for Pleasant & Healthy www.dasco.com.kw Air-Distribution ISO 9001:2000 Product Bulletin 132-D Ceiling Diffusers Pleasant .. Serene.. YOU & DASCO... Since 1964 Partners for good health www.dasco.com.kw INTRODUCTION where a high standard of comfort indoor air quality and controlled performance are to be achieved . DASCO diffusers are specially designed for ceiling – mounting applications. They are suitable for supply air as well as exhaust air, www.dasco.com.kw Ceiling diffusers are the excellent choice for your HVAC system providing a stable pattern of air diffusion flowing through a number of concentrically arranged sections. Controlled air distribution, flow equalization, sound attenuation, architectural appearance and solid construction are all reasonable and worthwhile reasons to choose DASCO CEILING DIFFUSERS 1 Introduction CEILING DIFFUSERS GENERAL DASCO ceiling diffusers DD-6 are designed to handle a wide range of horizontal airflows that will meet all HVAC requirements, and yet with a pleasing appearance to suit architectural requirements to flush outlets and concealed fixing method. DESCRIPTION Ceiling Diffuser (One Way) DASCO ceiling diffusers DD-6 is a multi-vane type with a fully removable core from its face for easy installation, with square or round neck and can be supplied in 1,2,3 &4 way airflow patterns for all air distribution requirements. Ceiling Diffuser (Three Way) Ceiling Diffuser (Two Way) The diffuser can also be supplied with an opposed blade damper section (for supply diffusers only) which in turn is fixed to the outer frame of the diffuser and is lever operated from the face of the diffuser. Key operated opposed blade damper can also be supplied upon request. The damper frame is separated from its blades by using nylon bushings to eliminate corrosion and vibration. Ceiling diffuser DD-6 is available in square and rectangular patterns for supply air as well as for return air and which in turn is supplied without opposed blade damper as standard. Ceiling Diffuser (Four Way) 2 Ceiling Diffusers DASCO ceiling diffusers DD-6 is available in surface mounted type as optional. To identify the surface mounted diffuser, code SM to be added. Ceiling diffuser DD-6 is available with an extended frame to suit the size of ceiling tiles, the code to be added is EF. Ceiling diffusers with extended panels can also be supplied upon request, and to identify the extended panels ceiling diffusers, code EP to be added. www.dasco.com.kw SPECIAL MODELS: Ceiling Diffuser (Corner) MATERIAL AND FINISH Ceiling Diffuser (Special Architectural Shape) High quality complete extruded aluminium construction in silver anodized matt finish. White polyester powder coating finish or any other RAL standard colour are also available upon your requirement. ORDERING CODE Supply Air Ceiling Diffuser DD - 6 a - b - WxH 1,2,3,or 4 way airflow patterns S :Square type L :Rectangular type C :Corner type W x H = Neck size, ( inch or mm ) NOTE : When specifying a return air ceiling diffuser, use the symbol DDR instead of DD. 3 Ceiling Diffusers DEFINITIONS Jet Velocity (Vk) : In FPM for an outlet or inlet is the velocity measured with an approved calibrated velometer at specified locations relative to the face of the outlet or inlet. Terminal Velocity(Vt) : In FPM is the highest sustained velocity in the mixed air stream arbitrary specified and used to determine throw. Velocity pressure (Pd) : The forward moving force of an air stream within a duct measured in mm (inch) W.G. of water. ( Dynamic pressure) Static pressure (Ps) : The outward force within a duct measured in mm (inch) W.G. of water. Total pressure (Pt) : The sum of the velocity pressure and the static pressure measured in mm (inch) W.G. of water. Throw : Of an outlet in m (feet), is the distance from the center of the outlet to a point in the mixed air stream where the highest sustained velocity of the mixed air stream has been reduced to a specified level (100 FPM & 50 FPM terminal velocity). Area factor ( Ak) : Of an outlet or inlet which is also a flow factor determined from the discharge or intake velocity (Vk) and the volume flow rate (Q) Ak = Q/Vk in m2 or Ft2 Ceiling Diffuser With an Extended Frame (Woodall Colour) 4 Ceiling Diffusers • • • The sound caused by an air outlet is directly proportional to the velocity of the air passing through it (see table 1). Noise criteria : The sound pressure level of 8 octave bands acceptable to human ears and is estimated from table 2. The room effect : Is the difference between the sound power level of a terminal and the sound pressure level sensed by human ears in the room, and is affected by room size, sound absorption characteristic of the room surfaces, ceiling height, space volume, distance of listener to terminal, terminal location and number of terminals. www.dasco.com.kw NOISE CRITERIA Ambient Sounds : a. b. c. Environmental sound – Existing within the space with air conditioning equipment off. External sound – Entering a space from outdoors. Intruding sound – Entering from adjacent spaces. Prior to selection of NC level from table 2, the three ambient sounds above must be considered. APPLICATION Broadcasting studios, sound and recording studios. Concