9.09
10.58
3292
3484
3682
3887
7.45
8.73
10.16
11.76
3417
3602
3796
3997
8.37
9.72
11.25
12.94
3661
3827
4011
4205
10.33
11.75
13.43
15.32
3894
4045
4214
4399
12.36
13.93
15.68
17.72
4113
4256
4412
4585
14.38
16.20
18.06
20.18
4319
4458
4605
16.31
18.48
20.55
4514
4651
18.18
20.73
6700
7250
7800
8350
4268
4618
4968
5318
3875
4102
4333
4568
11.01
12.80
14.81
17.05
3988
4208
4434
4664
12.26
14.14
16.24
18.58
4097
4312
4533
13.53
15.50
17.69
4202
4413
4630
14.81
16.87
19.15
4404
4608
17.38
19.64
4593
19.98
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the airstream.
20" SP
RPM
BHP
4702
20.04
Power ratings (BHP) do not include drive losses.
9
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
17-13/16 In. Wheel Diameter
1.92 Sq. Ft. Outlet Area
Peak BHP = 0.302 (RPM ÷1000) 3
Tip Speed (fpm) = 4.66 x RPM
182
SIZE
2653 RPM
CLASS II 3437 RPM
CLASS III 4323 RPM
CFM
OV
FPM
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
1200
1900
2600
3300
625
990
1354
1719
618
821
1060
1308
0.07
0.16
0.32
0.58
741
923
1133
1368
0.12
0.24
0.42
0.70
849
1024
1204
1425
0.18
0.32
0.53
0.83
953
1103
1284
1481
0.24
0.40
0.64
0.96
1241
1426
1601
0.57
0.87
1.24
1376
1536
1724
0.76
1.09
1.54
1506
1637
1825
0.96
1.32
1.83
1631
1736
1913
1.17
1.56
2.11
1749
1835
1994
1.40
1.82
2.39
1932
2073
2.08
2.69
4000
4700
5400
6100
2083
2448
2812
3177
1561
1816
2074
2333
0.96
1.50
2.21
3.12
1612
1861
2114
2369
1.11
1.67
2.40
3.34
1662
1905
2152
2403
1.26
1.85
2.61
3.57
1709
1947
2190
2437
1.42
2.02
2.81
3.79
1801
2027
2262
2503
1.73
2.38
3.22
4.25
1898
2105
2331
2566
2.07
2.76
3.63
4.72
2003
2185
2399
2627
2.43
3.15
4.06
5.19
2101
2272
2468
2687
2.79
3.56
4.50
5.67
2185
2361
2540
2748
3.14
3.99
4.96
6.16
2261
2446
2617
2809
3.48
4.41
5.44
6.66
6800
7500
8200
8900
3542
3906
4271
4635
2593
2854
3115
3376
4.26
5.66
7.34
9.32
2625
2883
3142
3401
4.51
5.93
7.64
9.65
2657
2912
3168
3426
4.76
6.21
7.94
9.97
2687
2940
3194
3450
5.01
6.48
8.24
10.30
2748
2995
3245
3497
5.52
7.04
8.84
10.95
2806
3049
3295
3544
6.03
7.60
9.45
11.61
2862
3101
3344
3590
6.55
8.17
10.07
12.28
2917
3152
3392
3635
7.07
8.74
10.69
12.95
2971
3202
3439
3679
7.60
9.32
11.31
13.62
3025
3252
3484
3722
8.14
9.90
11.94
14.30
9600
10300
11000
5000
5365
5729
3638
3900
4162
11.65
14.33
17.40
3661
3921
4182
11.99
14.70
17.79
3684 12.34
3943 15.08
4202 18.19
3706
3964
4222
12.69
15.45
18.59
3751
4006
4262
13.40
16.21
19.40
3795
4047
4300
14.11
16.96
20.21
3838
4087
14.82
17.73
3880
4127
15.54
18.49
3921
4166
16.26
19.27
396216.99
4205 20.04
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
2600
3300
4000
4700
1354
1719
2083
2448
2121
2230
2398
2590
2.64
3.30
4.16
5.23
2299
2385
2529
2714
3.24
3.95
4.87
6.03
2536
2658
2829
4.64
5.61
6.83
2684
2787
2940
5.37
6.39
7.66
2964
3039
3160
6.89
8.03
9.40
3282
3378
9.78
11.26
3514
3591
11.62
13.21
3735
3799
13.55
15.26
4000
17.39
4194
19.60
5400
6100
6800
7500
2812
3177
3542
3906
2770
2942
3135
3350
6.42
7.72
9.26
11.09
2905
3079
3253
3449
7.38
8.84
10.44
12.32
3021
3206
3377
3555
8.30
9.93
11.67
13.61
3126
3318
3497
3666
9.22
10.99
12.91
14.96
3324
3513
3704
3884
11.08
13.07
15.30
17.69
3516
3690
3880
4072
13.04
15.16
17.61
20.31
3707
3861
4042
4234
15.10
17.33
19.93
22.86
3896
4030
4197
17.25
19.58
22.30
4082
4199
19.49
21.92
4264
21.81
8200
8900
9600
10300
4271
4635
5000
5365
3575
3806
4042
4281
13.22
15.67
18.45
21.60
3664
3889
4120
14.52
17.05
19.93
3755
3971
4196
15.86
18.47
21.43
3850
4055
4273
17.26
19.92
22.96
4054
4232
20.20
22.97
4251
23.18
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
10
CLASS I
182 RA
17-13/16 In. Wheel Diameter
1.92 Sq. Ft. Outlet Area
Peak BHP = 0.339 (RPM ÷1000) 3
Tip Speed (fpm) = 4.66 x RPM
CLASS I
2653 RPM
CLASS II 3437 RPM
CLASS II 4323 RPM
CFM
OV
FPM
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
1200
1900
2600
3300
625
990
1354
1719
610
813
1039
1276
0.08
0.16
0.31
0.55
740
918
1123
1345
0.14
0.25
0.43
0.70
853
1009
1202
1412
0.20
0.34
0.55
0.85
952
1091
1274
1475
0.27
0.44
0.68
1.00
1246
1404
1593
0.65
0.93
1.32
1382
1523
1700
0.86
1.20
1.63
1506
1637
1799
1.06
1.49
1.96
1625
1745
1892
1.26
1.78
2.29
1845
1984
2.07
2.65
1939
2073
2.34
3.02
4000
4700
5400
6100
2083
2448
2812
3177
1519
1765
2014
2264
0.89
1.37
2.00
2.82
1577
1816
2058
2304
1.07
1.58
2.24
3.08
1634
1865
2102
2343
1.25
1.79
2.48
3.35
1689
1913
2144
2381
1.43
2.00
2.72
3.62
1794
2006
2228
2456
1.81
2.43
3.21
4.16
1892
2096
2308
2529
2.19
2.87
3.70
4.72
1985
2181
2386
2600
2.57
3.31
4.21
5.28
2071
2262
2462
2670
2.96
3.76
4.72
5.85
2153
2339
2534
2737
3.35
4.22
5.23
6.42
2231
2413
2604
2803
3.75
4.67
5.75
7.00
6800
7500
8200
8900
3542
3906
4271
4635
2515
2767
3019
3272
3.83
5.07
6.56
8.32
2551
2800
3049
3300
4.12
5.39
6.91
8.70
2586
2832
3079
3327
4.42
5.72
7.27
9.08
2621
2863
3108
3354
4.72
6.05
7.62
9.47
2689
2926
3166
3408
5.32
6.71
8.34
10.25
2755
2987
3222
3460
5.94
7.38
9.07
11.03
2821
3047
3278
3512
6.56
8.06
9.81
11.83
2885
3107
3333
3563
7.18
8.74
10.55
12.63
2948
3165
3387
3614
7.81
9.43
11.29
13.43
3009
3222
3441
3664
8.45
10.12
12.05
14.24
9600
10300
11000
11700
5000
5365
5729
6094
3525
3779
4033
4286
10.37
12.75
15.46
18.54
3551
3803
4055
4308
10.78
13.19
15.93
19.04
3576
3827
4077
11.20
13.63
16.40
3602
3850
4099
11.61
14.07
16.87
3651
3897
4143
12.45
14.97
17.83
3701
3943
4187
13.29
15.87
18.79
3749
3988
4229
14.14
16.78
19.75
3797
4033
4272
15.00
17.69
20.73
3844
4078
4314
15.86
18.61
21.70
3891
4122
16.73
19.54
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
2600
3300
4000
4700
1354
1719
2083
2448
2117
2242
2384
2552
2.88
3.77
4.60
5.59
2396
2531
2684
4.48
5.49
6.55
2541
2671
2813
5.16
6.40
7.56
2680
2803
2939
5.85
7.28
8.61
3046
3177
8.95
10.73
3276
3395
10.63
12.76
3599
14.71
3794
16.68
3986
18.75
5400
6100
6800
7500
2812
3177
3542
3906
2737
2929
3128
3334
6.79
8.16
9.73
11.52
2861
3048
3242
3442
7.84
9.34
11.03
12.94
2979
3161
3350
3545
8.91
10.52
12.34
14.37
3093
3268
3454
3645
10.02
11.71
13.66
15.81
3316
3473
3648
3834
12.37
14.17
16.30
18.71
3528
3672
3833
4010
14.82
16.80
19.04
21.63
3728
3864
4012
4178
17.23
19.55
21.91
24.63
3915
4048
4188
19.54
22.31
24.93
4093
4223
21.77
25.02
8200
8900
9600
10300
4271
4635
5000
5365
3546
3763
3984
4210
13.56
15.87
18.48
21.40
3648
3859
4075
4296
15.10
17.52
20.25
23.28
3746
3953
4164
16.64
19.19
22.03
3842
4044
4251
18.21
20.87
23.82
4024
4219
21.35
24.26
4195
24.53
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
20" SP
RPM
BHP
4265
Power ratings (BHP) do not include drive losses.
24.01
CHICAGO BLOWER CORPORATION
DESIGN 51
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
19-11/16 In. Wheel Diameter
2.30 Sq. Ft. Outlet Area
Peak BHP = 0.499 (RPM ÷1000) 3
Tip Speed (fpm) = 5.15 x RPM
200
2355 RPM
CLASS II 3063 RPM
CLASS III 3853 RPM
CFM
OV
FPM
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
1300
2100
2900
3700
565
913
1261
1609
528
690
889
1097
0.07
0.16
0.32
0.57
642
796
960
1156
0.13
0.25
0.43
0.71
749
883
1035
1211
0.20
0.34
0.55
0.86
850
954
1113
1267
0.27
0.43
0.69
1.01
1090
1235
1390
0.63
0.94
1.34
1222
1336
1497
0.85
1.19
1.67
1346
1435
1585
1.09
1.45
1.98
1463
1532
1665
1.34
1.74
2.30
1628
1743
2.04
2.63
1722
1820
2.35
2.97
4500
5300
6100
6900
1957
2304
2652
3000
1310
1526
1744
1963
0.95
1.48
2.18
3.08
1360
1570
1782
1997
1.12
1.67
2.40
3.34
1408
1611
1819
2031
1.29
1.87
2.63
3.59
1453
1651
1855
2063
1.46
2.07
2.86
3.85
1545
1729
1924
2126
1.83
2.49
3.32
4.37
1646
1806
1991
2186
2.23
2.92
3.80
4.90
1744
1890
2058
2245
2.64
3.38
4.30
5.44
1827
1978
2129
2304
3.03
3.86
4.81
5.99
1900
2059
2204
2365
3.41
4.34
5.36
6.57
1968
2131
2280
2429
3.79
4.80
5.92
7.16
7700
8500
9300
10100
3348
3696
4043
4391
2183
2403
2624
2845
4.22
5.60
7.27
9.25
2214
2431
2650
2870
4.50
5.91
7.61
9.62
2244
2459
2676
2893
4.78
6.23
7.95
9.99
2274
2487
2701
2917
5.07
6.54
8.29
10.36
2331
2540
2750
2963
5.64
7.17
8.98
11.10
2387
2591
2798
3007
6.23
7.81
9.68
11.86
2441
2641
2845
3051
6.82
8.46
10.38
12.61
2494
2690
2891
3094
7.42
9.11
11.09
13.38
2546
2738
2935
3136
8.03
9.78
11.80
14.15
2600
2786
2979
3177
8.66
10.45
12.53
14.92
10900
11700
12500
13300
4739
5087
5435
5783
3067
3289
3511
3733
11.56
14.23
17.29
20.77
3090
3310
3531
3752
11.96
14.66
17.75
21.25
3112
3331
3550
3770
12.36
15.09
18.20
21.73
3133
3351
3569
3788
12.75
15.51
18.66
22.22
3176
3391
3607
3824
13.56
16.37
19.58
23.19
3218
3431
3645
14.37
17.24
20.50
3260
3470
3681
15.18
18.11
21.42
3300
3508
3717
16.00
18.99
22.36
3340
3545
3753
16.83
19.87
23.29
3379
3582
3788
17.66
20.75
24.24
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
2900
3700
4500
5300
1261
1609
1957
2304
1900
1973
2097
2255
3.02
3.70
4.58
5.70
2122
2224
2368
4.47
5.42
6.61
2266
2350
2477
5.29
6.29
7.55
2405
2474
2585
6.14
7.21
8.53
2715
2799
9.16
10.59
2943
3008
11.23
12.79
3211
15.11
3405
17.54
3592
20.07
6100
6900
7700
8500
2652
3000
3348
3696
2416
2563
2713
2882
7.00
8.42
9.98
11.83
2530
2689
2833
2985
8.05
9.66
11.38
13.28
2633
2796
2950
3094
9.08
10.85
12.78
14.82
2731
2893
3053
3202
10.14
12.03
14.13
16.37
2919
3069
3231
3392
12.32
14.39
16.76
19.38
3106
3236
3390
3553
14.64
16.83
19.39
22.28
3290
3401
3541
3698
17.08
19.39
22.08
25.17
3471
3566
3689
3837
19.64
22.06
24.87
28.12
3648
3729
3838
22.30
24.84
27.77
9300
10100
10900
11700
4043
4391
4739
5087
3066
3258
3455
3654
14.00
16.49
19.33
22.54
3155
3338
3529
3725
15.52
18.10
21.03
24.34
3248
3420
3604
3794
17.10
19.75
22.77
26.17
3347
3505
3679
18.77
21.46
24.54
3543
3687
3839
22.16
25.08
28.28
3714
25.43
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
SIZE
CLASS I
200 RA
19-11/16 In. Wheel Diameter
2.30 Sq. Ft. Outlet Area
Peak BHP = 0.559 (RPM ÷1000) 3
Tip Speed (fpm) = 5.15 x RPM
CLASS I
20" SP
RPM
BHP
3819
25.06
2355 RPM
CLASS II 3063 RPM
CLASS III 3853 RPM
CFM
OV
FPM
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
1300
2100
2900
3700
565
913
1261
1609
520
687
874
1072
0.08
0.17
0.31
0.55
645
787
956
1140
0.15
0.27
0.45
0.71
750
872
1030
1204
0.22
0.37
0.59
0.89
951
1098
1264
0.48
0.73
1.06
1096
1220
1375
0.72
1.01
1.42
1222
1335
1475
0.94
1.33
1.78
1442
1568
1.66
2.15
1541
1658
1.97
2.55
1632
1745
2.27
2.97
1720
1828
2.58
3.39
4500
5300
6100
6900
1957
2304
2652
3000
1277
1484
1694
1906
0.89
1.36
1.99
2.80
1333
1533
1737
1944
1.09
1.60
2.26
3.10
1388
1581
1779
1982
1.29
1.83
2.53
3.40
1441
1628
1821
2019
1.50
2.08
2.80
3.71
1541
1717
1901
2091
1.93
2.57
3.36
4.33
1634
1802
1978
2162
2.36
3.07
3.93
4.97
1720
1882
2053
2230
2.79
3.57
4.50
5.61
1800
1958
2124
2296
3.23
4.08
5.08
6.25
1877
2030
2192
2360
3.69
4.60
5.67
6.91
1952
2098
2257
2422
4.16
5.11
6.25
7.57
7700
8500
9300
10100
3348
3696
4043
4391
2118
2331
2545
2759
3.81
5.05
6.53
8.29
2153
2363
2574
2786
4.14
5.41
6.93
8.72
2187
2394
2602
2812
4.48
5.78
7.33
9.16
2220
2425
2631
2838
4.82
6.16
7.74
9.60
2286
2485
2686
2890
5.51
6.91
8.56
10.49
2351
2544
2741
2941
6.21
7.68
9.39
11.38
2413
2602
2795
2991
6.92
8.45
10.23
12.29
2475
2659
2848
3040
7.63
9.23
11.08
13.20
2535
2715
2900
3089
8.35
10.02
11.93
14.12
2593
2769
2951
3137
9.08
10.81
12.79
15.05
10900
11700
12500
13300
4739
5087
5435
5783
2973
3188
3403
3618
10.34
12.71
15.42
18.50
2998
3211
3425
3639
10.81
13.21
15.96
19.07
3023
3234
3446
3659
11.28
13.71
16.50
19.64
3047
3257
3468
3679
11.75
14.22
17.04
20.22
3095
3302
3510
3719
12.70
15.24
18.12
21.37
3143
3347
3552
3759
13.67
16.27
19.22
22.53
3190
3391
3593
3798
14.64
17.31
20.32
23.70
3236
3434
3634
3836
15.62
18.36
21.44
24.88
3281
3477
3675
16.60
19.41
22.55
3327
3519
3715
17.60
20.46
23.68
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
3700
4500
5300
6100
1609
1957
2304
2652
1983
2097
2229
2380
4.19
5.16
6.18
7.44
2125
2235
2355
2496
4.96
6.18
7.32
8.65
2261
2363
2478
2607
5.74
7.16
8.51
9.90
2483
2595
2717
8.10
9.71
11.23
2711
2813
2927
9.98
12.03
13.98
3014
3123
14.22
16.70
3205
3305
16.46
19.30
6900
7700
8500
9300
3000
3348
3696
4043
2540
2705
2875
3051
8.89
10.54
12.41
14.53
2650
2811
2977
3147
10.23
12.02
14.03
16.28
2754
2912
3074
3240
11.58
13.51
15.66
18.05
2855
3007
3166
3330
12.96
15.01
17.31
19.84
3050
3189
3341
3499
15.89
18.07
20.61
23.43
3239
3365
3506
3658
18.98
21.31
23.99
27.04
3418
3536
3665
3809
22.11
24.74
27.53
30.74
10100
10900
11700
12500
4391
4739
5087
5435
3231
3416
3604
3795
16.91
19.60
22.60
25.94
3323
3502
3686
18.80
21.62
24.75
3411
3587
3766
20.71
23.66
26.93
3497
3669
3845
22.63
25.71
29.12
3661
3827
26.51
29.87
3816
30.41
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
3807
3477
21.82
3644
24.37
3586
3700
3821
25.14
28.23
31.25
3746
28.06
27.05
Power ratings (BHP) do not include drive losses.
11
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
21-9/16 In. Wheel Diameter
2.85 Sq. Ft. Outlet Area
Peak BHP = 0.786 (RPM ÷1000) 3
Tip Speed (fpm) = 5.65 x RPM
222
SIZE
2205 RPM
CLASS II 2868 RPM
CLASS III 3607 RPM
CFM
OV
FPM
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
1500
2500
3500
4500
526
877
1228
1579
472
626
814
1012
0.08
0.19
0.38
0.70
579
723
879
1065
0.15
0.30
0.52
0.87
680
802
946
1115
0.23
0.40
0.67
1.05
773
868
1017
1165
0.32
0.51
0.83
1.23
993
1129
1275
0.75
1.13
1.63
1113
1222
1374
1.01
1.43
2.03
1228
1312
1455
1.29
1.75
2.41
1400
1528
2.09
2.80
1487
1598
2.45
3.20
1572
1668
2.83
3.61
5500
6500
7500
8500
1930
2281
2632
2982
1214
1419
1626
1834
1.19
1.86
2.77
3.94
1259
1458
1661
1865
1.39
2.10
3.04
4.25
1302
1496
1694
1895
1.60
2.35
3.32
4.57
1343
1532
1726
1924
1.81
2.59
3.60
4.88
1425
1601
1788
1980
2.25
3.10
4.17
5.52
1514
1670
1848
2034
2.74
3.62
4.76
6.17
1604
1743
1907
2087
3.24
4.18
5.36
6.83
1682
1822
1969
2139
3.72
4.76
5.98
7.51
1749
1897
2035
2193
4.19
5.35
6.64
8.20
1811
1964
2103
2248
4.66
5.93
7.33
8.93
9500
10500
11500
12500
3333
3684
4035
4386
2043
2252
2462
2672
5.42
7.23
9.42
12.01
2071
2277
2485
2694
5.76
7.61
9.84
12.47
2098
2302
2508
2715
6.11
8.00
10.26
12.92
2124
2327
2531
2736
6.47
8.38
10.68
13.38
2176
2374
2575
2777
7.18
9.17
11.53
14.30
2226
2420
2617
2817
7.89
9.95
12.39
15.23
2274
2465
2659
2856
8.62
10.75
13.25
16.16
2321
2509
2700
2894
9.36
11.55
14.13
17.11
2368
2552
2740
2932
10.11
12.37
15.00
18.06
2415
2594
2779
2968
10.87
13.19
15.89
19.01
13500
14500
15500
16500
4737
5088
5439
5789
2883
3093
3304
3515
15.05
18.57
22.60
27.18
2903
3112
3322
3532
15.54
19.09
23.16
27.78
2922
3130
3339
3548
16.03
19.62
23.72
28.38
2942
3148
3356
3564
16.52
20.15
24.29
28.98
2980
3184
3390
3596
17.52
21.21
25.42
30.18
3017
3220
3423
18.51
22.28
26.56
3054
3254
3456
19.52
23.36
27.71
3090
3288
3488
20.53
24.44
28.86
3126
3322
3519
21.55
25.53
30.02
316022.58
335526.62
355131.18
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
3500
4500
5500
6500
1228
1579
1930
2281
1735
1806
1927
2079
3.63
4.49
5.61
7.04
1941
2041
2182
5.42
6.62
8.15
2072
2154
2279
6.40
7.68
9.28
2198
2266
2376
7.43
8.79
10.46
2484
2567
11.13
12.96
2691
2755
13.64
15.62
2886
2938
16.28
18.42
3115
21.36
3284
24.42
3447
27.58
7500
8500
9500
10500
2632
2982
3333
3684
2230
2367
2513
2679
8.68
10.45
12.47
14.87
2336
2482
2619
2767
9.97
12.00
14.16
16.64
2430
2583
2725
2862
11.24
13.49
15.90
18.50
2518
2673
2822
2959
12.53
14.94
17.60
20.41
2687
2833
2988
3138
15.18
17.83
20.87
24.18
2854
2983
3132
3287
17.98
20.81
24.10
27.79
3019
3130
3268
3420
20.94
23.90
27.38
31.36
3181
3277
3401
3545
24.03
27.14
30.77
34.96
3340
3423
3532
27.25
30.51
34.28
3496
3566
30.59
34.00
11500
12500
13500
14500
4035
4386
4737
5088
2857
3041
3228
3419
17.69
20.94
24.64
28.83
2934
3112
3295
3482
19.55
22.91
26.73
31.04
3015
3183
3361
3544
21.47
24.92
28.86
33.30
3100
3256
3427
3605
23.48
27.00
31.03
35.59
3276
3414
3564
27.66
31.39
35.55
3437
3576
31.78
35.95
3575
35.74
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
12
CLASS I
222 RA
1/4" SP
RPM
BHP
21-9/16 In. Wheel Diameter
2.85 Sq. Ft. Outlet Area
Peak BHP = 0.881 (RPM ÷1000) 3
Tip Speed (fpm) = 5.65 x RPM
CLASS I
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
2205 RPM
CLASS II 2868 RPM
CLASS III 3607 RPM
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
0.09
0.19
0.38
0.67
582
714
874
1049
0.17
0.31
0.54
0.87
679
792
943
1107
0.25
0.44
0.71
1.08
866
1005
1162
0.57
0.87
1.29
998
1116
1263
0.85
1.22
1.72
1114
1220
1354
1.11
1.60
2.16
1318
1438
2.00
2.61
1408
1520
2.38
3.10
1492
1599
2.74
3.60
1572
1675
3.11
4.11
1182
1380
1579
1780
1.10
1.71
2.52
3.56
1233
1424
1618
1814
1.35
2.00
2.85
3.93
1283
1466
1655
1848
1.60
2.29
3.18
4.31
1331
1508
1692
1881
1.85
2.58
3.51
4.68
1421
1589
1764
1946
2.37
3.18
4.20
5.45
1505
1666
1834
2009
2.89
3.79
4.89
6.22
1583
1738
1901
2070
3.43
4.41
5.59
7.01
1656
1807
1965
2130
3.96
5.04
6.30
7.80
1726
1872
2026
2187
4.51
5.66
7.02
8.61
1793
1934
2086
2243
5.08
6.30
7.74
9.41
3333
3684
4035
4386
1982
2184
2387
2590
4.87
6.48
8.41
10.71
2012
2212
2412
2614
5.28
6.93
8.91
11.25
2043
2240
2438
2637
5.70
7.39
9.41
11.78
2073
2267
2463
2660
6.12
7.85
9.91
12.33
2132
2321
2513
2706
6.96
8.78
10.92
13.42
2189
2373
2561
2752
7.82
9.72
11.94
14.53
2245
2425
2609
2796
8.69
10.67
12.98
15.65
2300
2476
2656
2840
9.57
11.63
14.02
16.77
2354
2526
2703
2884
10.45
12.60
15.07
17.90
2406 11.35
2575 13.57
274916.13
2926 19.05
13500
14500
15500
16500
4737
5088
5439
5789
2793
2997
3201
3405
13.40
16.50
20.06
24.11
2815
3018
3220
3423
13.97
17.12
20.73
24.81
2837
3038
3239
3441
14.55
17.75
21.39
25.52
2859
3058
3258
3459
15.14
18.37
22.06
26.23
2902
3098
3296
3495
16.32
19.63
23.40
27.66
2944
3138
3333
3530
17.51
20.90
24.76
29.09
2985
3177
3370
3564
18.70
22.19
26.12
30.54
3027
3216
3406
3599
19.91
23.48
27.49
32.00
3067
3254
3442
21.13
24.78
28.88
3108 22.35
3292 26.08
347830.26
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
4500
5500
6500
7500
1579
1930
2281
2632
1816
1925
2052
2197
5.10
6.29
7.59
9.20
1945
2050
2166
2302
6.03
7.54
8.96
10.67
2068
2167
2277
2402
6.98
8.75
10.41
12.19
2276
2383
2500
9.92
11.88
13.78
2482
2582
2690
12.20
14.76
17.14
2764
2869
17.48
20.53
2936
3035
20.18
23.77
3105
3191
23.04
26.88
3341
29.99
3488
33.20
8500
9500
10500
11500
2982
3333
3684
4035
2350
2507
2670
2838
11.05
13.15
15.55
18.27
2450
2603
2762
2925
12.69
14.97
17.54
20.43
2544
2694
2849
3008
14.34
16.81
19.55
22.61
2635
2781
2933
3089
16.03
18.65
21.57
24.81
2810
2946
3092
3243
19.56
22.39
25.64
29.24
2980
3103
3240
3386
23.33
26.31
29.77
33.70
3142
3256
3383
3522
27.18
30.46
34.06
38.21
3296
3405
3523
30.98
34.75
38.56
3441
3547
34.63
39.05
3579
38.17
12500
13500
14500
15500
4386
4737
5088
5439
3011
3187
3366
3549
21.35
24.82
28.72
33.06
3092
3264
3440
23.68
27.31
31.37
3172
3340
3512
26.02
29.83
34.05
3249
3414
3582
28.39
32.36
36.76
3398
3556
33.17
37.49
3537
38.00
CFM
OV
FPM
1500
2500
3500
4500
526
877
1228
1579
465
623
800
988
5500
6500
7500
8500
1930
2281
2632
2982
9500
10500
11500
12500
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
Power ratings (BHP) do not include drive losses.
CHICAGO BLOWER CORPORATION
DESIGN 51
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
24 In. Wheel Diameter
3.45 Sq. Ft. Outlet Area
Peak BHP = 1.318 (RPM ÷1000) 3
Tip Speed (fpm) = 6.28 x RPM
245
CLASS I
1991 RPM
CLASS II 2590 RPM
CLASS III 3258 RPM
CFM
OV
FPM
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
2700
3900
5100
6300
783
1130
1478
1826
525
686
859
1038
0.18
0.38
0.71
1.21
604
753
913
1082
0.29
0.54
0.91
1.45
681
811
964
1125
0.41
0.69
1.12
1.70
753
864
1012
1168
0.54
0.85
1.32
1.96
885
970
1095
1246
0.83
1.18
1.73
2.47
1005
1071
1177
1315
1.16
1.55
2.14
2.97
1165
1258
1381
1.95
2.58
3.47
1255
1337
1446
2.39
3.05
3.98
1342
1412
1513
2.84
3.55
4.52
1424
1485
1578
3.32
4.07
5.08
7500
8700
9900
11100
2174
2522
2870
3217
1221
1405
1590
1776
1.93
2.91
4.18
5.79
1258
1437
1619
1802
2.21
3.23
4.54
6.19
1294
1469
1647
1827
2.50
3.55
4.90
6.59
1331
1500
1675
1852
2.79
3.88
5.28
7.01
1402
1563
1730
1902
3.40
4.57
6.04
7.85
1468
1624
1785
1951
4.01
5.28
6.83
8.71
1527
1681
1838
2000
4.61
5.99
7.64
9.60
1584
1735
1890
2048
5.20
6.69
8.45
10.51
1639
1785
1939
2094
5.80
7.38
9.25
11.42
1694
1834
1985
2139
6.41
8.06
10.04
12.32
12300
13500
14700
15900
3565
3913
4261
4609
1963
2150
2337
2525
7.78
10.18
13.05
16.42
1986
2171
2357
2543
8.22
10.67
13.58
16.99
2009
2192
2376
2561
8.67
11.16
14.11
17.56
2032
2213
2395
2579
9.12
11.65
14.64
18.13
2077
2254
2433
2614
10.04
12.65
15.72
19.29
2121
2295
2471
2649
10.98
13.67
16.82
20.47
2165
2335
2509
2684
11.94
14.70
17.93
21.66
2210
2376
2546
2718
12.93
15.76
19.07
22.88
2253
2416
2583
2753
13.93
16.84
20.22
24.10
2296
2456
2620
2787
14.93
17.94
21.39
25.35
17100
18300
19500
4957
5304
5652
2713
2901
3090
20.33
24.82
29.94
2730
2917
3104
20.93
25.47
30.63
2747
2933
3119
21.55
26.13
31.33
2763
2948
3134
22.17
26.79
32.03
2796
2979
3163
23.41
28.11
33.43
2829
3010
3191
24.67
29.45
34.85
2861
3040
3220
25.94
30.80
36.29
2894
3070
3249
27.23
32.17
37.74
2926
3100
28.53
33.55
2958
3130
29.85
34.95
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
5100
6300
7500
8700
1478
1826
2174
2522
1624
1703
1805
1929
5.19
6.26
7.68
9.46
1756
1822
1914
2024
6.38
7.54
9.02
10.90
1882
1936
2019
2120
7.62
8.89
10.44
12.39
2046
2120
2214
10.31
11.94
13.96
2257
2312
2393
13.31
15.13
17.29
2451
2496
2563
16.45
18.55
20.87
2672
2726
22.14
24.67
2838
2884
25.85
28.65
3037
32.78
3184
37.03
9900
11100
12300
13500
2870
3217
3565
3913
2072
2223
2377
2534
11.60
14.10
16.94
20.15
2155
2301
2453
2608
13.18
15.85
18.91
22.35
2239
2376
2524
2677
14.78
17.61
20.86
24.52
2323
2451
2593
2743
16.44
19.39
22.80
26.65
2490
2600
2727
2868
19.92
23.07
26.73
30.92
2650
2749
2862
2991
23.63
26.93
30.80
35.24
2803
2894
2997
3113
27.58
31.00
35.04
39.69
2950
3034
3130
3237
31.73
35.30
39.47
44.29
3093
3169
36.07
39.79
3233
40.56
14700
15900
17100
18300
4261
4609
4957
5304
2693
2855
3021
3190
23.78
27.89
32.54
37.79
2764
2923
3085
3249
26.18
30.48
35.29
40.69
2832
2988
3147
28.58
33.08
38.08
2897
3051
3208
30.95
35.68
40.88
3017
3170
35.61
40.79
3131
40.25
3244
44.96
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
245 RA
1/4" SP
RPM
BHP
24 In. Wheel Diameter
3.45 Sq. Ft. Outlet Area
Peak BHP = 1.493 (RPM ÷1000) 3
Tip Speed (fpm) = 6.28 x RPM
1/2" SP
RPM BHP
CLASS I
1991 RPM
CLASS II 2590 RPM
CLASS III 3258 RPM
3/4" SP
RPM
BHP
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
0.29
0.49
0.77
1.17
659
765
888
1023
0.42
0.66
0.99
1.44
733
827
942
1070
0.57
0.85
1.22
1.71
878
938
1042
1159
0.90
1.23
1.69
2.28
1041
1133
1242
1.63
2.18
2.85
1145
1216
1319
2.09
2.68
3.44
1244
1296
1392
2.59
3.19
4.05
1336
1374
1461
3.10
3.74
4.66
1454
1527
4.33
5.28
1123
1276
1432
1589
1.72
2.44
3.36
4.51
1166
1314
1466
1620
2.03
2.79
3.75
4.95
1208
1352
1500
1651
2.34
3.15
4.16
5.39
1287
1423
1564
1710
3.00
3.89
4.98
6.30
1362
1491
1626
1767
3.67
4.65
5.83
7.24
1433
1556
1686
1822
4.35
5.43
6.70
8.19
1501
1618
1744
1875
5.04
6.21
7.58
9.16
1565
1679
1800
1927
5.75
7.01
8.46
10.14
1627
1737
1854
1978
6.46
7.81
9.36
11.13
5.44
7.09
9.05
11.35
1748
1907
2068
2229
5.92
7.61
9.61
11.95
1776
1933
2092
2251
6.40
8.13
10.18
12.57
1804
1959
2116
2274
6.88
8.66
10.75
13.19
1858
2010
2163
2317
7.88
9.74
11.92
14.44
1911
2058
2208
2360
8.90
10.85
13.11
15.71
1962
2106
2253
2402
9.94
11.97
14.32
17.01
2012
2152
2296
2443
11.00
13.12
15.55
18.32
2060
2198
2339
2483
12.07
14.28
16.79
19.65
2108
2242
2381
2522
13.15
15.45
18.05
20.99
14.01
17.07
20.56
24.49
2390
2552
2714
2877
14.66
17.77
21.30
25.28
2411
2572
2733
2895
15.32
18.47
22.04
26.07
2432
2592
2752
2912
15.98
19.18
22.79
26.86
2473
2630
2788
2947
17.32
20.61
24.31
28.46
2513
2668
2824
2981
18.68
22.05
25.84
30.08
2553
2705
2859
3014
20.06
23.52
27.39
31.72
2591
2742
2894
3047
21.46
25.00
28.96
33.37
2629
2778
2928
3080
22.87
26.49
30.54
35.04
2667
2813
2962
3112
24.30
28.01
32.14
36.72
CFM
OV
FPM
2700
3900
5100
6300
783
1130
1478
1826
487
622
769
921
0.17
0.32
0.56
0.91
579
697
830
974
7500
8700
9900
11100
2174
2522
2870
3217
1078
1236
1396
1557
1.42
2.09
2.97
4.08
12300
13500
14700
15900
3565
3913
4261
4609
1718
1880
2043
2206
17100
18300
19500
20700
4957
5304
5652
6000
2369
2532
2696
2859
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
5100
6300
7500
8700
1478
1826
2174
2522
1608
1654
1744
1847
5.62
6.57
7.92
9.45
1749
1782
1853
1951
6.95
8.01
9.40
11.12
1909
1960
2049
9.57
10.95
12.81
2030
2068
2143
11.20
12.62
14.54
2248
2281
2328
14.49
16.30
18.19
2481
2513
20.19
22.27
2662
2695
24.11
26.66
2866
31.19
3025
35.74
9900
11100
12300
13500
2870
3217
3565
3913
1958
2076
2200
2329
11.18
13.14
15.34
17.82
2056
2169
2288
2412
13.04
15.17
17.56
20.23
2150
2259
2373
2493
14.93
17.24
19.81
22.66
2240
2345
2455
2572
16.83
19.34
22.09
25.12
2409
2507
2611
2722
20.71
23.60
26.73
30.12
2572
2659
2758
2863
24.77
27.94
31.45
35.22
2734
2805
2897
2998
29.17
32.40
36.23
40.40
2897
2949
3031
3126
33.94
37.11
41.11
45.63
3056
3095
3161
3249
38.95
42.16
46.15
50.92
14700
15900
17100
18300
4261
4609
4957
5304
2462
2600
2740
2883
20.61
23.73
27.21
31.08
2541
2674
2811
2950
23.20
26.50
30.16
34.20
2618
2747
2880
3017
25.82
29.30
33.14
37.37
2693
2819
2948
3081
28.46
32.13
36.16
40.57
2837
2956
3080
3207
33.82
37.86
42.26
47.03
2973
3088
3206
39.29
43.68
48.44
3103
3213
44.84
49.60
3228
50.46
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
20" SP
RPM
BHP
3209
3240
44.09
47.52
Power ratings (BHP) do not include drive losses.
13
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
26-7/16 In. Wheel Diameter
4.19 Sq. Ft. Outlet Area
Peak BHP = 2.138 (RPM ÷1000) 3
Tip Speed (fpm) = 6.92 x RPM
270
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
SIZE
1809 RPM
CLASS II 2353 RPM
CLASS III 2959 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
0.45
0.75
1.20
1.82
669
757
881
1016
0.60
0.93
1.43
2.12
794
859
960
1088
0.95
1.32
1.89
2.69
954
1039
1153
1.76
2.38
3.26
1043
1117
1216
2.23
2.90
3.84
1128
1191
1280
2.75
3.46
4.45
1209
1261
1343
3.28
4.05
5.08
1330
1404
4.67
5.75
1121
1272
1426
1583
2.66
3.78
5.21
7.00
1156
1302
1453
1607
3.01
4.16
5.64
7.48
1223
1362
1506
1654
3.71
4.97
6.53
8.46
1284
1419
1558
1701
4.40
5.78
7.45
9.47
1339
1473
1608
1747
5.08
6.59
8.38
10.50
1393
1522
1656
1792
5.76
7.39
9.31
11.55
1445
1569
1701
1836
6.46
8.17
10.22
12.60
1499
1614
1743
1877
7.17
8.97
11.12
13.63
8.68
11.28
14.37
17.99
1741
1900
2061
2222
9.20
11.84
14.98
18.65
1763
1920
2079
2239
9.72
12.41
15.60
19.32
1805
1959
2115
2272
10.79
13.58
16.85
20.67
1848
1998
2151
2305
11.89
14.76
18.13
22.04
1890
2037
2186
2338
13.01
15.97
19.43
23.43
1932
2075
2222
2371
14.16
17.21
20.75
24.84
1973
2113
2257
2404
15.32
18.47
22.10
26.27
201316.48
2151 19.74
2292 23.47
2436 27.73
22.19
27.02
32.51
38.72
2383
2545
2708
2870
22.90
27.78
33.32
39.57
2399
2560
2722
2884
23.62
28.54
34.14
40.44
2430
2589
2749
2909
25.06
30.08
35.77
42.17
2461
2618
2776
2935
26.52
31.64
37.42
43.92
2492
2647
2804
28.01
33.21
39.09
2523
2676
2831
29.51
34.81
40.77
2553
2704
2857
31.03
36.42
42.48
2583
2733
2884
CFM
OV
FPM
3000
4400
5800
7200
716
1050
1384
1718
450
588
737
893
0.19
0.39
0.74
1.26
527
652
789
935
0.31
0.57
0.96
1.53
601
705
838
976
8600
10000
11400
12800
2053
2387
2721
3055
1051
1211
1372
1534
2.01
3.04
4.37
6.07
1086
1242
1400
1559
2.33
3.40
4.79
6.53
14200
15600
17000
18400
3389
3723
4057
4391
1697
1860
2024
2187
8.17
10.72
13.76
17.33
1719
1880
2042
2205
19800
21200
22600
24000
4726
5060
5394
5728
2351
2516
2680
2844
21.49
26.27
31.71
37.87
2367
2530
2694
2857
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
6000
7400
8800
10200
1432
1766
2100
2434
1467
1532
1618
1721
6.15
7.35
8.92
10.90
1589
1642
1719
1811
7.57
8.89
10.53
12.62
1703
1747
1816
1900
9.06
10.51
12.24
14.41
1849
1909
1987
12.21
14.04
16.28
2042
2087
2153
15.79
17.88
20.29
2256
2310
21.97
24.59
2417
2461
26.25
29.15
2606
33.92
2747
38.85
2881
11600
13000
14400
15800
2768
3103
3437
3771
1843
1973
2107
2243
13.29
16.08
19.26
22.83
1921
2045
2177
2311
15.15
18.13
21.55
25.40
2000
2115
2242
2374
17.06
20.20
23.82
27.91
2079
2185
2306
2435
19.04
22.30
26.11
30.41
2234
2326
2432
2552
23.20
26.69
30.76
35.41
2382
2465
2560
2667
27.66
31.31
35.60
40.53
2523
2599
2686
2783
32.41
36.21
40.67
45.82
2659
2728
2809
2898
37.39
41.36
45.96
51.31
2791
2853
2928
42.59
46.75
51.52
292047.98
17200
18600
20000
21400
4105
4439
4773
5107
2381
2521
2664
2811
26.85
31.38
36.49
42.23
2446
2584
2724
2866
29.66
34.42
39.73
45.65
2509
2645
2782
2922
32.46
37.46
43.00
49.12
2568
2703
2839
35.20
40.49
46.27
2679
2811
2945
40.63
46.42
52.75
2785
2912
46.09
52.28
2891
51.65
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
14
CLASS I
270 RA
1/4" SP
RPM
BHP
26-7/16 In. Wheel Diameter
4.19 Sq. Ft. Outlet Area
Peak BHP = 2.422 (RPM ÷1000) 3
Tip Speed (fpm) = 6.92 x RPM
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
CLASS I
32.57
38.05
44.20
43.90
1809 RPM
CLASS II 2353 RPM
CLASS III 2959 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
0.64
0.94
1.35
1.88
792
833
919
1019
1.03
1.38
1.89
2.53
934
1004
1096
1.87
2.45
3.20
1033
1082
1168
2.42
3.02
3.88
1123
1158
1235
2.99
3.64
4.57
1235
1299
4.31
5.28
1311
1361
5.03
6.00
1053
1176
1304
1435
2.56
3.42
4.49
5.81
1128
1244
1365
1491
3.31
4.28
5.45
6.87
1198
1308
1424
1544
4.09
5.16
6.44
7.96
1264
1369
1480
1596
4.88
6.06
7.45
9.07
1327
1427
1534
1647
5.68
6.97
8.46
10.20
1387
1483
1586
1695
6.50
7.89
9.49
11.33
1444
1537
1637
1743
7.33
8.83
10.53
12.48
6.84
8.69
10.87
13.41
1568
1703
1839
1976
7.41
9.31
11.54
14.13
1619
1750
1883
2017
8.56
10.56
12.89
15.59
1669
1796
1926
2057
9.75
11.85
14.28
17.07
1717
1841
1968
2097
10.96
13.16
15.68
18.58
1764
1885
2009
2135
12.20
14.49
17.12
20.11
1809
1927
2049
2173
13.44
15.84
18.57
21.66
1854
1969
2088
2210
14.70
17.21
20.04
23.23
16.35
19.71
23.52
27.82
2114
2252
2392
2531
17.12
20.53
24.39
28.74
2153
2289
2426
2564
18.68
22.19
26.16
30.60
2190
2325
2460
2596
20.26
23.87
27.94
32.49
2228
2360
2493
2628
21.86
25.58
29.74
34.39
2264
2394
2526
2659
23.49
27.30
31.57
36.32
2300
2428
2558
2690
25.14
29.05
33.41
38.26
2335
2461
2590
2720
26.81
30.81
35.28
40.22
CFM
OV
FPM
3000
4400
5800
7200
716
1050
1384
1718
420
535
661
794
0.18
0.33
0.58
0.96
508
607
720
843
0.32
0.53
0.83
1.25
583
671
775
890
0.47
0.73
1.09
1.56
657
729
826
935
8600
10000
11400
12800
2053
2387
2721
3055
929
1067
1206
1346
1.49
2.20
3.12
4.29
972
1105
1240
1376
1.83
2.59
3.57
4.79
1013
1141
1272
1406
2.19
3.00
4.03
5.30
14200
15600
17000
18400
3389
3723
4057
4391
1487
1628
1769
1911
5.73
7.48
9.56
12.00
1514
1653
1793
1933
6.28
8.08
10.21
12.70
1541
1678
1816
1955
19800
21200
22600
24000
4726
5060
5394
5728
2054
2196
2338
2481
14.83
18.09
21.80
25.99
2074
2215
2356
2498
15.59
18.90
22.66
26.90
2094
2234
2374
2515
CFM
OV
FPM
5" SP
RPM
BHP
6000
7400
8800
10200
1432
1766
2100
2434
1456
1491
1564
1653
11600
13000
14400
15800
2768
3103
3437
3771
17200
18600
20000
21400
4105
4439
4773
5107
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
6.68
7.75
9.24
10.99
1583
1612
1666
1748
8.25
9.50
11.01
12.96
1728
1766
1838
11.37
12.89
14.96
1838
1867
1926
13.30
14.93
17.01
2065
2099
19.35
21.45
2246
2273
23.95
26.39
2440
31.64
2594
36.97
2737
42.29
1748
1849
1956
2067
12.95
15.14
17.61
20.38
1839
1936
2038
2144
15.14
17.54
20.22
23.21
1925
2018
2116
2219
17.36
19.98
22.87
26.07
2007
2097
2192
2292
19.61
22.46
25.56
28.97
2164
2246
2336
2430
24.20
27.48
31.03
34.86
2316
2387
2471
2560
29.10
32.60
36.59
40.87
2469
2523
2599
2684
34.47
37.95
42.23
46.96
2621
2659
2722
2802
40.23
43.66
48.03
53.12
2767
2796
2845
2916
46.21
49.83
54.11
59.39
2182
2300
2421
2545
23.48
26.93
30.77
35.04
2255
2370
2487
2608
26.52
30.19
34.24
38.72
2327
2438
2552
2669
29.60
33.48
37.75
42.44
2396
2504
2615
2730
32.71
36.81
41.29
46.20
2529
2631
2737
2847
39.02
43.55
48.46
53.79
2654
2753
2855
45.46
50.40
55.74
2774
2869
52.00
57.37
2889
58.62
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
20" SP
RPM
BHP
2905
2931
Power ratings (BHP) do not include drive losses.
52.27
56.31
CHICAGO BLOWER CORPORATION
DESIGN 51
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
29-1/8 In. Wheel Diameter
5.17 Sq. Ft. Outlet Area
Peak BHP = 3.469 (RPM ÷1000) 3
Tip Speed (fpm) = 7.63 x RPM
300
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1663 RPM
CLASS II 2163 RPM
CLASS III 2720 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
0.79
1.23
1.89
2.76
729
797
895
1013
1.23
1.72
2.48
3.50
828
880
963
1071
1.71
2.26
3.08
4.22
958
1030
1126
2.86
3.73
4.95
1033
1096
1181
3.49
4.41
5.70
1104
1159
1236
4.16
5.14
6.48
1172
1219
1291
1076
1210
1347
1487
3.90
5.38
7.25
9.57
1136
1263
1394
1529
4.78
6.37
8.35
10.78
1191
1314
1440
1571
5.66
7.40
9.49
12.03
1240
1362
1485
1612
6.51
8.41
10.65
13.31
1288
1406
1528
1652
7.37
9.41
11.81
14.61
1334
1448
1569
1692
8.23
10.40
12.96
15.91
13819.12
148911.38
160714.08
1729 17.20
11.75
15.06
18.99
23.57
1629
1772
1916
2061
12.39
15.77
19.75
24.39
1667
1807
1949
2091
13.71
17.20
21.29
26.04
1705
1842
1981
2121
15.06
18.66
22.86
27.73
1742
1876
2012
2150
16.45
20.15
24.46
29.44
1780
1910
2044
2180
17.87
21.67
26.09
31.17
1816
1944
2075
2209
19.30
23.23
27.75
32.94
185220.75
197824.80
210729.43
2238 34.72
28.86
34.92
41.78
49.52
2207
2353
2500
2647
29.74
35.85
42.79
50.59
2235
2379
2524
2670
31.51
37.74
44.79
52.71
2263
2405
2549
2693
33.31
39.65
46.82
54.86
2290
2431
2573
2716
35.13
41.59
48.87
57.02
2318
2457
2597
36.97
43.54
50.93
2345
2482
2622
38.84
45.52
53.02
2372
2508
2646
CFM
OV
FPM
4000
5700
7400
9100
774
1103
1431
1760
434
561
698
840
0.27
0.55
1.00
1.69
499
617
743
876
0.43
0.78
1.29
2.03
562
664
786
913
0.60
1.01
1.59
2.39
621
708
825
948
10800
12500
14200
15900
2089
2418
2747
3075
984
1129
1276
1423
2.66
3.98
5.68
7.83
1015
1156
1300
1445
3.06
4.43
6.19
8.40
1046
1183
1324
1466
3.48
4.90
6.72
8.98
17600
19300
21000
22700
3404
3733
4062
4391
1571
1719
1867
2016
10.47
13.67
17.48
21.94
1590
1737
1884
2031
11.11
14.37
18.23
22.74
1610
1754
1900
2046
24400
26100
27800
29500
4720
5048
5377
5706
2164
2313
2462
2611
27.11
33.05
39.81
47.44
2179
2326
2475
2623
27.98
33.98
40.79
48.48
2193
2340
2487
2635
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
7000
8700
10400
12100
1354
1683
2012
2340
1324
1379
1454
1545
7.24
8.65
10.46
12.78
1436
1480
1547
1628
8.94
10.49
12.40
14.83
1577
1636
1711
12.44
14.46
16.99
1671
1721
1790
14.48
16.63
19.25
1847
1885
1942
18.75
21.24
24.08
2041
2087
26.15
29.26
2188
2225
31.27
34.74
2359
40.47
2487
46.38
2609
13800
15500
17200
18900
2669
2998
3327
3656
1653
1770
1892
2014
15.59
18.89
22.66
26.89
1725
1836
1955
2076
17.82
21.34
25.38
29.95
1798
1901
2015
2134
20.10
23.81
28.10
32.95
1871
1966
2074
2190
22.48
26.34
30.83
35.93
2014
2096
2190
2296
27.49
31.60
36.41
41.93
2149
2224
2308
2403
32.88
37.17
42.24
48.08
2279
2346
2424
2509
38.60
43.08
48.34
54.45
2404
2464
2536
2616
44.60
49.30
54.75
61.06
2525
2579
2645
2720
50.87
55.81
61.45
67.95
264357.36
269062.57
20600
22300
24000
25700
3985
4313
4642
4971
2139
2266
2395
2527
31.65
37.01
43.06
49.87
2199
2323
2450
2578
35.02
40.66
46.95
53.98
2256
2379
2503
2629
38.35
44.31
50.88
58.16
2310
2432
2555
2679
41.64
47.93
54.81
62.37
2411
2530
2652
48.14
55.02
62.57
2509
2623
54.69
62.06
2606
2713
61.38
69.15
2704
68.28
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
SIZE
CLASS I
300 RA
1/4" SP
RPM
BHP
29-1/8 In. Wheel Diameter
5.17 Sq. Ft. Outlet Area
Peak BHP = 3.930 (RPM ÷1000) 3
Tip Speed (fpm) = 7.63 x RPM
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
CLASS I
4.86
5.91
7.29
40.74
47.52
55.13
52.43
1663 RPM
CLASS II 2163 RPM
CLASS III 2720 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
0.84
1.23
1.76
2.43
724
771
852
944
1.33
1.79
2.44
3.24
856
927
1013
2.38
3.15
4.08
942
997
1077
3.06
3.87
4.94
1024
1063
1138
3.79
4.62
5.81
1100
1129
1195
4.54
5.43
6.69
1195
1250
978
1091
1207
1326
3.29
4.38
5.73
7.39
1044
1151
1262
1376
4.24
5.45
6.92
8.70
1107
1208
1314
1424
5.20
6.55
8.15
10.05
1166
1262
1364
1470
6.19
7.66
9.40
11.42
1223
1315
1412
1515
7.19
8.79
10.66
12.81
1276
1365
1459
1559
8.21
9.94
11.93
14.22
13289.24
141311.11
150513.23
1602
15.64
8.69
10.99
13.71
16.87
1447
1570
1693
1818
9.39
11.75
14.53
17.75
1493
1612
1733
1855
10.81
13.30
16.20
19.54
1538
1653
1771
1891
12.28
14.88
17.90
21.37
1581
1694
1809
1926
13.77
16.50
19.64
23.22
1622
1733
1846
1961
15.30
18.14
21.40
25.10
1663
1771
1882
1995
16.83
19.81
23.19
27.01
170318.39
180921.49
191724.99
2028
28.94
20.51
24.67
29.38
34.68
1943
2069
2195
2322
21.46
25.68
30.45
35.81
1978
2101
2226
2351
23.37
27.71
32.61
38.09
2012
2134
2256
2380
25.31
29.78
34.80
40.41
2045
2165
2286
2408
27.29
31.87
37.01
42.74
2078
2196
2316
2436
29.28
33.99
39.25
45.10
2110
2227
2345
2464
31.31
36.13
41.51
47.48
214133.36
225738.30
237343.80
2491
49.89
CFM
OV
FPM
4000
5700
7400
9100
774
1103
1431
1760
402
509
625
745
0.25
0.46
0.79
1.27
478
571
676
789
0.43
0.71
1.10
1.64
544
627
724
831
0.63
0.97
1.42
2.03
605
679
769
870
10800
12500
14200
15900
2089
2418
2747
3075
868
994
1120
1247
1.95
2.86
4.03
5.51
907
1027
1150
1274
2.38
3.35
4.59
6.12
943
1060
1179
1301
2.83
3.86
5.16
6.75
17600
19300
21000
22700
3404
3733
4062
4391
1375
1503
1631
1760
7.32
9.50
12.09
15.13
1399
1525
1652
1779
8.00
10.24
12.90
15.99
1424
1548
1673
1799
24400
26100
27800
29500
4720
5048
5377
5706
1889
2018
2147
2277
18.64
22.68
27.26
32.43
1907
2035
2163
2292
19.57
23.67
28.32
33.55
1925
2052
2179
2307
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
7000
8700
10400
12100
1354
1683
2012
2340
1317
1345
1407
1486
7.89
9.15
10.87
12.95
1458
1501
1573
11.27
12.99
15.29
1565
1595
1656
13.51
15.27
17.68
1664
1689
1737
15.78
17.76
20.15
1870
1898
23.07
25.54
2033
2058
28.50
31.52
2210
37.79
2350
44.12
13800
15500
17200
18900
2669
2998
3327
3656
1571
1662
1757
1857
15.27
17.87
20.79
24.07
1654
1741
1833
1929
17.88
20.74
23.92
27.46
1733
1816
1905
1997
20.53
23.66
27.09
30.89
1808
1889
1974
2064
23.21
26.61
30.31
34.36
1952
2025
2105
2190
28.73
32.61
36.86
41.43
2093
2154
2229
2309
34.66
38.75
43.51
48.63
2235
2279
2345
2422
41.19
45.22
50.28
55.94
2374
2405
2459
2530
20600
22300
24000
25700
3985
4313
4642
4971
1961
2068
2177
2289
27.74
31.83
36.38
41.43
2028
2132
2238
2347
31.38
35.74
40.55
45.85
2094
2194
2297
2403
35.08
39.69
44.76
50.33
2157
2254
2355
2458
38.81
43.68
49.01
54.84
2279
2371
2467
2566
46.39
51.78
57.63
63.98
2394
2482
2574
2669
54.11
60.01
66.38
73.25
2503
2588
2676
61.96
68.38
75.26
2608
2689
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
6.30
7.59
18" SP
RPM
BHP
20" SP
RPM
BHP
48.14
52.19
57.28
63.32
2507
2532
2572
2634
55.30
59.66
64.65
70.86
263262.53
265567.48
268672.51
69.90
76.87
2708
77.91
Power ratings (BHP) do not include drive losses.
15
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
32-3/8 In. Wheel Diameter
6.26 Sq. Ft. Outlet Area
Peak BHP = 6.183 (RPM ÷1000) 3
Tip Speed (fpm) = 8.48 x RPM
330
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1433 RPM
CLASS II 1863 RPM
CLASS III 2344 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
3.77
4.63
5.95
998
1052
5.46
6.82
1058
1104
1073
1161
1257
1359
7.64
9.68
12.11
15.00
1121
1203
1295
1394
8.62
10.80
13.38
16.41
11699.63
124511.93
133314.65
1428
17.83
16.86
20.69
25.16
30.33
1464
1573
1683
1795
18.39
22.35
26.95
32.25
1497
1603
1712
1822
19.94
24.04
28.76
34.18
152921.50
163325.74
174030.60
1849
36.15
36.25
42.97
50.57
59.09
1909
2024
2139
2256
38.29
45.15
52.87
61.52
1934
2048
2162
2278
40.36
47.34
55.20
63.98
195942.45
207249.56
218557.54
2300
66.45
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
39.87
43.67
2094
2116
46.78
50.82
2233
58.40
2044
2105
2171
2243
48.62
54.59
61.42
68.99
2153
2207
2270
2338
55.71
61.84
69.01
77.04
2261
2307
63.28
69.45
2321
77.31
CFM
OV
FPM
4000
6000
8000
10000
639
958
1278
1597
333
435
546
662
0.23
0.48
0.90
1.55
405
487
589
698
0.39
0.71
1.20
1.92
469
536
629
732
0.58
0.95
1.51
2.30
529
584
666
764
0.79
1.20
1.83
2.69
672
739
826
1.74
2.48
3.48
754
810
884
2.34
3.16
4.28
833
875
942
3.03
3.87
5.11
906
937
999
12000
14000
16000
18000
1917
2236
2556
2875
781
901
1022
1143
2.49
3.78
5.47
7.62
812
928
1046
1165
2.92
4.28
6.04
8.25
841
954
1070
1187
3.37
4.79
6.61
8.89
870
980
1093
1208
3.82
5.31
7.19
9.54
924
1028
1136
1248
4.76
6.37
8.39
10.87
975
1074
1178
1286
5.70
7.46
9.61
12.22
1024
1118
1218
1323
6.66
8.56
10.86
13.60
20000
22000
24000
26000
3195
3514
3834
4153
1266
1389
1512
1635
10.29
13.54
17.42
22.00
1286
1407
1528
1650
10.99
14.31
18.26
22.90
1305
1425
1545
1666
11.70
15.08
19.10
23.80
1324
1442
1561
1681
12.41
15.86
19.94
24.72
1361
1476
1593
1710
13.86
17.44
21.66
26.56
1397
1509
1624
1739
15.35
19.05
23.40
28.43
1431
1541
1654
1768
28000
30000
32000
34000
4473
4792
5112
5431
1758
1882
2005
2129
27.32
33.45
40.44
48.36
1773
1895
2018
2141
28.29
34.49
41.55
49.53
1787
1909
2031
2153
29.26
35.53
42.66
50.71
1801
1922
2043
2165
30.24
36.57
43.77
51.89
1829
1948
2068
2188
32.22
38.69
46.02
54.27
1856
1974
2092
2211
34.22
40.82
48.28
56.67
1883
1999
2116
2234
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
10000
12000
14000
16000
1597
1917
2236
2556
1202
1259
1328
1406
9.68
11.71
14.25
17.23
1299
1344
1408
1479
11.84
13.90
16.62
19.85
1393
1426
1484
1551
14.18
16.24
19.07
22.53
1482
1507
1556
1620
16.64
18.75
21.63
25.26
1665
1697
1751
24.28
27.14
30.96
1812
1835
1875
30.19
33.24
37.07
1968
1996
18000
20000
22000
24000
2875
3195
3514
3834
1495
1591
1691
1794
20.68
24.65
29.17
34.31
1561
1651
1747
1847
23.57
27.82
32.63
38.06
1625
1710
1802
1899
26.50
31.02
36.12
41.83
1690
1769
1856
1949
29.48
34.26
39.63
45.63
1815
1885
1963
2048
35.58
40.85
46.75
53.30
1932
1998
2068
2146
41.93
47.61
54.00
61.08
26000
28000
30000
32000
4153
4473
4792
5112
1900
2008
2118
2229
40.12
46.68
54.05
62.29
1950
2056
2163
2273
44.15
50.98
58.61
67.10
1999
2102
2208
2315
48.22
55.33
63.22
71.98
2047
2148
2251
52.30
59.70
67.88
2140
2236
2335
60.54
68.52
77.28
2231
2322
68.87
77.41
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
330 RA
CFM
16
CLASS I
OV
FPM
1/4" SP
RPM
BHP
32-3/8 In. Wheel Diameter
6.26 Sq. Ft. Outlet Area
Peak BHP = 6.569 (RPM ÷1000) 3
Tip Speed (fpm) = 8.48 x RPM
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
CLASS I
6.35
7.73
1433 RPM
CLASS II 1863 RPM
CLASS III 2344 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
4000
6000
8000
10000
639
958
1278
1597
324
410
504
605
0.22
0.42
0.73
1.20
400
471
558
650
0.41
0.68
1.07
1.61
471
526
604
693
0.64
0.96
1.42
2.04
539
576
647
731
0.89
1.25
1.78
2.47
671
728
801
1.88
2.54
3.37
765
800
867
2.62
3.31
4.30
870
928
4.15
5.25
942
986
5.10
6.22
1013
1042
6.11
7.23
10787.14
1098
8.31
12000
14000
16000
18000
1917
2236
2556
2875
710
817
925
1034
1.86
2.75
3.91
5.38
747
849
953
1059
2.34
3.31
4.54
6.09
785
881
981
1084
2.85
3.88
5.19
6.80
820
913
1009
1108
3.36
4.47
5.85
7.54
884
973
1064
1158
4.40
5.67
7.20
9.03
943
1027
1116
1207
5.48
6.89
8.57
10.56
999
1078
1164
1253
6.58
8.13
9.97
12.11
1053
1127
1209
1296
7.71
9.41
11.38
13.67
1104
1174
1252
1336
8.84
10.70
12.82
15.25
11539.99
122112.02
129514.28
1376 16.86
20000
22000
24000
26000
3195
3514
3834
4153
1144
1254
1364
1475
7.20
9.41
12.04
15.13
1166
1274
1383
1492
7.98
10.26
12.96
16.13
1188
1294
1401
1509
8.77
11.12
13.90
17.14
1210
1315
1420
1526
9.57
12.00
14.85
18.16
1255
1355
1457
1561
11.21
13.78
16.77
20.23
1300
1396
1494
1595
12.89
15.60
18.74
22.34
1344
1437
1532
1630
14.59
17.46
20.74
24.48
1385
1476
1569
1664
16.31
19.33
22.76
26.66
1424
1514
1605
1698
18.04
21.22
24.81
28.85
146219.79
155023.12
164026.87
1732 31.06
28000
30000
32000
34000
4473
4792
5112
5431
1586
1697
1808
1919
18.73
22.86
27.58
32.92
1602
1712
1822
1932
19.81
24.02
28.81
34.22
1618
1727
1836
1946
20.89
25.18
30.04
35.53
1634
1742
1850
1959
21.98
26.34
31.28
36.84
1665
1771
1878
1985
24.20
28.70
33.79
39.49
1697
1801
1906
2011
26.45
31.10
36.33
42.18
1729
1831
1933
2037
28.73
33.52
38.89
44.89
1761
1861
1961
2064
31.05
35.98
41.50
47.63
1794
1891
1989
2090
33.39
38.47
44.12
50.41
182535.75
192140.98
201846.78
2116 53.20
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
10000
12000
14000
16000
1597
1917
2236
2556
1214
1246
1308
1377
10.73
12.39
14.67
17.26
1323
1341
1390
1455
13.30
15.03
17.39
20.29
1438
1470
1529
17.94
20.25
23.35
1531
1551
1600
21.00
23.33
26.48
1716
1740
30.16
33.20
1869
1885
37.35
40.76
2026
48.86
2157
57.09
18000
20000
22000
24000
2875
3195
3514
3834
1452
1533
1618
1707
20.13
23.35
26.96
31.01
1526
1601
1683
1768
23.47
26.97
30.88
35.22
1596
1668
1746
1828
26.86
30.67
34.86
39.48
1664
1733
1807
1885
30.28
34.42
38.90
43.81
1792
1856
1925
1998
37.26
42.00
47.13
52.64
1917
1971
2036
2105
44.68
49.74
55.49
61.64
2044
2084
2142
2208
52.85
57.84
63.96
70.75
2172
2197
2244
2305
61.69
66.52
72.72
79.95
26000
28000
30000
32000
4153
4473
4792
5112
1796
1887
1980
2074
35.52
40.53
46.06
52.15
1856
1946
2037
2129
40.03
45.34
51.18
57.59
1913
2001
2091
2182
44.58
50.20
56.35
63.07
1968
2055
2143
2232
49.20
55.10
61.55
68.58
2075
2156
2241
2327
58.59
65.07
72.10
79.72
2177
2254
2334
68.20
75.24
82.85
2277
77.96
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
2296
2313
70.87
75.93
Power ratings (BHP) do not include drive losses.
CHICAGO BLOWER CORPORATION
DESIGN 51
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
35-9/16 In. Wheel Diameter
7.66 Sq. Ft. Outlet Area
Peak BHP = 9.889 (RPM ÷1000) 3
Tip Speed (fpm) = 9.31 x RPM
365
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1318 RPM
CLASS II 1715 RPM
CLASS III 2157 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
5000
7500
10000
12500
653
979
1305
1632
309
406
512
621
0.29
0.62
1.17
2.04
373
453
550
653
0.50
0.91
1.55
2.50
430
496
585
684
0.72
1.21
1.94
2.97
483
539
618
712
0.98
1.52
2.34
3.45
582
617
683
767
1.59
2.18
3.14
4.44
690
746
818
2.91
3.98
5.44
760
805
870
3.74
4.85
6.46
827
860
920
4.65
5.78
7.51
914
968
6.78
8.58
967
1014
7.85
9.69
15000
17500
20000
22500
1958
2285
2611
2937
733
847
961
1076
3.29
5.00
7.25
10.12
761
871
982
1095
3.83
5.62
7.96
10.91
787
894
1003
1114
4.38
6.26
8.67
11.71
812
917
1024
1132
4.95
6.90
9.40
12.51
860
960
1062
1168
6.11
8.23
10.88
14.16
906
1000
1100
1202
7.29
9.59
12.41
15.84
949
1040
1135
1235
8.48
10.96
13.96
17.56
992
1078
1170
1267
9.69
12.34
15.52
19.30
1035
1115
1204
1298
10.92
13.74
17.10
21.05
1077
1152
1237
1329
12.16
15.15
18.68
22.82
25000
27500
30000
32500
3264
3590
3916
4243
1191
1307
1423
1539
13.68
18.01
23.18
29.28
1209
1323
1438
1553
14.55
18.96
24.22
30.41
1226
1339
1452
1566
15.43
19.93
25.27
31.54
1243
1354
1467
1580
16.32
20.90
26.33
32.68
1275
1384
1495
1606
18.13
22.87
28.46
34.98
1307
1414
1522
1631
19.97
24.87
30.63
37.31
1337
1442
1549
1656
21.85
26.91
32.82
39.66
1367
1470
1575
1681
23.75
28.97
35.05
42.05
1396
1497
1600
1705
25.68
31.07
37.30
44.46
1425
1524
1625
1728
27.63
33.18
39.58
46.89
35000
37500
40000
42500
4569
4896
5222
5548
1655
1772
1888
2005
36.38
44.56
53.88
64.44
1668
1784
1900
2016
37.59
45.85
55.26
65.91
1681
1796
1911
2026
38.81
47.15
56.65
67.38
1693
1807
1922
2036
40.03
48.46
58.04
68.85
1718
1830
1943
2057
42.49
51.09
60.84
71.82
1742
1853
1965
2077
44.99
53.75
63.66
74.81
1765
1875
1986
2097
47.51
56.43
66.51
77.82
1788
1897
2007
2117
50.05
59.14
69.38
80.86
1811
1918
2027
2136
52.62
61.87
72.27
83.91
1833
1940
2047
2156
55.22
64.62
75.19
86.99
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
10000
12500
15000
17500
1305
1632
1958
2285
1070
1102
1159
1225
10.20
12.05
14.72
18.02
1164
1187
1235
1296
12.69
14.64
17.40
20.95
1271
1308
1365
17.49
20.24
23.97
1352
1379
1430
20.50
23.26
27.10
1520
1555
29.93
33.77
1653
1677
37.19
41.10
1796
49.14
1910
57.62
2018
66.35
20000
22500
25000
27500
2611
2937
3264
3590
1302
1388
1480
1575
21.89
26.38
31.54
37.46
1366
1446
1533
1625
25.14
29.97
35.50
41.77
1430
1503
1585
1674
28.46
33.62
39.48
46.12
1492
1560
1637
1722
31.83
37.31
43.51
50.49
1609
1671
1739
1816
38.83
44.84
51.69
59.34
1720
1777
1840
1909
46.25
52.65
60.05
68.34
1827
1877
1936
2001
54.22
60.80
68.63
77.51
1934
1974
2028
2090
62.80
69.40
77.52
86.88
2038
2069
2117
71.99
78.51
86.77
30000
32500
35000
37500
3916
4243
4569
4896
1674
1774
1877
1981
44.19
51.84
60.48
70.20
1721
1819
1919
2021
48.86
56.85
65.82
75.87
1767
1862
1960
2061
53.57
61.91
71.23
81.60
1811
1905
2001
2099
58.30
67.01
76.68
87.40
1899
1987
2079
67.84
77.27
87.65
1985
2068
2155
77.52
87.63
98.74
2070
2147
87.32
98.12
2155
97.30
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
SIZE
CLASS I
365 RA
1/4" SP
RPM
BHP
35-9/16 In. Wheel Diameter
7.66 Sq. Ft. Outlet Area
Peak BHP = 10.507 (RPM ÷1000) 3
Tip Speed (fpm) = 9.31 x RPM
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
CLASS I
20" SP
RPM
BHP
2139
81.60
1318 RPM
CLASS II 1715 RPM
CLASS III 2157 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
5000
7500
10000
12500
653
979
1305
1632
300
382
471
567
0.3
0.5
0.9
1.6
368
437
519
607
0.5
0.9
1.4
2.1
430
486
561
645
0.8
1.2
1.8
2.6
492
531
599
679
1.1
1.6
2.3
3.1
614
671
741
2.3
3.2
4.3
698
736
800
3.2
4.1
5.4
775
798
855
4.2
5.2
6.6
860
907
6.3
7.8
924
957
7.5
9.0
984
1006
8.8
10.3
15000
17500
20000
22500
1958
2285
2611
2937
666
767
869
972
2.4
3.6
5.2
7.1
699
795
894
994
3.0
4.3
5.9
8.0
732
823
918
1016
3.7
5.0
6.7
8.9
764
852
943
1038
4.3
5.8
7.6
9.8
821
906
992
1081
5.6
7.2
9.2
11.6
874
954
1039
1125
6.9
8.8
11.0
13.5
923
1000
1081
1166
8.3
10.3
12.7
15.5
972
1043
1122
1205
9.7
11.9
14.4
17.4
1018
1086
1161
1241
11.1
13.5
16.2
19.4
1061
1127
1198
1276
12.5
15.1
18.0
21.4
25000
27500
30000
32500
3264
3590
3916
4243
1076
1179
1283
1388
9.5
12.4
15.9
20.0
1095
1197
1300
1403
10.5
13.5
17.1
21.3
1115
1215
1316
1418
11.5
14.6
18.3
22.6
1134
1233
1333
1433
12.5
15.7
19.4
23.8
1174
1269
1365
1463
14.5
17.9
21.8
26.4
1213
1304
1398
1493
16.6
20.2
24.3
29.0
1252
1340
1431
1524
18.7
22.5
26.8
31.7
1289
1376
1464
1554
20.9
24.8
29.3
34.4
1324
1410
1496
1585
23.0
27.1
31.8
37.1
1358
1442
1528
1614
25.2
29.5
34.4
39.9
35000
37500
40000
42500
4569
4896
5222
5548
1492
1597
1702
1806
24.8
30.3
36.6
43.7
1506
1610
1714
1818
26.2
31.8
38.1
45.3
1520
1623
1726
1830
27.5
33.2
39.7
46.9
1534
1636
1739
1841
28.9
34.7
41.2
48.6
1562
1662
1763
1864
31.6
37.6
44.3
51.9
1590
1689
1788
1887
34.4
40.6
47.5
55.2
1618
1715
1812
1911
37.3
43.6
50.7
58.6
1647
1741
1837
1934
40.2
46.7
53.9
62.0
1675
1767
1861
1957
43.1
49.7
57.2
65.5
1703
1794
1886
1980
46.0
52.9
60.5
68.9
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
12500
15000
17500
20000
1632
1958
2285
2611
1107
1145
1205
1272
13.2
15.5
18.4
21.7
1206
1227
1279
1342
16.4
18.6
21.8
25.5
1296
1312
1349
1408
19.6
22.1
25.3
29.3
1396
1420
1472
25.9
29.0
33.2
1550
1565
1595
33.6
37.2
41.3
1705
1721
46.1
50.3
1831
1847
55.1
60.2
1967
70.5
2078
80.8
22500
25000
27500
30000
2937
3264
3590
3916
1344
1422
1503
1587
25.4
29.6
34.3
39.6
1410
1483
1561
1643
29.6
34.1
39.2
44.8
1473
1542
1617
1696
33.8
38.7
44.1
50.1
1534
1600
1671
1747
38.0
43.3
49.1
55.4
1649
1711
1777
1847
46.7
52.8
59.3
66.4
1758
1814
1877
1943
55.7
62.3
69.7
77.6
1869
1914
1972
2035
65.4
72.2
80.2
88.9
1982
2012
2063
2123
76.1
82.7
91.0
100.3
2094
2113
2153
87.4
93.9
102.1
32500
35000
37500
40000
4243
4569
4896
5222
1672
1758
1846
1935
45.4
52.0
59.2
67.2
1726
1811
1897
1984
51.0
58.0
65.6
73.9
1778
1861
1946
2032
56.7
64.0
72.0
80.8
1827
1909
1992
2077
62.4
70.1
78.5
87.6
1921
1999
2080
74.1
82.5
91.6
2013
2086
86.0
95.1
2101
98.1
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
20" SP
RPM
BHP
Power ratings (BHP) do not include drive losses.
17
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
39-3/8 In. Wheel Diameter
9.31 Sq. Ft. Outlet Area
Peak BHP = 17.968 (RPM ÷1000) 3
Tip Speed (fpm) = 10.31 x RPM
402
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
SIZE
1141 RPM
CLASS II 1483 RPM
CLASS III 1866 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
8000
11000
14000
17000
859
1182
1504
1826
321
407
499
594
0.6
1.1
2.0
3.2
369
446
529
619
0.9
1.5
2.5
3.8
412
481
560
644
1.2
2.0
3.0
4.4
453
514
590
670
1.6
2.4
3.6
5.1
527
576
642
718
2.3
3.3
4.8
6.5
597
635
692
762
3.2
4.3
5.9
7.9
661
689
740
803
4.1
5.3
7.0
9.3
741
787
844
6.3
8.2
10.7
792
830
884
7.5
9.4
12.1
842
873
923
8.8
10.7
13.5
20000
23000
26000
29000
2148
2470
2793
3115
690
788
886
985
5.0
7.4
10.4
14.2
711
806
902
999
5.7
8.1
11.3
15.2
733
825
919
1014
6.4
8.9
12.1
16.1
755
843
935
1029
7.1
9.7
13.0
17.1
798
881
968
1058
8.7
11.5
14.9
19.1
839
919
1002
1088
10.3
13.3
16.9
21.3
877
955
1035
1118
12.0
15.2
19.0
23.5
913
989
1067
1148
13.7
17.1
21.1
25.8
948
1021
1098
1177
15.3
19.0
23.2
28.2
983
1052
1127
1205
16.9
20.9
25.4
30.6
32000
35000
38000
41000
3437
3759
4082
4404
1084
1183
1282
1382
18.9
24.5
31.2
39.0
1097
1195
1294
1392
19.9
25.7
32.4
40.3
1110
1207
1305
1403
21.0
26.8
33.6
41.6
1124
1219
1316
1413
22.0
27.9
34.8
42.9
1150
1244
1338
1434
24.2
30.3
37.4
45.6
1177
1268
1360
1454
26.5
32.7
39.9
48.3
1204
1292
1383
1475
28.9
35.2
42.6
51.2
1231
1317
1406
1496
31.3
37.8
45.4
54.1
1259
1342
1429
1517
33.9
40.5
48.2
57.0
1285
1367
1452
1538
36.5
43.3
51.1
60.1
44000
47000
50000
53000
4726
5048
5371
5693
1482
1581
1681
1781
47.9
58.2
69.9
83.1
1491
1591
1690
1789
49.3
59.7
71.5
84.7
1501
1600
1698
1797
50.7
61.2
73.1
86.4
1511
1609
1707
1805
52.2
62.7
74.7
88.1
1530
1627
1724
1821
55.0
65.8
77.9
91.5
1549
1645
1741
1837
57.9
68.8
81.1
94.9
1568
1663
1758
1853
60.9
72.0
84.5
98.4
1588
1681
1774
64.0
75.2
87.8
1607
1699
1791
67.1
78.5
91.3
1627
1717
1808
70.3
81.8
94.8
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
15000
18000
21000
24000
1611
1933
2256
2578
966
1014
1071
1135
14.3
17.5
21.6
26.3
1042
1082
1134
1193
17.4
20.7
25.0
30.2
1117
1147
1195
1250
20.7
24.1
28.6
34.1
1187
1210
1253
1305
24.2
27.6
32.2
38.0
1335
1364
1409
35.4
40.1
46.2
1452
1472
1508
43.8
48.8
55.0
1578
1603
58.1
64.4
1678
1698
67.9
74.5
1790
85.2
27000
30000
33000
36000
2900
3222
3545
3867
1208
1284
1363
1443
31.5
37.4
44.0
51.6
1260
1333
1410
1489
36.0
42.4
49.5
57.5
1312
1381
1455
1533
40.4
47.3
55.0
63.4
1363
1428
1499
1574
44.8
52.2
60.4
69.4
1462
1520
1584
1654
53.6
62.0
71.3
81.3
1556
1610
1668
1732
62.7
71.8
82.0
93.1
1645
1695
1750
1809
72.3
81.8
92.7
104.8
1731
1777
1828
82.5
92.2
103.6
1816
1856
93.2
103.2
39000
42000
45000
48000
4189
4511
4834
5156
1525
1609
1695
1783
60.1
69.8
80.7
92.9
1569
1651
1734
1820
66.4
76.4
87.6
100.2
1611
1691
1773
1856
72.8
83.2
94.8
107.7
1652
1731
1811
79.2
90.1
102.1
1728
1805
92.2
104.0
1801
105.1
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
18
CLASS I
402 RA
1/4" SP
RPM
BHP
39-3/8 In. Wheel Diameter
9.31 Sq. Ft. Outlet Area
Peak BHP = 17.482 (RPM ÷1000) 3
Tip Speed (fpm) = 10.31 x RPM
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
CLASS I
20" SP
RPM
BHP
1141 RPM
CLASS II 1483 RPM
CLASS III 1866 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
8000
11000
14000
17000
859
1182
1504
1826
315
392
475
561
0.5
0.9
1.6
2.5
368
438
514
593
0.9
1.4
2.1
3.2
416
477
549
625
1.3
1.9
2.7
3.9
459
515
582
655
1.7
2.4
3.4
4.6
546
583
641
709
2.6
3.4
4.6
6.1
625
645
697
758
3.6
4.5
5.9
7.6
708
748
806
5.8
7.3
9.2
771
797
851
7.2
8.7
10.8
829
846
893
8.6
10.2
12.4
897
934
11.8
14.1
20000
23000
26000
29000
2148
2470
2793
3115
650
740
831
922
3.7
5.3
7.4
10.0
677
764
852
941
4.5
6.3
8.5
11.2
705
787
872
959
5.3
7.2
9.5
12.3
732
811
893
978
6.2
8.1
10.6
13.5
782
858
935
1016
7.9
10.1
12.7
15.9
827
901
976
1053
9.6
12.1
14.9
18.3
870
940
1014
1090
11.4
14.1
17.2
20.8
911
978
1050
1124
13.3
16.1
19.4
23.3
951
1014
1083
1156
15.1
18.2
21.7
25.8
989
1050
1116
1187
17.0
20.3
24.1
28.3
32000
35000
38000
41000
3437
3759
4082
4404
1014
1106
1198
1290
13.2
17.1
21.6
26.8
1031
1121
1212
1304
14.5
18.4
23.0
28.4
1048
1137
1226
1317
15.7
19.8
24.5
30.0
1065
1152
1241
1330
17.0
21.1
26.0
31.6
1099
1183
1269
1356
19.6
24.0
29.0
34.8
1133
1214
1298
1383
22.3
26.8
32.1
38.1
1167
1246
1327
1409
25.0
29.8
35.2
41.5
1199
1277
1355
1436
27.7
32.7
38.4
44.9
1231
1307
1384
1463
30.4
35.7
41.6
48.3
1261
1336
1412
1489
33.2
38.7
44.9
51.8
44000
47000
50000
53000
4726
5048
5371
5693
1383
1475
1568
1661
32.9
39.8
47.7
56.6
1395
1487
1579
1671
34.6
41.6
49.6
58.6
1408
1499
1590
1682
36.3
43.5
51.6
60.7
1420
1510
1601
1692
38.0
45.3
53.5
62.7
1445
1533
1623
1712
41.5
49.0
57.4
66.8
1469
1556
1644
1733
45.0
52.7
61.3
71.0
1494
1579
1666
1753
48.5
56.5
65.3
75.2
1519
1602
1688
1774
52.1
60.3
69.4
79.4
1544
1626
1709
1794
55.8
64.1
73.4
83.7
1568
1649
1731
1815
59.5
68.1
77.5
88.1
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
15000
18000
21000
24000
1611
1933
2256
2578
999
1028
1080
1139
16.0
18.6
22.1
26.0
1088
1105
1147
1202
19.8
22.5
26.1
30.5
1169
1183
1212
1263
23.7
26.8
30.3
35.1
1259
1278
1321
31.3
34.9
39.7
1397
1412
1435
40.6
45.0
49.7
1538
1551
55.8
60.8
1667
72.9
1775
85.2
27000
30000
33000
36000
2900
3222
3545
3867
1202
1270
1341
1415
30.3
35.2
40.7
46.9
1262
1326
1394
1466
35.3
40.6
46.6
53.2
1319
1380
1445
1514
40.4
46.2
52.5
59.6
1375
1433
1495
1561
45.5
51.8
58.6
66.0
1479
1534
1591
1652
55.9
63.1
70.9
79.2
1581
1628
1683
1740
66.9
74.7
83.4
92.7
1683
1719
1769
1824
79.0
86.7
96.1
106.3
1788
1810
1852
92.0
99.5
109.1
39000
42000
45000
48000
4189
4511
4834
5156
1490
1566
1643
1722
53.8
61.4
69.8
79.2
1539
1614
1690
1767
60.5
68.6
77.5
87.3
1586
1659
1734
1810
67.3
75.9
85.3
95.5
1631
1703
1777
1851
74.2
83.2
93.0
103.8
1717
1786
1857
88.3
98.1
108.8
1801
1865
102.6
113.3
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
18" SP
RPM
BHP
20" SP
RPM
BHP
Power ratings (BHP) do not include drive losses.
CHICAGO BLOWER CORPORATION
DESIGN 51
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
43-7/16 In. Wheel Diameter
11.390 Sq. Ft. Outlet Area
Peak BHP = 29.360 (RPM ÷1000) 3
Tip Speed (fpm) = 11.37 x RPM
445
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
1043 RPM
CLASS II 1360 RPM
CLASS III 1706 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
9000
13000
17000
21000
790
1141
1493
1844
277
360
451
545
0.6
1.2
2.4
4.1
321
396
479
568
1.0
1.8
3.0
4.8
363
429
507
590
1.3
2.3
3.7
5.6
401
459
533
613
1.7
2.8
4.4
6.4
472
517
581
657
2.6
3.9
5.8
8.1
538
570
626
696
3.6
5.0
7.2
9.9
620
670
733
6.2
8.5
11.6
669
712
770
7.5
9.9
13.3
716
752
806
8.9
11.4
15.0
761
790
841
10.4
13.0
16.7
25000
29000
33000
37000
2195
2546
2897
3248
641
739
836
934
6.6
9.9
14.3
19.8
660
755
850
947
7.4
10.8
15.3
21.0
679
771
864
960
8.3
11.8
16.4
22.2
698
787
879
972
9.2
12.8
17.6
23.4
737
820
907
997
11.1
15.0
19.9
26.0
773
853
936
1023
13.2
17.3
22.4
28.7
807
885
966
1049
15.2
19.7
25.0
31.5
839
915
994
1075
17.3
22.0
27.7
34.4
870
944
1022
1101
19.4
24.4
30.4
37.4
901
972
1048
1126
21.4
26.8
33.1
40.4
41000
45000
49000
53000
3600
3951
4302
4653
1033
1131
1230
1329
26.7
35.0
44.9
56.5
1044
1142
1240
1338
28.0
36.4
46.4
58.2
1056
1152
1249
1347
29.3
37.9
48.0
59.9
1067
1162
1259
1356
30.7
39.3
49.6
61.6
1090
1183
1278
1373
33.4
42.3
52.8
65.0
1113
1204
1297
1391
36.3
45.4
56.1
68.6
1136
1225
1316
1408
39.3
48.6
59.5
72.2
1159
1246
1335
1426
42.4
51.9
63.0
75.8
1183
1268
1355
1444
45.6
55.3
66.5
79.6
1206
1289
1374
1462
48.9
58.7
70.2
83.5
57000
61000
65000
5004
5356
5707
1428
1527
1626
70.0
85.5
103.2
1436
1535
1633
71.8
87.4
105.2
1445
1543
1641
73.6
89.4
107.3
1453
1550
1648
75.5
91.3
109.4
1469
1566
1662
79.1
95.3
113.6
1485
1581
1677
82.9
99.3
117.8
1502
1596
1691
86.7
103.3
122.0
1518
1611
1705
90.6
107.4
126.4
1535
1627
94.6
111.6
1551
1642
98.6
115.8
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
17000
21000
25000
29000
1493
1844
2195
2546
865
907
962
1025
16.4
20.3
25.5
31.6
938
970
1020
1078
20.1
24.1
29.6
36.3
1006
1031
1076
1130
24.0
28.1
33.8
41.0
1090
1129
1180
32.5
38.3
45.8
1206
1231
1275
41.9
47.8
55.7
1312
1331
1364
51.8
58.4
66.4
1428
1452
69.7
77.9
1518
1538
81.4
90.2
1622
103.2
1702
33000
37000
41000
45000
2897
3248
3600
3951
1097
1173
1252
1332
38.6
46.5
55.6
65.9
1144
1218
1294
1373
44.0
52.6
62.3
73.3
1191
1260
1335
1412
49.4
58.7
69.1
80.7
1237
1302
1374
1449
54.8
64.9
75.9
88.1
1327
1385
1450
1521
65.5
76.9
89.4
103.1
1412
1466
1525
1590
76.7
88.9
102.7
117.9
1492
1543
1598
1658
88.4
101.2
116.0
132.5
1570
1616
1668
100.8
114.0
129.5
1647
1687
113.9
127.3
49000
53000
57000
61000
4302
4653
5004
5356
1414
1498
1585
1673
77.8
91.5
107.0
124.6
1453
1535
1619
1705
85.7
99.7
115.7
133.6
1491
1571
1653
93.7
108.3
124.6
1527
1606
1686
101.8
116.9
133.8
1595
1672
118.0
134.4
1660
134.2
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
SIZE
CLASS I
445 RA
1/4" SP
RPM
BHP
43-7/16 In. Wheel Diameter
11.390 Sq. Ft. Outlet Area
Peak BHP = 27.486 (RPM ÷1000) 3
Tip Speed (fpm) = 11.37 x RPM
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
CLASS I
116.6
1043 RPM
CLASS II 1360 RPM
CLASS III 1706 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
9000
13000
17000
21000
790
1141
1493
1844
281
360
446
535
0.6
1.2
2.1
3.5
333
402
481
565
1.0
1.7
2.8
4.4
381
440
513
592
1.5
2.3
3.6
5.3
425
475
543
619
2.0
3.0
4.4
6.2
506
542
599
668
3.3
4.3
5.9
8.1
604
652
714
5.9
7.6
10.0
662
702
758
7.6
9.4
12.0
718
750
801
9.5
11.4
14.1
797
842
13.5
16.3
842
882
15.7
18.6
25000
29000
33000
37000
2195
2546
2897
3248
626
718
812
905
5.4
8.0
11.4
15.7
652
741
832
923
6.5
9.2
12.8
17.2
676
763
851
941
7.5
10.5
14.2
18.8
699
784
870
958
8.6
11.7
15.6
20.4
743
823
906
992
10.9
14.3
18.5
23.5
785
861
941
1023
13.1
16.9
21.4
26.8
825
897
974
1054
15.4
19.5
24.3
30.1
863
932
1006
1084
17.7
22.1
27.3
33.4
900
966
1037
1113
20.1
24.7
30.2
36.7
936
999
1068
1141
22.5
27.4
33.2
40.0
41000
45000
49000
53000
3600
3951
4302
4653
999
1093
1188
1283
21.0
27.3
34.9
43.8
1016
1109
1202
1296
22.7
29.2
36.9
46.0
1032
1124
1216
1309
24.4
31.1
39.0
48.2
1048
1138
1230
1321
26.1
33.0
41.0
50.4
1079
1167
1256
1346
29.6
36.8
45.2
54.9
1108
1194
1282
1370
33.2
40.7
49.3
59.4
1137
1221
1307
1394
36.8
44.6
53.6
63.9
1164
1247
1331
1417
40.4
48.5
57.8
68.5
1191
1272
1355
1439
44.1
52.5
62.2
73.1
1217
1297
1378
1461
47.7
56.5
66.5
77.8
57000
61000
65000
69000
5004
5356
5707
6058
1378
1473
1568
1663
54.2
66.0
79.5
94.8
1390
1484
1579
1673
56.5
68.5
82.2
97.6
1402
1495
1589
1683
58.9
71.0
84.9
100.4
1414
1507
1600
1693
61.2
73.6
87.5
103.3
1437
1529
1620
66.0
78.6
92.9
1460
1550
1641
70.8
83.8
98.4
1482
1571
1661
75.7
89.0
103.9
1504
1592
1680
80.6
94.2
109.4
1525
1612
1700
85.5
99.4
115.0
1546
1632
90.5
104.7
CFM
OV
FPM
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
17000
21000
25000
29000
1493
1844
2195
2546
928
959
1005
1062
20.6
23.6
27.7
33.0
1033
1071
1123
29.0
33.3
38.8
1103
1136
1181
34.9
39.2
45.0
1170
1199
1239
41.1
45.6
51.5
1318
1349
59.4
65.4
1429
1455
74.5
80.8
1556
97.4
1651
114.9
33000
37000
41000
45000
2897
3248
3600
3951
1126
1196
1269
1345
39.3
46.6
55.0
64.6
1182
1248
1318
1391
45.5
53.4
62.4
72.6
1237
1299
1366
1436
52.0
60.3
69.9
80.7
1289
1348
1412
1480
58.8
67.4
77.5
88.8
1392
1443
1502
1565
73.1
82.4
93.2
105.5
1490
1535
1587
1646
88.6
98.3
109.7
122.8
1585
1624
1671
105.4
115.3
127.2
1676
123.3
49000
53000
57000
61000
4302
4653
5004
5356
1424
1504
1587
1671
75.2
87.2
100.5
115.4
1467
1546
1626
84.0
96.6
110.6
1510
1586
1665
92.7
106.1
120.8
1552
1626
1703
101.5
115.5
131.0
1632
1703
119.3
134.6
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
18" SP
RPM
BHP
20" SP
RPM
BHP
Power ratings (BHP) do not include drive losses.
19
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
48 In. Wheel Diameter
13.80 Sq. Ft. Outlet Area
Peak BHP = 48.374 (RPM ÷1000) 3
Tip Speed (fpm) = 12.57 x RPM
490
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
SIZE
939 RPM
CLASS II 1224 RPM
CLASS III 1535 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
10000
15000
20000
25000
725
1087
1449
1812
236
312
395
482
0.6
1.4
2.6
4.7
279
346
422
503
1.0
2.0
3.4
5.5
319
376
448
524
1.5
2.6
4.2
6.5
355
405
472
546
1.9
3.2
5.0
7.5
423
459
516
585
3.0
4.4
6.7
9.5
509
558
621
5.7
8.3
11.6
555
599
656
7.2
9.9
13.6
601
638
690
8.8
11.6
15.7
645
674
723
10.5
13.4
17.7
686
710
755
12.3
15.3
19.7
30000
35000
40000
45000
2174
2536
2899
3261
571
661
752
843
7.6
11.7
17.1
24.0
589
676
765
854
8.6
12.9
18.4
25.4
606
691
778
866
9.7
14.1
19.7
26.9
624
706
790
877
10.8
15.3
21.1
28.4
659
736
817
900
13.2
17.9
23.9
31.5
692
766
843
923
15.6
20.7
27.0
34.8
723
795
870
947
18.1
23.5
30.1
38.2
753
823
896
971
20.6
26.4
33.4
41.7
781
849
921
994
23.1
29.3
36.7
45.4
810
874
944
1017
25.5
32.2
40.0
49.0
50000
55000
60000
65000
3623
3986
4348
4710
934
1025
1117
1209
32.5
42.9
55.4
70.1
944
1035
1126
1217
34.1
44.7
57.3
72.1
955
1044
1134
1225
35.8
46.5
59.2
74.2
965
1054
1143
1232
37.4
48.2
61.2
76.3
986
1072
1160
1248
40.8
51.9
65.1
80.5
1006
1091
1177
1264
44.3
55.7
69.1
84.8
1027
1110
1194
1280
47.9
59.6
73.3
89.3
1049
1129
1212
1296
51.7
63.6
77.5
93.8
1070
1149
1229
1312
55.6
67.7
81.9
98.4
1091
1168
1247
1328
59.6
72.0
86.4
103.1
70000
75000
80000
5072
5435
5797
1300
1392
1484
87.2
106.9
129.4
1308
1399
1491
89.4
109.2
131.8
1315
1406
1497
91.6
111.6
134.4
1323
1413
1504
93.8
114.0
137.0
1337
1427
1517
98.4
118.8
142.1
1352
1440
1529
103.0
123.7
147.3
1367
1454
107.7
128.7
1381
1468
112.5
133.8
1396
1482
117.3
138.9
1411
1496
122.3
144.1
CFM
OV
FPM
5" SP
RPM
BHP
20000
25000
30000
35000
1449
1812
2174
2536
779
815
865
923
19.4
24.0
30.4
38.0
846
873
918
971
40000
45000
50000
55000
2899
3261
3623
3986
989
1060
1132
1206
46.6
56.5
67.8
80.8
60000
65000
70000
75000
4348
4710
5072
5435
1283
1361
1441
1523
95.7
112.9
132.5
154.8
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
23.9
28.6
35.3
43.7
908
929
969
1018
28.6
33.6
40.5
49.3
984
1017
1064
38.9
45.9
55.1
1089
1111
1150
50.3
57.5
67.2
1203
1232
70.4
80.2
1290
1311
84.1
94.2
1372
1390
98.2
109.2
1466
125.0
1032
1100
1171
1244
53.2
63.9
76.0
89.8
1075
1139
1207
1279
59.8
71.4
84.3
98.8
1117
1177
1243
1313
66.2
78.8
92.6
107.9
1198
1252
1312
1377
79.3
93.4
109.1
126.2
1275
1325
1379
1440
92.8
108.0
125.3
144.3
1348
1395
1446
1501
107.1
123.0
141.5
162.2
1419
1461
1510
122.2
138.6
158.0
1489
1526
138.2
154.8
1318
1394
1472
105.4
123.1
143.2
1352
1426
1502
115.2
133.5
154.2
1385
1458
1533
125.0
144.1
165.4
1446
1518
144.9
165.5
1505
164.8
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
20
CLASS I
490 RA
1/4" SP
RPM
BHP
48 In. Wheel Diameter
13.80 Sq. Ft. Outlet Area
Peak BHP = 45.287 (RPM ÷1000) 3
Tip Speed (fpm) = 12.57 x RPM
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
CLASS I
20" SP
RPM
BHP
939 RPM
CLASS II 1224 RPM
CLASS III 1535 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
10000
15000
20000
25000
725
1087
1449
1812
241
313
392
474
0.6
1.3
2.3
4.0
291
352
424
501
1.1
1.9
3.2
5.1
337
387
453
527
1.7
2.6
4.1
6.2
379
421
481
551
2.3
3.4
5.0
7.3
483
533
596
5.0
6.9
9.5
541
582
639
6.9
8.9
11.8
595
629
679
9.0
11.1
14.2
673
718
13.5
16.7
716
756
16.0
19.4
758
793
18.7
22.2
30000
35000
40000
45000
2174
2536
2899
3261
558
644
730
817
6.3
9.5
13.7
19.0
582
664
748
833
7.6
11.0
15.4
20.9
604
684
766
849
8.9
12.5
17.1
22.8
625
703
783
865
10.2
14.0
18.8
24.7
666
739
816
895
12.9
17.1
22.3
28.6
704
774
847
924
15.6
20.2
25.8
32.5
740
807
878
952
18.3
23.4
29.4
36.5
775
838
907
979
21.1
26.5
33.0
40.5
809
869
935
1005
24.0
29.7
36.5
44.6
841
899
963
1030
27.0
32.9
40.2
48.6
50000
55000
60000
65000
3623
3986
4348
4710
904
991
1079
1167
25.6
33.6
43.2
54.4
919
1005
1092
1179
27.7
35.9
45.6
57.1
934
1019
1104
1190
29.8
38.2
48.1
59.8
948
1032
1116
1202
31.9
40.5
50.6
62.5
976
1058
1140
1224
36.2
45.2
55.7
68.0
1002
1082
1164
1246
40.5
49.9
60.8
73.5
1028
1106
1186
1267
44.9
54.7
66.0
79.1
1053
1130
1208
1288
49.3
59.5
71.2
84.7
1078
1153
1230
1308
53.8
64.4
76.5
90.3
1101
1175
1251
1328
58.2
69.3
81.8
96.1
70000
75000
80000
85000
5072
5435
5797
6159
1255
1343
1431
1519
67.5
82.6
99.8
119.2
1266
1353
1441
1529
70.4
85.7
103.1
122.7
1277
1363
1450
73.3
88.8
106.4
1287
1373
1460
76.2
91.9
109.7
1308
1393
1478
82.1
98.1
116.3
1329
1412
1497
88.0
104.4
123.0
1349
1431
1515
93.9
110.8
129.8
1368
1450
1532
100.0
117.2
136.6
1388
1468
106.0
123.7
1406 112.1
1486 130.2
CFM
OV
FPM
5" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
20000
25000
30000
35000
1449
1812
2174
2536
836
863
905
957
40000
45000
50000
55000
2899
3261
3623
3986
60000
65000
70000
75000
4348
4710
5072
5435
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
24.7
28.2
33.3
39.7
931
966
1012
34.9
40.0
46.8
995
1025
1066
42.0
47.3
54.3
1057
1082
1118
49.6
55.0
62.2
1190
1219
71.9
79.3
1315
98.0
1406
118.2
1493
139.6
1016
1080
1148
1218
47.5
56.7
67.2
79.1
1067
1128
1192
1260
55.1
64.9
76.2
88.9
1116
1174
1236
1301
63.0
73.3
85.3
98.8
1164
1218
1278
1341
71.2
82.0
94.5
108.8
1257
1305
1359
1417
88.7
100.3
113.7
129.1
1347
1388
1436
1491
107.7
119.7
133.9
150.3
1433
1468
1512
128.1
140.4
155.2
1516
150.0
1292
1366
1443
1521
92.5
107.6
124.4
143.3
1331
1404
1479
103.2
119.2
136.8
1370
1441
1513
113.9
130.8
149.3
1407
1476
124.7
142.4
1480
146.5
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
14" SP
RPM
BHP
16" SP
RPM
BHP
Power ratings (BHP) do not include drive losses.
CHICAGO BLOWER CORPORATION
DESIGN 51
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
52-7/8 In. Wheel Diameter
16.92 Sq. Ft. Outlet Area
Peak BHP = 78.462 (RPM ÷1000) 3
Tip Speed (fpm) = 13.84 x RPM
542
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
858 RPM
CLASS II 1120 RPM
CLASS III 1404 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
15000
21000
27000
33000
887
1241
1596
1950
246
317
394
473
1.1
2.3
4.2
7.1
280
345
415
490
1.7
3.1
5.1
8.2
311
371
437
508
2.3
3.9
6.2
9.4
341
394
458
525
2.9
4.8
7.3
10.7
395
439
496
560
4.3
6.5
9.5
13.3
446
481
531
592
5.8
8.2
11.7
16.0
494
520
565
621
7.6
10.1
13.9
18.8
558
599
650
12.0
16.1
21.5
594
631
678
14.1
18.4
24.2
630
661
706
16.4
20.7
26.8
39000
45000
51000
57000
2305
2660
3014
3369
553
634
715
797
11.2
16.7
23.9
32.9
568
647
727
807
12.5
18.2
25.5
34.7
582
659
738
817
13.8
19.7
27.2
36.5
597
672
749
827
15.2
21.2
28.9
38.4
627
698
771
847
18.2
24.5
32.5
42.3
657
724
794
867
21.4
28.0
36.2
46.4
684
750
817
888
24.6
31.6
40.2
50.6
710
774
840
908
27.8
35.3
44.3
55.0
734
797
862
929
31.1
39.1
48.5
59.6
759
819
883
949
34.3
42.8
52.7
64.2
63000
69000
75000
81000
3723
4078
4433
4787
879
961
1043
1125
43.9
57.2
73.1
91.7
888
969
1051
1133
45.9
59.4
75.5
94.2
897
978
1058
1140
47.9
61.6
77.9
96.8
906
986
1066
1147
50.0
63.9
80.3
99.4
924
1002
1081
1161
54.2
68.4
85.2
104.6
942
1019
1096
1175
58.6
73.1
90.2
110.0
961
1035
1111
1189
63.1
78.0
95.3
115.5
979
1052
1127
1203
67.8
82.9
100.6
121.0
998
1069
1142
1217
72.7
88.1
106.0
126.7
1016
1086
1158
1231
77.7
93.4
111.6
132.6
87000
93000
99000
5142
5496
5851
1208
1290
1373
113.1
137.8
165.8
1214
1296
1378
115.9
140.7
168.9
1221
1303
1384
118.7
143.7
172.1
1228
1309
1390
121.4
146.6
175.2
1241
1321
1402
127.0
152.6
181.5
1254
1333
132.7
158.6
1267
1345
138.5
164.8
1280
1358
144.4
171.0
1293
1370
150.5
177.4
1306
1382
156.6
183.8
CFM
OV
FPM
5" SP
RPM
BHP
23000
29000
35000
41000
1359
1714
2069
2423
703
731
774
824
22.6
27.7
34.9
43.7
765
785
823
869
27.9
33.3
40.7
50.3
837
870
913
39.3
46.9
57.0
889
915
955
47000
53000
59000
65000
2778
3132
3487
3842
882
944
1009
1075
53.7
65.1
78.1
93.1
922
981
1044
1109
61.4
73.9
87.9
103.7
962
1017
1078
1142
69.1
82.6
97.6
114.5
71000
77000
83000
89000
4196
4551
4905
5260
1143
1213
1284
1357
110.2
130.0
152.5
178.1
1175
1243
1312
1384
121.7
142.1
165.2
191.4
1207
1273
1341
133.3
154.5
178.3
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
45.7
53.4
63.9
985
1002
1034
59.2
67.5
78.4
1088
1110
83.0
94.0
1168
1184
99.4
111.0
1257
129.1
1327
148.0
1393
1001
1053
1111
1173
76.7
91.3
107.4
125.2
1076
1123
1175
1232
92.2
108.5
126.8
146.7
1147
1190
1237
1290
108.4
125.8
145.9
168.1
1214
1254
1299
1347
125.6
143.7
165.1
189.2
1280
1315
1358
1403
143.8
162.4
184.7
210.3
1345
1375
163.2
182.0
1237
1302
1369
145.0
167.1
191.7
1294
1357
168.5
192.5
1348
192.0
1401
215.3
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
SIZE
CLASS I
542 RA
1/4" SP
RPM
BHP
52-7/8 In. Wheel Diameter
16.92 Sq. Ft. Outlet Area
Peak BHP = 73.455 (RPM ÷1000) 3
Tip Speed (fpm) = 13.84 x RPM
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
CLASS I
167.4
858 RPM
CLASS II 1120 RPM
CLASS III 1404 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
15000
21000
27000
33000
887
1241
1596
1950
248
316
389
463
1.1
2.1
3.6
5.9
288
348
416
486
1.8
3.0
4.8
7.4
325
378
441
508
2.5
3.9
6.0
8.8
359
406
464
529
3.3
4.9
7.2
10.3
422
457
509
568
5.2
7.0
9.7
13.2
479
506
550
605
7.5
9.3
12.2
16.2
552
590
640
11.9
15.0
19.3
596
628
673
14.8
17.9
22.4
637
664
706
17.8
21.1
25.8
700
737
24.4
29.3
39000
45000
51000
57000
2305
2660
3014
3369
539
616
694
772
9.2
13.5
19.0
25.9
560
634
710
786
10.8
15.3
21.1
28.3
579
651
725
800
12.5
17.3
23.3
30.7
597
668
740
814
14.2
19.2
25.4
33.1
632
699
769
841
17.7
23.1
29.9
38.0
665
729
797
866
21.1
27.2
34.4
42.9
697
758
823
890
24.6
31.2
38.9
48.0
727
786
849
914
28.2
35.2
43.5
53.1
756
813
874
937
31.8
39.3
48.0
58.1
785
839
898
960
35.6
43.4
52.6
63.2
63000
69000
75000
81000
3723
4078
4433
4787
850
928
1007
1086
34.4
44.6
56.8
71.0
863
941
1018
1096
37.0
47.5
59.9
74.3
876
953
1029
1107
39.6
50.4
63.0
77.6
889
964
1040
1117
42.3
53.2
66.1
81.0
913
987
1062
1137
47.7
59.1
72.4
87.8
937
1009
1082
1156
53.1
65.0
78.8
94.7
960
1030
1102
1175
58.6
71.0
85.3
101.6
982
1051
1122
1193
64.2
77.0
91.8
108.6
1003
1071
1141
1211
69.8
83.1
98.3
115.6
1025
1091
1160
1229
75.4
89.2
104.9
122.7
87000
93000
99000
105000
5142
5496
5851
6206
1165
1244
1323
1402
87.4
106.2
127.6
151.6
1175
1253
1332
90.9
110.0
131.6
1184
1262
1340
94.5
113.8
135.7
1194
1271
1349
98.1
117.7
139.8
1212
1289
1365
105.4
125.4
148.0
1231
1306
1382
112.8
133.2
156.3
1249
1323
1398
120.1
141.1
164.6
1266
1339
127.6
149.0
1283
1356
135.1
157.0
1300
1372
142.7
165.1
CFM
OV
FPM
5" SP
RPM
BHP
29000
35000
41000
47000
1714
2069
2423
2778
777
811
856
908
33.1
38.8
46.1
55.0
840
868
907
955
53000
59000
65000
71000
3132
3487
3842
4196
964
1024
1087
1152
65.5
77.7
91.4
106.9
77000
83000
89000
4551
4905
5260
1218
1287
1356
124.3
143.7
165.4
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
41.2
46.9
54.6
64.1
899
923
957
1001
49.8
55.7
63.6
73.5
976
1006
1045
65.1
73.1
83.4
1076
1099
1131
85.4
93.7
104.4
1187
1214
116.4
127.3
1271
1293
140.8
152.0
1370
178.5
1008
1065
1126
1188
75.3
88.3
103.1
119.6
1051
1105
1163
1224
85.4
99.1
114.8
132.3
1092
1144
1200
1259
95.7
110.1
126.6
145.0
1172
1219
1270
1326
117.6
133.1
150.9
170.9
1249
1291
1338
1390
141.0
157.3
176.2
197.6
1323
1360
1404
166.0
182.9
202.6
1395
192.6
1253
1320
1387
138.0
158.5
181.2
1287
1352
151.8
173.3
1320
1383
165.5
188.1
1384
193.2
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
18" SP
RPM
BHP
20" SP
RPM
BHP
Power ratings (BHP) do not include drive losses.
21
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
58-1/2 In. Wheel Diameter
20.70 Sq. Ft. Outlet Area
Peak BHP = 130.07 (RPM ÷1000) 3
Tip Speed (fpm) = 15.32 x RPM
600
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
775 RPM
CLASS II 1011 RPM
CLASS III 1268 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
14000
21000
28000
35000
676
1014
1353
1691
187
244
308
375
0.8
1.8
3.4
5.9
224
274
331
393
1.4
2.6
4.4
7.1
257
299
353
411
2.0
3.5
5.6
8.5
288
324
374
430
2.7
4.3
6.7
9.9
345
370
411
463
4.3
6.1
9.0
12.8
412
448
494
8.0
11.3
15.7
452
482
523
10.2
13.6
18.5
491
514
553
12.5
16.1
21.4
527
545
581
15.0
18.7
24.2
576
608
21.5
27.2
42000
49000
56000
63000
2029
2367
2705
3043
443
512
582
652
9.6
14.7
21.4
30.0
458
525
593
662
11.0
16.3
23.2
32.0
473
538
605
672
12.5
18.0
25.1
34.1
489
551
616
682
14.1
19.8
27.0
36.2
519
578
639
702
17.5
23.5
31.1
40.6
547
604
662
723
21.0
27.4
35.4
45.2
573
628
685
744
24.4
31.5
39.9
50.1
599
651
707
764
27.9
35.5
44.5
55.2
623
673
728
784
31.3
39.6
49.2
60.3
648
695
747
803
34.7
43.6
53.8
65.5
70000
77000
84000
91000
3382
3720
4058
4396
723
793
864
935
40.6
53.5
69.0
87.2
732
802
872
942
42.8
56.0
71.6
90.1
741
810
879
949
45.1
58.4
74.3
93.0
750
818
886
956
47.4
61.0
77.1
95.9
768
834
901
969
52.2
66.1
82.6
101.9
786
851
916
983
57.2
71.5
88.3
108.0
804
867
931
997
62.4
77.0
94.2
114.2
823
884
947
1011
67.8
82.8
100.3
120.6
841
901
962
1025
73.4
88.7
106.6
127.2
860
918
978
1039
79.1
94.8
113.0
134.0
98000
105000
112000
119000
4734
5072
5411
5749
1006
1077
1148
1219
108.4
132.9
160.8
192.4
1012
1083
1153
1224
111.5
136.2
164.3
196.1
1019
1089
1159
1229
114.6
139.5
167.8
199.9
1025
1095
1165
1235
117.8
142.9
171.4
203.6
1038
1107
1176
1245
124.1
149.6
178.6
211.3
1051
1119
1187
1256
130.6
156.5
185.9
219.0
1063
1131
1198
1266
137.3
163.6
193.3
226.8
1076
1143
1209
144.0
170.7
200.8
1089
1155
1221
151.0
178.0
208.5
1102
1167
1232
158.0
185.4
216.3
CFM
OV
FPM
5" SP
RPM
BHP
32000
39000
46000
53000
1546
1884
2222
2560
646
679
718
764
30.6
37.8
47.1
58.0
699
724
761
803
37.4
44.7
54.7
66.6
749
769
802
841
44.6
52.1
62.4
75.2
797
812
841
878
52.1
60.0
70.5
83.9
897
916
948
60000
67000
74000
81000
2899
3237
3575
3913
816
870
926
984
70.2
84.1
99.8
117.8
851
903
958
1014
80.1
95.2
112.1
131.1
885
935
988
1043
90.0
106.3
124.3
144.4
920
966
1017
1071
99.7
117.3
136.6
157.8
88000
95000
102000
109000
4251
4589
4928
5266
1042
1102
1164
1227
138.3
161.7
188.3
218.3
1071
1130
1190
1251
152.5
176.7
203.9
234.6
1100
1157
1215
166.9
192.0
220.0
1127
1183
1240
181.4
207.5
236.4
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
22
CLASS I
600 RA
1/4" SP
RPM
BHP
58-1/2 In. Wheel Diameter
20.70 Sq. Ft. Outlet Area
Peak BHP = 121.77 (RPM ÷1000) 3
Tip Speed (fpm) = 15.32 x RPM
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
77.2
87.9
102.0
976
990
1015
95.4
107.0
121.4
1061
1079
127.6
142.1
1129
1143
149.0
164.5
1205
188.1
1265
986
1028
1074
1124
119.2
139.1
160.9
184.7
1049
1087
1130
1176
139.4
160.8
185.0
211.3
1109
1145
1184
1227
160.7
183.1
209.0
237.7
1167
1199
1237
183.2
206.3
233.3
1223
1252
206.9
230.4
1178
1233
210.5
238.8
1226
239.7
CLASS I
212.5
775 RPM
CLASS II 1011 RPM
CLASS III 1268 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
14000
21000
28000
35000
676
1014
1353
1691
191
246
306
369
0.9
1.7
3.0
5.1
234
279
333
392
1.6
2.6
4.3
6.6
273
309
359
414
2.4
3.6
5.5
8.2
309
338
383
435
3.4
4.7
6.8
9.7
390
427
474
7.1
9.5
12.9
440
468
510
9.8
12.4
16.2
485
508
544
12.9
15.6
19.6
546
577
19.1
23.3
582
609
22.9
27.2
617
641
26.9
31.3
42000
49000
56000
63000
2029
2367
2705
3043
434
499
566
633
8.0
12.0
17.2
23.8
454
517
582
647
9.8
14.1
19.6
26.5
473
534
597
661
11.7
16.2
22.0
29.1
491
551
612
674
13.5
18.3
24.4
31.8
526
582
640
700
17.3
22.7
29.3
37.3
558
611
667
725
21.0
27.1
34.3
42.8
589
639
692
749
24.9
31.4
39.3
48.4
619
666
717
772
28.9
35.9
44.3
54.1
647
692
742
794
33.0
40.4
49.3
59.7
675
718
765
816
37.4
45.1
54.4
65.3
70000
77000
84000
91000
3382
3720
4058
4396
700
767
835
903
32.0
41.9
53.8
67.8
713
779
846
913
34.9
45.1
57.3
71.5
726
791
857
923
37.9
48.3
60.8
75.3
738
802
867
933
40.8
51.6
64.3
79.1
762
824
888
952
46.8
58.2
71.4
86.7
785
846
908
971
52.9
64.8
78.6
94.5
807
866
927
989
59.1
71.5
85.9
102.3
828
886
946
1007
65.3
78.3
93.2
110.2
849
906
964
1024
71.6
85.2
100.7
118.2
869
925
982
1041
77.8
92.1
108.1
126.3
98000
105000
112000
119000
4734
5072
5411
5749
970
1038
1107
1175
84.0
102.7
124.0
148.1
980
1047
1115
1183
88.0
107.0
128.6
152.9
989
1056
1123
1190
92.1
111.3
133.2
157.8
999
1065
1131
1198
96.1
115.7
137.8
162.8
1017
1082
1148
1213
104.4
124.4
147.1
172.7
1034
1099
1163
1228
112.7
133.3
156.6
182.6
1052
1115
1179
1243
121.1
142.2
166.1
192.7
1069
1131
1194
1258
129.5
151.3
175.6
202.8
1085
1147
1209
138.1
160.3
185.2
1101
1162
1224
146.6
169.5
194.9
CFM
OV
FPM
5" SP
RPM
BHP
32000
39000
46000
53000
1546
1884
2222
2560
692
716
750
791
38.1
43.6
51.0
60.3
750
770
799
836
47.7
53.4
61.2
71.0
822
846
879
64.1
72.0
82.2
871
892
922
60000
67000
74000
81000
2899
3237
3575
3913
837
887
939
994
71.4
84.3
99.0
115.5
879
926
976
1028
82.8
96.6
112.3
129.9
919
964
1012
1062
94.6
109.1
125.8
144.5
88000
95000
102000
109000
4251
4589
4928
5266
1050
1107
1166
1226
133.9
154.5
177.3
202.8
1083
1139
1196
1255
149.6
171.4
195.5
222.0
1115
1169
1225
165.3
188.4
213.7
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
75.5
83.5
94.0
980
1003
108.7
119.4
1063
1082
136.0
147.2
1156
177.3
1227
209.2
958
1000
1046
1095
106.9
122.0
139.5
159.2
1034
1071
1113
1158
132.9
149.1
167.9
189.2
1107
1139
1176
1218
161.1
178.0
197.9
220.5
1177
1205
1238
191.4
208.8
229.4
1245
223.9
1146
1199
1253
181.1
205.3
231.9
1206
1256
213.1
239.5
1264
246.0
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
18" SP
RPM
BHP
20" SP
RPM
BHP
Power ratings (BHP) do not include drive losses.
CHICAGO BLOWER CORPORATION
DESIGN 51
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
64-3/4 In. Wheel Diameter
25.05 Sq. Ft. Outlet Area
Peak BHP = 216.08 (RPM ÷1000) 3
Tip Speed (fpm) = 16.95 x RPM
660
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
CLASS I
695 RPM
CLASS II
906 RPM
CLASS III 1136 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
2.2
3.9
6.4
10.0
256
285
330
383
3.0
4.8
7.8
11.7
328
365
414
6.9
10.5
15.2
367
399
442
9.2
13.1
18.6
406
431
469
11.9
15.9
22.1
441
460
496
14.7
18.9
25.5
489
521
22.1
28.9
517
546
25.5
32.5
425
486
550
614
15.1
22.1
31.3
43.1
439
498
560
623
17.0
24.3
33.7
45.7
467
522
580
641
21.1
28.8
38.7
51.1
492
546
601
659
25.3
33.7
44.0
56.9
516
568
622
678
29.6
38.6
49.6
62.9
539
589
641
696
33.8
43.6
55.2
69.2
561
608
660
714
37.9
48.5
60.9
75.5
583
628
678
731
42.1
53.5
66.6
81.9
54.8
72.3
93.3
118.1
679
744
810
876
57.6
75.4
96.7
121.8
687
752
817
882
60.5
78.5
100.1
125.4
703
766
830
895
66.5
85.0
107.0
132.9
719
781
843
907
72.6
91.6
114.1
140.5
735
795
857
919
79.1
98.5
121.5
148.3
752
810
870
931
85.8
105.6
129.0
156.3
769
825
884
944
92.7
113.0
136.8
164.5
785
840
897
956
99.7
120.5
144.8
172.9
147.1
180.5
218.7
943
1009
1076
151.0
184.7
223.3
948
1015
1081
154.9
188.9
227.7
960
1025
1091
162.9
197.5
236.8
971
1036
1101
171.1
206.1
246.0
982
1046
1111
179.4
214.9
255.3
994
1057
1120
187.8
223.9
264.7
1005
1067
1130
196.5
233.0
274.3
1017
1078
205.3
242.2
CFM
OV
FPM
15000
24000
33000
42000
599
958
1317
1677
157
210
269
333
0.8
1.9
3.8
6.9
194
237
291
349
1.5
2.9
5.0
8.4
226
262
312
367
51000
60000
69000
78000
2036
2395
2754
3114
398
463
529
596
11.6
18.1
26.8
38.0
411
475
540
605
13.3
20.0
29.0
40.5
87000
96000
105000
114000
3473
3832
4192
4551
663
730
797
864
52.1
69.3
90.0
114.5
671
737
804
870
123000
132000
141000
150000
4910
5269
5629
5988
931
999
1066
1134
143.2
176.4
214.3
257.4
937
1004
1071
CFM
OV
FPM
5" SP
RPM
BHP
35000
44000
53000
62000
1397
1756
2116
2475
575
599
635
676
34.3
42.1
53.1
66.4
625
643
674
712
42.3
50.5
61.9
76.5
685
712
748
59.5
71.2
86.6
727
749
782
69.1
81.0
96.9
805
820
846
89.5
102.2
118.7
889
908
125.5
142.2
954
968
150.1
167.7
71000
80000
89000
98000
2834
3194
3553
3912
723
775
828
882
81.6
98.9
118.7
141.4
756
805
856
910
93.3
112.1
133.4
157.4
788
834
884
936
104.9
125.4
148.1
173.6
820
863
910
961
116.4
138.5
162.9
189.8
881
919
962
1010
139.7
164.4
192.1
222.3
939
974
1013
1057
164.1
190.5
221.0
254.5
993
1026
1063
1103
189.9
217.4
249.9
286.3
107000
116000
125000
134000
4271
4631
4990
5349
937
994
1053
1113
167.4
197.4
231.6
270.4
964
1019
1076
1134
184.7
215.6
250.7
290.4
989
1044
1099
202.2
234.3
270.5
1014
1067
1122
219.9
253.3
290.6
1060
1112
255.3
291.6
1104
290.7
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
660 RA
1/4" SP
RPM
BHP
64-3/4 In. Wheel Diameter
25.05 Sq. Ft. Outlet Area
Peak BHP = 202.29 (RPM ÷1000) 3
Tip Speed (fpm) = 16.95 x RPM
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
CLASS I
695 RPM
CLASS II
906 RPM
14" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
1028
194.9
1085
223.4
1047
1076
1111
217.3
245.6
279.4
1100
1125
246.4
275.0
4" SP
RPM
BHP
20" SP
RPM
BHP
CLASS III 1136 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
15000
24000
33000
42000
599
958
1317
1677
162
212
268
328
0.9
1.8
3.4
6.0
204
243
294
349
1.7
2.9
4.9
7.8
242
272
317
369
2.7
4.1
6.4
9.7
298
339
388
5.3
7.9
11.5
348
380
424
8.2
11.1
15.3
394
418
457
11.6
14.6
19.3
455
488
18.5
23.5
490
518
22.8
27.9
523
548
27.4
32.7
555
576
32.3
37.7
51000
60000
69000
78000
2036
2395
2754
3114
389
452
515
578
9.7
14.8
21.6
30.3
408
468
529
591
11.9
17.3
24.5
33.5
425
483
543
603
14.1
19.9
27.4
36.8
441
498
556
615
16.3
22.5
30.4
40.1
473
526
581
639
20.9
27.8
36.4
46.9
502
552
605
661
25.5
33.2
42.6
53.8
530
578
628
682
30.2
38.6
48.7
60.7
557
602
651
703
35.0
44.0
54.9
67.7
583
626
673
723
40.1
49.6
61.1
74.6
608
649
694
742
45.4
55.3
67.4
81.6
87000
96000
105000
114000
3473
3832
4192
4551
642
706
770
835
41.1
54.4
70.3
89.1
654
717
780
844
44.7
58.3
74.6
93.8
665
727
790
853
48.4
62.4
79.0
98.6
676
737
799
861
52.1
66.4
83.4
103.3
697
757
817
878
59.5
74.6
92.3
112.9
718
776
835
895
67.1
82.9
101.3
122.6
737
794
852
911
74.8
91.2
110.4
132.4
756
812
869
927
82.5
99.7
119.6
142.3
775
829
885
942
90.3
108.2
128.8
152.3
793
847
901
957
98.1
116.8
138.1
162.3
123000
132000
141000
150000
4910
5269
5629
5988
899
964
1028
1093
111.1
136.5
165.6
198.5
907
972
1036
1100
116.2
141.9
171.4
204.7
916
979
1043
1107
121.3
147.4
177.2
210.9
924
987
1050
1114
126.4
152.9
183.0
217.1
940
1002
1064
1127
136.7
163.9
194.8
229.5
956
1017
1078
147.1
175.0
206.6
971
1031
1092
157.6
186.3
218.6
986
1045
1105
168.2
197.6
230.6
1000
1059
1119
178.9
209.0
242.7
1015
1073
1131
189.7
220.4
254.8
CFM
OV
FPM
5" SP
RPM
BHP
44000
53000
62000
71000
1756
2116
2475
2834
636
665
702
744
50.2
58.8
69.9
83.5
687
711
743
783
62.2
71.0
82.7
97.1
735
755
784
820
75.2
84.2
96.2
111.4
798
823
856
80000
89000
98000
107000
3194
3553
3912
4271
791
840
891
944
99.5
117.9
138.8
162.3
826
873
923
974
114.2
134.0
156.3
181.4
861
906
953
1003
129.4
150.2
174.0
200.6
116000
125000
134000
4631
4990
5349
999
1055
1112
188.7
218.2
251.2
1027
1082
209.4
240.4
1055
1108
230.1
262.8
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
98.3
110.5
126.2
880
899
926
128.8
141.5
157.8
971
993
175.6
192.2
1039
1058
212.2
229.3
895
937
983
1031
145.0
166.8
191.8
219.8
959
998
1041
1086
177.8
201.4
228.4
258.7
1022
1057
1096
213.0
237.8
266.4
1083
1113
250.5
276.2
1082
1133
250.8
285.1
1134
292.6
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
16" SP
RPM
BHP
1120
18" SP
RPM
BHP
20" SP
RPM
BHP
269.0
Power ratings (BHP) do not include drive losses.
23
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
71-3/16 In. Wheel Diameter
30.640 Sq. Ft. Outlet Area
Peak BHP = 347.09 (RPM ÷1000) 3
Tip Speed (fpm) = 18.64 x RPM
730
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
637 RPM
CLASS II
831 RPM
CLASS III 1042 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
18000
29000
40000
51000
587
946
1305
1664
142
191
245
304
1.0
2.3
4.6
8.4
176
216
265
319
1.7
3.5
6.1
10.2
205
238
284
334
2.6
4.7
7.7
12.2
233
259
301
349
3.6
5.8
9.4
14.2
298
333
377
8.3
12.7
18.4
334
363
402
11.1
15.9
22.6
369
392
427
14.3
19.3
26.8
401
419
451
17.7
22.9
30.9
445
475
26.8
35.1
471
497
30.9
39.5
62000
73000
84000
95000
2023
2383
2742
3101
363
424
484
546
14.1
22.2
32.9
46.8
376
434
494
554
16.2
24.6
35.6
49.8
388
445
503
562
18.4
27.1
38.4
52.9
401
455
512
570
20.8
29.7
41.3
56.1
426
477
530
586
25.8
35.2
47.4
62.7
449
498
549
602
30.9
41.1
53.8
69.7
470
518
568
619
36.0
47.1
60.6
77.0
491
537
586
636
41.1
53.1
67.5
84.6
511
555
603
652
46.2
59.2
74.4
92.3
532
573
619
667
51.2
65.2
81.3
100.1
106000
117000
128000
139000
3460
3819
4178
4537
607
669
730
792
64.1
85.4
111.1
141.5
614
675
736
798
67.5
89.2
115.1
145.9
621
682
742
803
71.0
92.9
119.2
150.3
629
688
748
809
74.4
96.7
123.4
154.8
643
701
760
820
81.6
104.5
131.8
163.8
658
714
772
831
89.1
112.6
140.5
173.1
673
728
784
842
97.0
121.0
149.4
182.6
688
741
796
853
105.1
129.6
158.5
192.3
702
755
808
864
113.5
138.5
167.9
202.2
717
768
821
875
122.1
147.7
177.7
212.4
150000
161000
172000
183000
4896
5255
5614
5973
854
916
978
1040
177.0
218.1
265.2
318.6
859
921
982
181.8
223.1
270.5
864
925
987
186.5
228.3
276.0
869
930
991
191.3
233.4
281.5
879
940
1000
201.0
243.8
292.5
890
949
1009
210.9
254.3
303.7
900
959
1018
221.0
265.0
315.0
910
968
1027
231.3
275.9
326.5
920
978
1036
241.8
287.0
338.2
931
987
252.5
298.2
CFM
OV
FPM
5" SP
RPM
BHP
48000
59000
70000
81000
1567
1926
2285
2644
532
561
597
638
45.9
57.5
72.6
90.1
575
599
631
669
55.9
67.8
84.0
103.3
616
635
665
700
66.6
78.8
95.6
116.4
656
670
697
730
77.8
90.5
107.7
129.6
739
757
787
116.0
133.6
156.8
803
816
840
143.4
161.9
185.7
874
892
192.5
216.6
929
943
224.7
249.6
981
993
257.8
284.8
92000
103000
114000
125000
3003
3362
3721
4080
684
732
781
832
109.9
132.7
158.8
188.8
712
759
807
856
125.2
149.7
177.5
209.1
740
784
831
880
140.3
166.8
196.4
229.7
767
809
855
902
155.3
183.8
215.3
250.3
820
858
900
945
185.1
217.5
253.0
291.7
871
906
944
986
215.6
250.8
290.2
333.0
920
952
988
1027
247.5
284.6
327.1
373.9
966
997
1030
281.0
319.4
364.3
1012
1039
316.3
355.6
136000
147000
158000
4439
4798
5157
884
937
991
223.3
262.9
308.0
907
958
1011
244.9
285.7
331.9
929
980
1031
267.0
309.1
356.4
951
1001
289.4
332.9
992
1041
334.3
381.2
1031
379.3
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
24
CLASS I
730 RA
1/4" SP
RPM
BHP
71-3/16 In. Wheel Diameter
30.640 Sq. Ft. Outlet Area
Peak BHP = 324.94 (RPM ÷1000) 3
Tip Speed (fpm) = 18.64 x RPM
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
10" SP
RPM
BHP
12" SP
RPM
BHP
CLASS I
637 RPM
CLASS II
831 RPM
14" SP
RPM
BHP
16" SP
RPM
BHP
18" SP
RPM
BHP
20" SP
RPM
BHP
1042
321.5
CLASS III 1042 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
18000
29000
40000
51000
587
946
1305
1664
147
192
244
299
1.0
2.2
4.2
7.3
185
221
267
318
2.0
3.5
5.9
9.5
220
247
289
337
3.2
4.9
7.7
11.7
271
309
354
6.4
9.6
14.0
317
346
386
9.9
13.4
18.6
358
381
416
14.0
17.7
23.4
414
444
22.4
28.5
446
472
27.6
33.9
476
499
33.2
39.6
505
525
39.1
45.7
62000
73000
84000
95000
2023
2383
2742
3101
355
413
471
529
11.8
18.1
26.4
37.1
372
427
484
541
14.4
21.2
29.9
41.1
388
441
496
552
17.2
24.3
33.5
45.1
403
455
508
563
19.9
27.5
37.1
49.1
431
480
531
584
25.4
34.0
44.5
57.4
458
504
553
604
31.0
40.5
52.0
65.7
483
527
574
623
36.7
47.0
59.5
74.2
508
549
594
642
42.6
53.6
67.0
82.6
531
571
614
660
48.7
60.4
74.5
91.1
554
591
633
678
55.1
67.3
82.1
99.6
106000
117000
128000
139000
3460
3819
4178
4537
588
646
705
765
50.5
66.9
86.5
109.8
598
656
714
773
54.9
71.7
91.8
115.5
608
665
723
781
59.3
76.6
97.1
121.3
618
675
731
789
63.8
81.5
102.5
127.1
638
692
748
804
72.9
91.5
113.3
138.7
656
710
764
819
82.1
101.5
124.3
150.6
674
726
780
834
91.5
111.8
135.3
162.5
691
742
795
848
100.9
122.1
146.5
174.6
708
758
810
862
110.4
132.5
157.8
186.7
725
774
824
876
119.8
142.9
169.1
198.9
150000
161000
172000
183000
4896
5255
5614
5973
824
883
943
1002
137.0
168.3
204.3
245.0
831
890
949
1008
143.1
174.9
211.3
252.5
839
897
956
1014
149.3
181.6
218.4
260.0
846
904
962
1021
155.5
188.3
225.5
267.6
861
918
975
1033
168.1
201.7
239.8
282.8
875
931
988
180.8
215.3
254.3
889
944
1000
193.6
228.9
268.8
902
957
1012
206.5
242.7
283.4
915
969
1024
219.5
256.6
298.2
928
982
1036
232.6
270.5
313.0
CFM
OV
FPM
5" SP
RPM
BHP
48000
59000
70000
81000
1567
1926
2285
2644
569
591
622
659
56.8
65.7
77.9
93.1
617
635
661
695
71.1
80.3
93.0
109.1
677
700
730
96.2
109.1
125.9
718
737
764
113.1
126.2
143.5
809
830
163.5
181.3
876
893
204.3
222.6
92000
103000
114000
125000
3003
3362
3721
4080
700
744
791
839
111.3
132.5
156.7
183.9
734
776
820
867
128.5
151.2
177.1
206.3
766
806
849
894
146.3
170.2
197.7
228.6
798
835
876
920
164.7
189.8
218.6
251.2
858
892
930
971
203.7
230.6
261.7
297.1
917
947
981
1019
245.7
273.9
306.8
344.5
136000
147000
158000
4439
4798
5157
889
940
991
214.6
249.0
287.5
915
964
1015
238.9
275.2
315.4
940
989
1038
263.2
301.4
343.6
965
1012
287.5
327.6
1013
336.6
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
10" SP
RPM
BHP
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
954
267.3
1012
314.9
974
1000
1031
290.7
319.8
354.1
1029
338.9
18" SP
RPM
BHP
20" SP
RPM
BHP
Power ratings (BHP) do not include drive losses.
CHICAGO BLOWER CORPORATION
DESIGN 51
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
78-3/4 In. Wheel Diameter
37.49 Sq. Ft. Outlet Area
Peak BHP = 574.990 (RPM ÷1000) 3
Tip Speed (fpm) = 20.62 x RPM
807
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
3/4" SP
RPM
BHP
CLASS I
576 RPM
CLASS II
751 RPM
CLASS III 942 RPM
1" SP
RPM
BHP
1-1/2" SP
RPM
BHP
2" SP
RPM
BHP
2-1/2" SP
RPM
BHP
3" SP
RPM
BHP
3-1/2" SP
RPM
BHP
4" SP
RPM
BHP
CFM
OV
FPM
25000
38000
51000
64000
667
1014
1360
1707
138
181
230
281
1.5
3.2
6.2
11.0
165
203
247
294
2.5
4.7
8.1
13.2
190
222
263
308
3.6
6.3
10.2
15.6
213
240
278
321
4.8
7.9
12.3
18.2
256
275
306
346
7.6
11.0
16.5
23.5
306
333
369
14.5
20.6
28.8
336
359
390
18.4
24.9
34.0
364
383
412
22.7
29.3
39.2
391
406
433
27.2
34.1
44.4
428
453
39.1
49.8
77000
90000
103000
116000
2054
2401
2747
3094
333
386
439
492
18.0
27.7
40.5
56.9
344
395
447
500
20.6
30.7
43.8
60.6
355
404
455
507
23.3
33.7
47.3
64.4
366
414
463
514
26.2
36.9
50.8
68.3
389
433
480
529
32.4
43.8
58.2
76.4
410
453
497
544
38.7
51.0
66.2
84.9
429
471
514
559
45.1
58.4
74.4
93.8
447
488
530
574
51.5
65.8
82.9
103.1
465
504
545
588
57.8
73.3
91.3
112.5
483
520
560
602
64.0
80.7
99.9
122.1
129000
142000
155000
168000
3441
3788
4134
4481
546
600
653
707
77.3
102.1
131.8
166.9
552
606
659
712
81.4
106.6
136.7
172.2
559
611
664
717
85.5
111.2
141.7
177.6
565
617
670
722
89.8
115.8
146.7
183.0
579
629
681
733
98.6
125.3
156.9
194.0
592
641
692
743
107.7
135.1
167.4
205.2
605
653
703
753
117.3
145.2
178.2
216.7
619
666
714
763
127.2
155.8
189.4
228.4
632
678
725
773
137.4
166.7
200.9
240.5
646
690
736
783
147.8
177.8
212.7
252.9
181000
194000
207000
220000
4828
5175
5521
5868
761
815
869
923
207.8
255.0
308.9
369.9
766
820
873
927
213.6
261.0
315.3
376.8
771
824
878
931
219.3
267.3
322.0
383.8
775
828
882
935
225.1
273.5
328.5
390.8
785
837
890
236.8
286.0
341.8
794
846
898
248.8
298.7
355.3
803
855
906
261.0
311.6
369.0
813
863
914
273.4
324.8
382.8
822
872
923
286.1
338.1
396.9
832
881
931
299.2
351.8
411.2
CFM
OV
FPM
62000
75000
88000
101000
1654
2001
2347
2694
487
514
545
582
59.2
73.9
92.4
113.5
524
547
576
610
71.4
86.7
106.6
130.0
560
579
606
637
84.7
100.3
121.1
146.4
595
610
635
664
98.8
114.6
136.1
162.8
670
689
715
145.9
167.9
196.4
728
741
763
114000
127000
140000
153000
3041
3388
3734
4081
623
665
708
752
137.3
164.5
195.6
231.1
648
689
731
774
156.2
185.5
218.6
256.0
673
712
753
796
175.0
206.5
241.7
281.1
697
734
774
816
193.6
227.5
264.9
306.4
745
778
815
854
230.5
269.1
311.2
357.1
166000
179000
192000
205000
4428
4775
5121
5468
797
844
891
940
271.9
318.4
371.1
430.8
818
863
909
298.3
346.1
400.2
839
883
928
325.2
374.6
430.1
858
902
352.5
403.7
896
938
407.3
462.6
5" SP
RPM
BHP
6" SP
RPM BHP
7" SP
RPM
BHP
8" SP
RPM
BHP
SIZE
CHICAGO BLOWER SINGLE WIDTH AIRFOIL
807 RA
78-3/4 In. Wheel Diameter
37.49 Sq. Ft. Outlet Area
Peak BHP = 538.294 (RPM ÷1000) 3
Tip Speed (fpm) = 20.62 x RPM
CFM
OV
FPM
1/4" SP
RPM
BHP
1/2" SP
RPM BHP
25000
38000
51000
64000
667
1014
1360
1707
141
182
228
276
1.5
3.1
5.6
9.5
173
207
249
294
2.8
4.8
7.8
12.2
202
230
267
310
4.3
6.5
10.1
15.1
229
251
285
325
77000
90000
103000
116000
2054
2401
2747
3094
326
376
426
477
15.0
22.6
32.5
45.2
341
389
438
488
18.3
26.4
36.8
50.0
355
401
449
498
21.6
30.2
41.2
54.9
129000
142000
155000
168000
3441
3788
4134
4481
528
580
631
683
60.9
79.9
102.7
129.6
538
588
639
690
66.2
85.8
109.1
136.5
547
597
647
698
181000
194000
207000
220000
4828
5175
5521
5868
735
786
838
890
160.9
196.9
238.1
284.6
741
793
844
896
168.3
204.9
246.5
293.6
748
799
850
902
CFM
OV
FPM
5" SP
RPM
BHP
62000
75000
88000
101000
1654
2001
2347
2694
519
539
568
601
71.8
83.2
98.3
116.8
561
578
603
633
89.5
101.2
116.9
136.6
601
616
637
664
108.4
120.6
136.7
157.3
652
670
695
114000
127000
140000
153000
3041
3388
3734
4081
637
676
716
758
138.8
164.1
192.9
225.2
667
704
743
783
160.0
187.1
217.9
252.5
696
731
769
808
181.9
210.6
243.2
279.9
166000
179000
192000
205000
4428
4775
5121
5468
802
846
891
937
261.4
301.8
346.8
396.9
826
869
913
291.0
333.6
380.9
849
891
934
320.6
365.6
415.1
6" SP
RPM BHP
3/4" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
180.0
202.6
232.0
782
792
809
215.3
240.2
269.9
842
855
280.1
310.3
889
899
321.2
353.3
791
821
855
892
268.1
310.2
357.0
407.7
834
863
894
928
307.3
351.8
402.3
457.7
876
903
932
348.4
394.5
447.9
917
941
391.7
438.9
931
462.3
CLASS I
576 RPM
CLASS II
751 RPM
CLASS III
942 RPM
3" SP
RPM
BHP
6.0
8.4
12.4
17.9
290
318
353
12.8
17.3
23.7
327
348
380
17.8
22.6
29.6
360
378
406
23.4
28.4
35.9
406
430
34.7
42.6
433
454
41.6
49.6
459
477
48.9
57.1
368
413
460
508
25.0
34.2
45.6
59.8
393
436
481
527
31.9
42.1
54.7
69.9
417
458
500
545
38.8
50.2
63.8
80.1
440
478
519
562
45.9
58.2
73.0
90.4
462
498
538
579
53.2
66.4
82.2
100.8
483
518
555
596
60.7
74.7
91.5
111.1
504
536
573
612
68.6
83.2
100.8
121.5
71.6
91.7
115.6
143.5
556
605
655
705
77.1
97.7
122.1
150.5
574
622
670
719
88.1
109.8
135.2
164.6
591
637
685
733
99.4
122.0
148.4
178.9
607
652
699
746
110.7
134.4
161.9
193.4
622
667
713
759
122.2
147.0
175.4
208.0
638
681
726
772
133.7
159.6
189.1
222.7
653
695
739
784
145.2
172.3
202.8
237.5
175.8
212.9
255.1
302.7
755
806
856
907
183.3
220.9
263.6
311.8
768
818
868
918
198.5
237.2
280.9
330.1
781
830
880
929
213.8
253.5
298.3
348.5
794
842
891
940
229.3
270.0
315.8
367.0
806
854
902
244.9
286.6
333.4
818
865
913
260.6
303.4
351.2
830
877
924
276.5
320.2
369.1
10" SP
RPM
BHP
12" SP
RPM
BHP
14" SP
RPM
BHP
16" SP
RPM
BHP
141.4
157.8
178.9
720
734
754
186.2
203.4
225.3
794
810
253.6
275.9
851
864
307.1
330.7
916
389.1
724
758
794
832
204.6
234.6
268.9
307.5
779
809
842
877
252.5
284.7
321.8
363.6
832
858
888
921
304.0
337.8
377.1
421.7
883
906
933
359.2
394.1
435.1
932
418.2
871
912
350.3
397.6
915
410.3
Performance shown is for installation type B - Free inlet, Ducted outlet.
Performance ratings do not include the effects of appurtenances in the air stream.
3-1/2" SP
RPM
BHP
20" SP
RPM
BHP
2" SP
RPM
BHP
8" SP
RPM
BHP
2-1/2" SP
RPM
BHP
18" SP
RPM
BHP
1-1/2" SP
RPM
BHP
7" SP
RPM
BHP
1" SP
RPM
BHP
10" SP
RPM
BHP
18" SP
RPM
BHP
4" SP
RPM
BHP
20" SP
RPM
BHP
Power ratings (BHP) do not include drive losses.
25
Sound Levels
SOUND LEVELS
FAN SPEED - RPM
FAN
SIZE
700
800
900
135
150
165
29
32
35
32
35
38
35
38
41
38
41
44
42
46
49
46
50
53
50
53
56
53
56
59
56
59
62
60
64
67
64
68
71
68
71
74
71
74
77
182
200
222
38
41
44
42
44
48
45
47
51
47
50
53
52
55
58
56
59
62
59
62
66
62
65
69
65
68
71
70
73
76
74
77
80
77
80
84
81
83
–
245
270
300
42
45
48
45
48
52
48
51
55
51
54
58
56
59
63
60
63
67
64
67
70
67
70
74
70
73
76
75
78
81
79
–
–
–
–
–
–
–
–
2. Sound level computations are based on on a distance of
10' from the fan’s open inlet in a free field environment.
330
365
402
52
55
59
55
59
63
59
62
67
61
65
70
67
70
75
71
74
79
75
78
83
78
81
87
81
84
–
–
–
–
–
–
–
–
–
–
–
–
–
3. Specific octave band sound power levels and sound pressure levels available on request.
445
490
542
63
66
69
66
69
73
70
73
76
73
76
79
78
81
84
82
85
89
86
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
4. Sound levels of installed fans can vary greatly from laboratory tests. The dBA ratings are only to be used as
estimates. Any comparisons and detailed calculations
should be based upon sound power levels, which are
independant of the installation.
600
660
730
72
75
78
76
79
82
79
82
85
82
85
88
87
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
807
890
81
84
85
88
88
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Table lists estimated sound levels (dBA) for
each fan size at various speeds within the
fan’s normal operating range. To determine
dBA for a selected fan, locate the intersection
of the fan size and the closest RPM.
NOTES:
1. Sound levels are based on tests conducted in accordance with AMCA Standard 300, Set-Up No. 1.
1000 1200 1400 1600 1800 2000 2400 2800 3200 3600
5. AMCA Certified Ratings Seal applies to air performance
only.
Bearing Life
BEARING LIFE
CLASS I
Bearing life may be substantially increased or
decreased by variations in the operating
speed. The table at right lists the design
speeds (RPM) and fan sheave pitch diameters.
The graph below the table plots the increase
or decrease in bearing life when the RPM or
fan sheave pitch diameter is changed from the
values in the table. Minimum average bearing
life is 75,000 hours.
EXAMPLE:
Determine the increased bearing life of a Size
402 Class I fan operating at 785 RPM. Assume
the actual fan sheave pitch diameter of 18.7
inches.
1. Calculate operating RPM as a percent of the
design RPM.
785 RPM ÷ 1141 RPM = .688 x 100 =
68.8%. (Use 69%)
CLASS II
RPM
FAN SHEAVE
PITCH DIA.
135
150
165
3542
3246
2886
182
200
222
RPM
RPM
FAN SHEAVE
PITCH DIA.
5.4
5.9
6.6
4607
4221
3753
4.1
4.5
5.1
5794
5309
4721
R/F
R/F
4
2653
2355
2205
7.2
8.1
8.7
3437
3063
2868
5.6
6.2
6.7
4323
3853
3607
4.4
5
5.3
245
270
300
1991
1809
1663
9.6
10.6
11.5
2590
2353
2163
7.4
8.1
8.8
3258
2959
2720
6
6.5
7
330
365
402
1433
1318
1141
13.3
9.3
16.7
1863
1715
1483
10.3
11.1
12.9
2344
2157
1866
8.1
8.9
10.2
445
490
542
1043
939
858
18.3
20.3
22.3
1360
1224
1120
14
15.6
17.1
1706
1535
1404
11.2
12.4
13.6
600
660
730
775
695
637
24.6
27.5
30.0
1011
906
831
18.9
21.1
23.0
1268
1136
1042
15.1
16.8
R/F
807
890
576
518
33.2
29.5
751
675
25.4
22.6
942
847
R/F
R/F
R/F: Refer to Factory.
2. Calculate actual fan sheave pitch diameter
as a percent of the design fan sheave pitch
diameter in the table.
18.7" ÷ 16.7" = 1.11 x 100 = 111%
3. Locate the intersection of 69% of design
RPM and 111% of design fan sheave pitch
diameter in the graph. The increased bearing life is 10 times the design minimum
bearing life or 750,000 hours minimum
average life.
26
CLASS III
FAN SHEAVE
PITCH DIA.
FAN
SIZE
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Life Times 20.0
Life Times 15.0
Life Times 10.0
Life Times 7.0
Life Times 5.0
Life Times 3.0
Bearing Life
PERCENT OF CLASS MAXIMUM
CHICAGO BLOWER CORPORATION
DESIGN 51
CLASS I – Arrangements 1 and 9
BAU
CW
UB
CW
W
TAU
TH
CW
A
E
A
CC
W
A
45
BB
E
H
H
E
H
BH
CW
E
F/2
DD F/2
F/2
B
F/2
H
W
F/2
BB
F/2
F/2
K
W
A
F/2
T
U
S
H
Q
R
F/2
N/2
N
M
3/8
1/2
5/8
3/4
1
P
dia.
dia.
dia.
dia.
dia.
-
W
sizes
sizes
sizes
sizes
sizes
T
F
U
7 HOLES
SIDE ELEVATION
Q
R
U
F
F
W
A
F/2
S
T
L
G*
A
D
J*
U
B
W
CW
B
H
45
DISCHARGE & ROTATION AS VIEWED FROM DRIVE SIDE
D
DB
E
DD
A
H
F/2
F/2
CW
CC
W
45
TAD
CW
E
D
A
7 HOLES
135 - 182
200 - 300
330 - 365
402 - 730
807 - 890
M
T
EE
P
N
FOUNDATION PLAN
DB DISCHARGE
FOUNDATION PLAN
ALL DISCHARGES EXCEPT DB
FRONT ELEVATION
G* & J* DIMENSIONS SHOWN WITH
OPTIONAL SLIP INLET
CW UNIT SHOWN CCW OPPOSITE HAND
DIMENSIONS IN INCHES
E
H
FAN
SIZE
WHEEL
DIA.
SHAFT
AT
BEARINGS
KEYWAY
A
B
D
TH/BH
BAU/TAU
UB
TAD
F
135
150
165
13-7/32
14-9/16
16-3/16
1-7/16
1-7/16
1-11/16
3/8 x 3/16
3/8 x 3/16
3/8 x 3/16
14-1/8
15-13/16
17-3/16
10-1/2
11-1/2
12-3/4
12-1/2
13-3/4
15-1/4
11-5/16
12-1/16
12-7/8
16
17-7/8
18-1/4
17-1/8
19-1/8
20-1/4
20-5/16
20-1/16
23-3/16
182
200
222
17-13/16
19-11/16
21-9/16
1-11/16
1-11/16
1-11/16
3/8 x 3/16
3/8 x 3/16
3/8 x 3/16
19-1/8
20-3/4
23-7/16
14
15-3/4
17-3/16
16-3/4
18-3/4
20-7/16
13-7/8
15-3/8
16-5/16
20
22
24
22-1/4
25-1/4
27-1/8
22-15/16
23-1/4
25
245
270
300
24
26-7/16
29-1/8
1-11/16
1-11/16
1-15/16
3/8 x 3/16
3/8 x 3/16
1/2 x 1/4
25-9/16
28-3/16
31-9/16
19
20-7/8
22-15/16
22-11/16
24-15/16
27-3/8
18
19-1/4
20-7/8
28-13/16
30-13/16
33-7/8
33
35-1/2
38-3/4
25-7/8
28-1/4
30-7/8
23-3/4
25-7/16
27-7/8
23-3/4
23
26
330
365
402
32-3/8
35-9/16
39-3/8
1-15/16
1-15/16
2-3/16
1/2 x 1/4
1/2 x 1/4
1/2 x 1/4
34-3/8
38-5/16
42
25-3/8
27-7/8
30-3/4
30-5/16
33-1/4
36-3/4
22-9/16
24-5/8
27-1/2
35-11/16
38-15/16
42-3/8
41-7/8
45-1/4
51-1/4
34-1/2
37-3/4
41-7/8
30-13/16
33-3/4
37-1/4
445
490
542
43-7/16
48
52-7/8
2-3/16
2-3/16
2-7/16
1/2 x 1/4
1/2 x 1/4
5/8 x 5/16
46-1/2
51-1/16
56-13/16
33-7/8
37-3/8
41-1/16
40-1/2
44-11/16
49-3/16
30-1/16
32-15/16
36
45-3/8
48-13/16
53-3/16
54-3/4
59-1/2
63-1/4
45-7/8
50-5/16
55-3/8
600
660
730
58-1/2
64-3/4
71-3/16
2-11/16
2-15/16
2-15/16
5/8 x 5/16
3/4 x 3/8
3/4 x 3/8
62-13/16
68-11/16
76-3/8
45-3/8
50-3/16
55-1/8
54-5/16
60-1/8
66
39-9/16
44-1/16
48-1/8
57-13/16
63-13/16
69-1/16
69-1/8
75-7/8
82
807
890
78-3/4
87-1/8
3-15/16
RF
1 x 1/2
RF
84-1/2
92-3/4
60-15/16
RF
73
RF
53-3/8
59-1/4
81-1/2
RF
93-5/8
RF
FAN
SIZE
G
J
K
L
M
N
P
Q
R
S
135
150
165
13-7/16
15-7/16
16-9/16
6-15/16
7-7/16
8-1/8
28-7/32
28-3/4
34-25/32
3
3
3-1/2
18-7/8
18-7/8
23-3/4
10-11/16
11-3/4
13-1/16
1-1/2
1-1/2
1-1/2
6-7/32
6-3/4
7-13/32
8-27/32
9-3/8
10-1/32
182
200
222
18-9/16
20-9/16
22-9/16
8-3/4
9-1/2
10-1/4
35-7/16
36-11/16
40-9/16
3-1/2
3-1/2
4-1/4
23-3/4
24-1/4
26-5/8
14-3/8
15-7/8
17-3/8
1-1/2
2
2
8-1/16
9-1/16
9-13/16
245
270
300
24-9/16
27-9/16
30-9/16
11-1/4
12-3/4
13-13/16
41-9/16
43
46-3/4
4-1/4
4-3/4
4-3/4
26-5/8
26-5/8
29-1/4
19-3/8
21-5/16
23-1/2
2
2
2
330
365
402
33-9/16
36-9/16
41-9/16
15-1/8
16-7/16
17-15/16
48-9/16
49-7/8
53-3/4
4-3/4
4-3/4
5-1/2
29-3/4
29-3/4
31-3/8
26-1/8
28-3/4
31-3/4
445
490
542
44-9/16
49-9/16
53-5/8
19-9/16
21-7/16
24-1/16
55-3/8
64-11/32
72-3/16
5-1/4
6-3/4
8
31-3/8
37-1/4
41-3/4
600
660
730
59-3/8
65-7/8
71-7/8
26-3/8
29-3/8
35
76-1/2
79
81-5/8
8
7-3/4
7-3/4
807
890
79-1/2
88-1/4
38-7/16
RF
85-11/16
RF
7-3/4
RF
TAU
TAD
DB
24-5/8
27
29-5/8
23-3/4
23-1/8
26
23-3/4
25-1/4
27-15/16
23-3/4
23
26
26
28-5/16
31-1/4
32-13/16
35-15/16
39-11/16
28
30-11/16
33-13/16
29
31-7/8
34-5/8
26
25-1/8
28
41
45-3/16
49-11/16
34-3/8
37-13/16
41-9/16
43-5/8
48-1/8
53-1/8
37-3/16
41
45-1/16
37-1/8
39-5/8
43-3/8
30-9/16
33-7/16
36-1/2
60-7/8
67
73-5/16
54-13/16
60-5/8
66-1/2
45-7/8
50-11/16
55-5/8
58-3/8
64-9/16
70-7/8
49-3/4
54-15/16
60-5/16
47-1/16
51-1/16
56-1/8
40-1/16
44-9/16
48-5/8
81-11/16
RF
73-7/16
RF
61-3/8
RF
78-1/4
RF
66-5/8
RF
65-3/4
RF
53-7/8
RF
T
U
W
BB
CC
DD
EE
11-7/8
11-7/8
16-3/4
5-1/16
6-1/16
6-5/8
7-15/16
8-15/16
9-1/2
1-1/8
1-15/32
1-9/32
9-1/2
10-1/2
11-9/16
11-3/8
12-1/2
13-13/16
13-5/16
14-5/8
16-3/16
23-1/16
25-13/32
27-17/32
10-11/16
11-15/16
12-11/16
16-3/4
16-1/4
18-5/8
7-5/8
8-5/8
9-9/16
10-1/2
11-3/4
12-11/16
1-5/8
1-3/8
2-7/32
12-3/4
14-5/16
15-5/8
15-3/16
17
18-9/16
17-13/16
19-7/8
21-3/4
30-1/8
34
36-25/32
10-13/16
11-25/32
12-7/8
13-11/16
14-21/32
15-3/4
18-5/8
18-5/8
21-1/4
12-1/2
13-3/4
15-3/8
15-5/8
16-7/8
18-1/2
1-31/32
2-3/16
2-15/16
17-5/16
19
20-7/8
20-5/8
22-5/8
24-7/8
24-1/8
26-1/2
29-1/8
42-3/32
45-3/4
50
2-1/2
2-1/2
3
14-7/16
15-3/4
17-5/8
17-9/16
18-7/8
20-7/8
20-3/4
20-3/4
21-3/8
16-7/16
18-1/8
20-5/8
19-13/16
21-1/2
24-3/8
2-5/8
3-7/16
3-3/8
23-1/16
25-5/16
27-15/16
27-9/16
30-3/16
33-3/8
32-5/16
35-7/16
39-3/16
55-3/16
60
67-1/4
35
38-11/16
42-7/8
3
3
3
19-1/4
21-3/32
23-3/16
22-1/2
24-11/32
26-7/16
21-3/8
27-1/4
31-3/4
22-3/8
24-3/4
26-5/8
26-1/8
28-1/2
30-3/8
3-7/8
4
4-31/32
30-3/4
33-7/8
37-1/4
36-3/4
40-1/2
44-9/16
43-1/8
47-5/8
52-3/8
73
79-13/16
86-15/32
43-3/4
43-3/4
43-3/4
47-1/2
52-1/2
57-3/4
3
3
3
25-1/2
28
30-5/8
28-3/4
31-1/4
33-7/8
33-3/4
33-3/4
33-3/4
29-9/16
32-15/16
36
33-5/16
36-11/16
39-3/4
5-15/32
5-3/16
6-9/16
41-1/8
45-1/2
50
49-3/16
54-7/16
59-13/16
57-7/8
64-1/16
70-3/8
94-29/32
104-7/16
113-13/16
44-3/4
RF
63-7/8
70-11/16
4
RF
34-7/16
RF
37-15/16
RF
32-3/4
RF
40-13/16
RF
45-5/16
RF
7-5/16
RF
55-1/4
RF
66-1/8
RF
77-3/4
RF
128
RF
BH
UB
TH
BAU
DO NOT USE FOR CONSTRUCTION UNLESS CERTIFIED BY CHICAGO BLOWER CORPORATION. AUTOCAD DRAWINGS ARE AVAILABLE UPON REQUEST.
27
CHICAGO BLOWER CORPORATION
DESIGN 51
CLASS II – Arrangements 1 and 9
BAU
CW
UB
CW
W
TAU
TH
CW
A
E
A
CC
W
A
45
BB
E
H
H
E
H
BH
CW
E
F/2
DD F/2
F/2
B
F/2
H
W
F/2
BB
K
F/2
F/2
H
T
U
S
H
F/2
Q
R
Q
R
F/2
N/2
N
M
3/8
1/2
5/8
3/4
1
P
dia.
dia.
dia.
dia.
dia.
-
W
sizes
sizes
sizes
sizes
sizes
T
F
U
7 HOLES
SIDE ELEVATION
W
A
F/2
U
F
F
D
W
A
S
T
L
G*
A
CW
B
J*
U
B
W
45
DISCHARGE & ROTATION AS VIEWED FROM DRIVE SIDE
D
DB
E
DD
A
H
F/2
F/2
CW
CC
W
45
TAD
CW
E
D
A
7 HOLES
135 - 182
200 - 300
330 - 365
402 - 730
807 - 890
M
T
EE
P
N
FOUNDATION PLAN
DB DISCHARGE
FOUNDATION PLAN
ALL DISCHARGES EXCEPT DB
FRONT ELEVATION
G* & J* DIMENSIONS SHOWN WITH
OPTIONAL SLIP INLET
CW UNIT SHOWN CCW OPPOSITE HAND
DIMENSIONS IN INCHES
E
FAN
SIZE
WHEEL
DIA.
SHAFT
AT
BEARINGS
KEYWAY
A
B
135
150
165
13-7/32
14-9/16
16-3/16
1-11/16
1-11/16
1-15/16
3/8 x 3/16
3/8 x 3/16
1/2 x 1/4
14-1/8
15-13/16
17-3/16
10-1/2
11-1/2
12-3/4
182
200
222
17-13/16
19-11/16
21-9/16
1-15/16
1-15/16
1-15/16
1/2 x 1/4
1/2 x 1/4
1/2 x 1/4
19-1/8
20-3/4
23-7/16
245
270
300
24
26-7/16
29-1/8
1-15/16
1-15/16
2-3/16
1/2 x 1/4
1/2 x 1/4
1/2 x 1/4
330
365
402
32-3/8
35-9/16
39-3/8
2-3/16
2-3/16
2-7/16
445
490
542
43-7/16
48
52-7/8
600
660
730
807
890
H
D
TH/BH
BAU/TAU
UB
TAD
F
12-1/2
13-3/4
15-1/4
11-5/16
12-1/16
12-7/8
16
17-7/8
18-1/4
17-1/8
19-1/8
20-1/4
20-5/16
20-1/16
23-3/16
14
15-3/4
17-3/16
16-3/4
18-3/4
20-7/16
13-7/8
15-3/8
16-5/16
20
22
24
22-1/4
25-1/4
27-1/8
22-15/16
23-1/4
25
25-9/16
28-3/16
31-9/16
19
20-7/8
22-15/16
22-11/16
24-15/16
27-3/8
18
19-1/4
20-7/8
28-13/16
30-13/16
33-7/8
33
35-1/2
38-3/4
25-7/8
28-1/4
30-7/8
23-3/4
25-7/16
27-7/8
23-3/4
23
26
1/2 x 1/4
1/2 x 1/4
5/8 x 5/16
34-3/8
38-5/16
42
25-3/8
27-7/8
30-3/4
30-5/16
33-1/4
36-3/4
22-9/16
24-5/8
27-1/2
35-11/16
38-15/16
42-3/8
41-7/8
45-1/4
51-1/4
34-1/2
37-3/4
41-7/8
30-13/16
33-3/4
37-1/4
2-15/16
2-11/16
2-15/16
3/4 x 3/8
5/8 x 5/16
3/4 x 3/8
46-1/2
51-1/16
56-13/16
33-7/8
37-3/8
41-1/16
40-1/2
44-11/16
49-3/16
30-1/16
32-15/16
36
45-3/8
48-13/16
53-3/16
54-3/4
59-1/2
63-1/4
45-7/8
50-5/16
55-3/8
58-1/2
64-3/4
71-3/16
3-3/16
3-7/16
3-7/16
3/4 x 3/8
7/8 x 7/16
7/8 x 7/16
62-13/16
68-11/16
76-3/8
45-3/8
50-3/16
55-1/8
54-5/16
60-1/8
66
39-9/16
44-1/16
48-1/8
57-13/16
63-13/16
69-1/16
69-1/8
75-7/8
82
78-3/4
87-1/8
4-15/16
RF
1-1/4 x 5/8
RF
84-1/2
RF
60-15/16
RF
73
RF
53-3/8
59-1/4
81-1/2
RF
93-5/8
RF
BH
UB
TH
BAU
TAU
TAD
DB
24-5/8
27
29-5/8
23-3/4
23-1/8
26
23-3/4
25-1/4
27-15/16
23-3/4
23
26
26
28-5/16
31-1/4
32-13/16
35-15/16
39-11/16
28
30-11/16
33-13/16
29
31-7/8
34-5/8
26
25-1/8
28
41
45-3/16
49-11/16
34-3/8
37-13/16
41-9/16
43-5/8
48-1/8
53-1/8
37-3/16
41
45-1/16
37-1/8
39-5/8
43-3/8
30-9/16
33-7/16
36-1/2
60-7/8
67
73-5/16
54-13/16
60-5/8
66-1/2
45-7/8
50-11/16
55-5/8
58-3/8
64-9/16
70-7/8
49-3/4
54-15/16
60-5/16
47-1/16
51-1/16
56-1/8
40-1/16
44-9/16
48-5/8
81-11/16
RF
73-7/16
RF
61-3/8
RF
78-1/4
RF
66-5/8
RF
65-3/4
RF
53-7/8
RF
FAN
SIZE
G
J
K
L
M
N
P
R
S
T
U
W
BB
CC
DD
EE
135
150
165
13-7/16
15-7/16
16-9/16
6-15/16
7-7/16
8-1/8
28-7/32
28-3/4
34-25/32
3
3
3-1/2
18-7/8
18-7/8
23-3/4
10-11/16
11-3/4
13-1/16
1-1/2
1-1/2
1-1/2
6-7/32
6-3/4
7-13/32
8-27/32
9-3/8
10-1/32
11-7/8
11-7/8
16-3/4
5-1/16
6-1/16
6-5/8
7-15/16
8-15/16
9-1/2
1-1/8
1-15/32
1-9/32
9-1/2
10-1/2
11-9/16
11-3/8
12-1/2
13-13/16
13-5/16
14-5/8
16-3/16
23-1/16
25-13/32
27-17/32
182
200
222
18-9/16
20-9/16
22-9/16
8-3/4
9-1/2
10-1/4
35-7/16
36-11/16
40-9/16
3-1/2
3-1/2
4-1/4
23-3/4
24-1/4
26-5/8
14-3/8
15-7/8
17-3/8
1-1/2
2
2
8-1/16
9-1/16
9-13/16
10-11/16
11-15/16
12-11/16
16-3/4
16-1/4
18-5/8
7-5/8
8-5/8
9-9/16
10-1/2
11-3/4
12-11/16
1-5/8
1-3/8
2-7/32
12-3/4
14-5/16
15-5/8
15-3/16
17
18-9/16
17-13/16
19-7/8
21-3/4
30-1/8
34
36-25/32
245
270
300
24-9/16
27-9/16
30-9/16
11-1/4
12-3/4
13-13/16
41-9/16
42-17/32
46-3/4
4-1/4
4-1/4
4-3/4
26-5/8
26-5/8
29-1/4
19-3/8
21-5/16
23-1/2
2
2
2
10-13/16
11-25/32
12-7/8
13-11/16
14-21/32
15-3/4
18-5/8
18-5/8
21-1/4
12-1/2
13-3/4
15-3/8
15-5/8
16-7/8
18-1/2
1-31/32
2-3/16
2-15/16
17-5/16
19
20-7/8
20-5/8
22-5/8
24-7/8
24-1/8
26-1/2
29-1/8
42-3/32
45-3/4
50
330
365
402
33-9/16
36-9/16
41-9/16
15-1/8
16-7/16
17-15/16
48-9/16
49-7/8
53-3/4
4-3/4
4-3/4
5-1/2
29-3/4
29-3/4
31-3/8
26-1/8
28-3/4
31-3/4
2-1/2
2-1/2
3
14-7/16
15-3/4
17-5/8
17-9/16
18-7/8
20-7/8
20-3/4
20-3/4
21-3/8
16-7/16
18-1/8
20-5/8
19-13/16
21-1/2
24-3/8
2-5/8
3-7/16
3-3/8
23-1/16
25-5/16
27-15/16
27-9/16
30-3/16
33-3/8
32-5/16
35-7/16
39-3/16
55-3/16
60
67-1/4
445
490
542
44-9/16
49-9/16
53-5/8
19-9/16
21-7/16
24-1/16
55-3/8
64-11/32
72-3/16
5-1/4
6-3/4
8
31-3/8
37-1/4
41-3/4
35
38-11/16
42-7/8
3
3
3
19-1/4
21-3/32
23-3/16
22-1/2
24-11/32
26-7/16
21-3/8
27-1/4
31-3/4
22-3/8
24-3/4
26-5/8
26-1/8
28-1/2
30-3/8
3-7/8
4
4-31/32
30-3/4
33-7/8
37-1/4
36-3/4
40-1/2
44-9/16
43-1/8
47-5/8
52-3/8
73
79-13/16
86-15/32
600
660
730
59-3/8
65-7/8
71-7/8
26-3/8
29-3/8
35
76-1/2
79
81-5/8
8
7-3/4
7-3/4
43-3/4
43-3/4
43-3/4
47-1/2
52-1/2
57-3/4
3
3
3
25-1/2
28
30-5/8
28-3/4
31-1/4
33-7/8
33-3/4
33-3/4
33-3/4
29-9/16
32-15/16
36
33-5/16
36-11/16
39-3/4
5-15/32
5-3/16
6-9/16
41-1/8
45-1/2
50
49-3/16
54-7/16
59-13/16
57-7/8
64-1/16
70-3/8
94-29/32
104-7/16
113-13/16
807
890
79-1/2
88-1/4
38-7/16
RF
85-11/16
RF
7-3/4
RF
44-3/4
RF
63-7/8
RF
4
RF
34-7/16
RF
37-15/16
RF
32-3/4
RF
40-13/16
RF
45-5/16
RF
7-5/16
RF
55-1/4
RF
66-1/8
RF
77-3/4
RF
128
RF
Q
DO NOT USE FOR CONSTRUCTION UNLESS CERTIFIED BY CHICAGO BLOWER CORPORATION. AUTOCAD DRAWINGS ARE AVAILABLE UPON REQUEST.
28
CHICAGO BLOWER CORPORATION
DESIGN 51
CLASS III – Arrangements 1 and 9
BAU
CW
UB
CW
W
TAU
TH
CW
A
E
A
CC
W
A
45
BB
E
H
H
E
H
BH
CW
E
F/2
DD F/2
F/2
B
F/2
H
W
F/2
BB
K
F/2
F/2
H
T
U
S
H
F/2
Q
R
Q
R
F/2
N/2
N
M
3/8
1/2
5/8
3/4
1
P
dia.
dia.
dia.
dia.
dia.
-
W
sizes
sizes
sizes
sizes
sizes
T
F
U
7 HOLES
SIDE ELEVATION
W
A
F/2
U
F
F
D
W
A
S
T
L
G*
A
CW
B
J*
U
B
W
45
DISCHARGE & ROTATION AS VIEWED FROM DRIVE SIDE
D
DB
E
DD
A
H
F/2
F/2
CW
CC
W
45
TAD
CW
E
D
A
7 HOLES
135 - 182
200 - 300
330 - 365
402 - 730
807 - 890
M
T
EE
P
N
FOUNDATION PLAN
DB DISCHARGE
FOUNDATION PLAN
ALL DISCHARGES EXCEPT DB
FRONT ELEVATION
G* & J* DIMENSIONS SHOWN WITH
OPTIONAL SLIP INLET
CW UNIT SHOWN CCW OPPOSITE HAND
DIMENSIONS IN INCHES
E
FAN
SIZE
WHEEL
DIA.
SHAFT
AT
BEARINGS
KEYWAY
A
B
135
150
165
13-7/32
14-9/16
16-3/16
1-15/16
1-15/16
1-15/16
1/2 x 1/4
1/2 x 1/4
1/2 x 1/4
14-1/8
15-13/16
17-3/16
10-1/2
11-1/2
12-3/4
182
200
222
17-13/16
19-11/16
21-9/16
2-3/16
2-3/16
2-7/16
1/2 x 1/4
1/2 x 1/4
5/8 x 5/16
19-1/8
20-3/4
23-7/16
245
270
300
24
26-7/16
29-1/8
2-11/16
2-7/16
2-11/16
5/8 x 5/16
5/8 x 5/16
5/8 x 5/16
330
365
402
32-3/8
35-9/16
39-3/8
2-11/16
2-11/16
2-15/16
445
490
542
43-7/16
48
52-7/8
600
660
730
807
890
H
D
TH/BH
BAU/TAU
UB
TAD
F
12-1/2
13-3/4
15-1/4
11-5/16
12-1/16
12-7/8
16
17-7/8
18-1/4
17-3/8
19-3/8
20-1/2
20-1/2
20-1/4
23-1/4
14
15-3/4
17-3/16
16-3/4
18-3/4
20-7/16
13-7/8
15-3/8
16-5/16
20
22
24
22-1/2
25-1/2
27-3/8
23-1/4
23-5/8
25-13/16
25-9/16
28-3/16
31-9/16
19
20-7/8
22-15/16
22-11/16
24-15/16
27-3/8
18
19-1/4
20-7/8
28-13/16
30-13/16
33-7/8
33
35-1/2
38-3/4
25-7/8
28-1/4
30-7/8
24-9/16
25-7/16
28-3/8
24-7/8
23-7/8
28-3/8
24-5/8
27
29-5/8
5/8 x 5/16
5/8 x 5/16
3/4 x 3/8
34-3/8
38-5/16
42
25-3/8
27-7/8
30-3/4
30-5/16
33-1/4
36-3/4
22-9/16
24-5/8
27-1/2
35-11/16
38-15/16
42-3/8
41-7/8
45-1/4
51-1/4
34-1/2
37-3/4
41-7/8
30-13/16
33-3/4
37-1/4
28-1/8
28-5/16
31-1/4
2-15/16
3-3/16
3-7/16
3/4 x 3/8
3/4 x 3/8
7/8 x 7/16
46-1/2
51-1/16
56-13/16
33-7/8
37-3/8
41-1/16
40-1/2
44-11/16
49-3/16
30-1/16
32-15/16
36
45-3/8
48-13/16
53-3/16
54-3/4
59-1/2
63-1/4
45-7/8
50-5/16
55-3/8
41
45-3/16
49-11/16
58-1/2
64-3/4
71-3/16
3-11/16
3-11/16
RF
7/8 x 7/16
7/8 x 7/16
RF
62-13/16
68-11/16
RF
45-3/8
50-3/16
RF
54-5/16
60-1/8
RF
39-9/16
44-1/16
RF
57-13/16
63-5/16
RF
69-1/8
75-7/8
RF
60-7/8
67
RF
78-3/4
87-1/8
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
BH
UB
TH
BAU
TAU
TAD
DB
24-7/8
23-7/8
28-3/8
24-9/16
25-1/4
24-7/8
24-7/8
23-7/8
28-3/8
32-13/16
35-15/16
39-11/16
28-1/8
30-11/16
33-13/16
29
31-7/8
34-5/8
28-1/8
26-1/8
28
34-3/8
37-13/16
41-9/16
43-5/8
48-1/8
53-1/8
37-3/16
41
45-1/16
37-1/8
39-5/8
43-3/8
30-9/16
33-7/16
36-1/2
54-13/16
60-5/8
RF
45-7/8
50-11/16
RF
58-3/8
64-9/16
RF
49-3/4
54-15/16
RF
47-1/16
51-1/16
RF
40-1/16
44-9/16
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
FAN
SIZE
G
J
K
L
M
N
P
Q
R
S
T
U
W
BB
CC
DD
EE
135
150
165
13-7/16
15-7/16
16-9/16
6-15/16
7-7/16
8-1/8
28-7/32
28-3/4
34-25/32
3
3
3-1/2
18-7/8
18-7/8
23-3/4
10-11/16
11-3/4
13-1/16
1-1/2
1-1/2
1-1/2
6-7/32
6-3/4
7-13/32
8-27/32
9-3/8
10-1/32
11-7/8
11-7/8
16-3/4
5-3/16
6-3/16
6-3/4
8-1/16
9-1/16
9-5/8
1-1/8
1-15/32
1-9/32
9-1/2
10-1/2
11-9/16
11-3/8
12-1/2
13-13/16
13-5/16
14-5/8
16-3/16
23-3/16
25-17/32
27-21/32
182
200
222
18-9/16
20-9/16
22-9/16
8-3/4
9-1/2
10-1/4
35-7/16
36-11/16
40-9/16
3-1/2
3-1/2
4-1/4
23-3/4
24-1/4
26-5/8
14-3/8
15-7/8
17-3/8
1-1/2
2
2
8-1/16
9-1/16
9-13/16
10-11/16
11-15/16
12-11/16
16-3/4
16-1/4
18-5/8
7-3/4
8-3/4
9-11/16
10-5/8
11-3/8
12-13/16
1-5/8
1-3/8
2-7/32
12-3/4
14-5/16
15-5/8
15-3/16
17
18-9/16
17-13/16
19-7/8
21-3/4
30-1/4
34-1/8
36-29/32
245
270
300
24-9/16
27-9/16
30-9/16
11-1/4
12-3/4
13-13/16
41-9/16
42-17/32
47-1/4
4-1/4
4-1/4
4-3/4
26-5/8
26-5/8
29-1/4
19-3/8
21-5/16
23-1/2
2
2
2
10-13/16
11-25/32
12-7/8
13-11/16
14-21/32
15-3/4
18-5/8
18-5/8
21-1/4
12-1/2
13-3/4
15-3/8
15-5/8
16-7/8
18-1/2
1-31/32
2-3/16
2-15/16
17-5/16
19
20-7/8
20-5/8
22-5/8
24-7/8
24-1/8
26-1/2
29-1/8
42-3/32
45-3/4
50
330
365
402
33-9/16
36-9/16
41-9/16
15-1/8
16-7/16
17-15/16
48-9/16
49-7/8
53-3/4
4-3/4
4-3/4
5-1/4
29-3/4
29-3/4
30-3/8
26-1/8
28-3/4
31-3/4
2-1/2
2-1/2
3
14-7/16
15-3/4
17-5/8
17-9/16
18-7/8
20-7/8
20-3/4
20-3/4
21-3/8
16-7/16
18-1/8
20-5/8
19-13/16
21-1/2
24-3/8
2-5/8
3-7/16
3-3/8
23-1/16
25-5/16
27-15/16
27-9/16
30-3/16
33-3/8
32-5/16
35-7/16
39-3/16
55-3/16
60
67-1/4
445
490
542
44-9/16
49-9/16
53-5/8
19-9/16
21-7/16
24-1/16
55-3/8
64-11/32
72-3/16
5-1/4
6-1/2
7-3/4
30-3/8
37-1/4
41-7/8
35
38-11/16
42-7/8
3
3
3
19-1/4
21-3/32
23-3/16
22-1/2
24-11/32
26-7/16
21-3/8
27-1/4
31-3/4
22-3/8
24-3/4
26-5/8
26-1/8
28-1/2
30-3/8
3-7/8
4
4-31/32
30-3/4
33-7/8
37-1/4
36-3/4
40-1/2
44-9/16
43-1/8
47-5/8
52-3/8
73
79-13/16
86-15/32
600
660
730
59-3/8
65-7/8
71-7/8
26-3/8
29-3/8
35
76-1/2
79
RF
7-3/4
7-3/4
RF
44-1/8
44-1/8
RF
47-1/2
52-1/2
RF
3
3
RF
25-1/2
28
RF
28-3/4
31-1/4
RF
33-3/4
33-3/4
RF
29-9/16
32-15/16
RF
33-5/16
36-11/16
RF
5-15/32
5-3/16
RF
41-1/8
45-1/2
RF
49-3/16
54-7/16
RF
57-7/8
64-1/16
RF
94-29/32
104-7/16
RF
807
890
79-1/2
88-1/4
38-7/16
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
RF
DO NOT USE FOR CONSTRUCTION UNLESS CERTIFIED BY CHICAGO BLOWER CORPORATION. AUTOCAD DRAWINGS ARE AVAILABLE UPON REQUEST.
29
Unitary
Base
NOTES:
Dimensions shown (in inches) are for
clock- wise rotation, top angular up
discharge fans with maximum motor
frame in position “Z”.
Dimensions for counterclockwise rotation, other discharge positions or other
motor frames will vary. Dimensions are
not for construction unless certified.
Approximate weights include fan, base,
motor, V-belt drive, and belt guard. For
belt drive centers, consult your Chicago
Sales Engineer.
30
TW
Weight
(lbs.)
Max.
Motor
Frame
45-5/8
47-5/8
53-1/4
621
725
846
254T
256T
284T
6
6
6
55-1/4
60-3/4
62-5/8
957
1276
1508
286T
324T
326T
33-1/2
36
39-1/4
6
6
6
68-1/2
71
76-9/16
1643
1769
2187
326T
326T
365T
66-1/16
68-7/8
74-5/8
42-3/8
45-3/4
51-3/4
6
8
8
79-11/16
87-5/8
96-1/2
2398
3020
4054
365T
405T
444T
76
86-19/32
96-11/16
78
88-19/32
98-11/16
55-1/4
60
63-3/4
8
8
8
100
104-3/4
108-1/2
4623
5240
5814
445T
445T
447T
103-1/4
108-1/4
113-5/8
105-1/4
110-1/4
115-5/8
69-5/8
76-3/8
82-1/2
8
8
8
114-3/8
121-1/8
127-1/4
6679
7622
7863
447T
449T
445T
94-1/8
118-3/8
8
8
138-7/8
149-1/8
11330
12127
449T
449T
Fan
Size
F
JK
TT
TL
CH
135
150
165
37-1/2
38-23/32
43-9/16
35-3/32
36-1/8
42-25/32
37-3/32
38-1/8
44-25/32
17-5/8
19-5/8
20-3/4
6
6
6
182
200
222
45-7/16
48-3/16
52-11/32
44-3/16
46-11/16
51-3/16
46-3/16
48-11/16
53-3/16
22-3/4
25-3/4
27-5/8
245
270
300
53-31/32
55-7/8
62-5/8
53-3/16
55-5/32
60-1/2
55-3/16
57-5/32
62-1/2
330
365
402
66-13/32
72-3/4
80-9/16
64-1/16
66-7/8
72-5/8
445
490
542
88-19/32
97-9/16
107-3/16
600
660
730
118-9/32
131
146-1/4*
807
890
162-3/4* 121-11/16 123-11/16
140-1/4
179-1/8* 138-1/4
* Shipped as a split housed fan. Maximum dimension to top of wheel;
Size 730 - 110", Size 807 - 120", Size 890 - 130"
CHICAGO BLOWER CORPORATION
DESIGN 51
Centrifugal Airfoil Fans
Design 51 Single Width
Engineering Specifications
General:
Provide a high performance, low maintenance, centrifugal
fan with airfoil wheel and hyperbolic wheel cone. Fan
shall be tested according to AMCA Standard 210 for air
performance and AMCA Standard 300 for sound performance. Fans must be manufactured and assembled in the
U.S.A. Acceptable vendors: Chicago Blower Corporation
Factory Mounted Motors
and Drives: (As Required)
Motors and drives to be factory mounted. Unit to be tested at running speed for vibration and balance. Filtered
vibration readings, taken at bearings, not to exceed .15
inches per second.
Inlet Volume Control: (As Required)
Performance:
Performance shall include steep pressure and non-overloading horsepower characteristics. Mechanical efficiency
shall be no less than 80%. Wheel inlet cone to be
designed to ensure smooth, stable air flow across the
entire operating range. System static pressure changes of
30% shall result in no more than 10% volume reduction.
Inlet volume control (IVC) device shall be totally enclosed
within the inlet cone. IVC device shall be 7-bladed, and
pre-spin the incoming air to control volume and pressure.
Operation of IVC shall be smooth without fluttering of
blades. Performance control shall be repeatable and
consistant without slip or hunting for required duty.
Accessories:
Housing:
• Slip fit inlet
Fan housing and base shall be of welded, heavy gauge
construction with seven common discharge positions.
Scroll is to be continuously welded air-tight and housing
stiffeners and base to be welded construction. Bolted
stiffeners and construction of structural members is strictly
prohibited.
• Flanged Inlet or Outlet - Punched Holes
• Companion Flange - Punched or Unpunched - Inlet,
Outlet or Both
• Type “A”, “B”, “C” AMCA Spark Resistant Construction
• 1-1/2" NPT Housing Drain
• Shaft Seal
Rotor:
• Quick Clamp, Bolted, or Plug Raised Access Door
Wheel shall have cast iron hub lock-bolted to a heavy
backplate. Blades must be single sheet continuously welded to the backplate and hyperbolic wheel cone. Wheels
to be dynamically balanced to G 6.3 standards in accordance with ISO 1940 and ANSI S2.19 specifications. Shaft
shall be turned, ground and polished 1045 hot rolled
steel straightened to a maximum T.I.R. of .002 inches and
mounted using pillow block bearings. Shaft critical speed
shall not be less than 1.2 times maximum RPM.
• Inlet Screen
Mounting:
Housing assembly complete with integral mounting angles
for connection to foundation. Adjustable motor base to
be welded to base (accessory).
• Shaft Cooling Wheel with Guard
(Required from 300°F - 800°F)
• Adjustable Motor Base
• Shaft and Bearing Guard with Extended Grease Fittings
• Totally Enclosed Belt Guard with Ventilation Panel
• Constant or Adjustable Speed V-Belt Drives minimum 1.2 S.F.
• Outlet Damper - Parallel or Opposed Blades. Manual
Operation with Locking Quadrant or Automatic with
Actuators available
• Unitary Base: Heavy channel construction, continuously
welded, with fan and motor base welded to insure
vibration-free service.
• Horizontal Split Housing
31
Printed in USA
May 2011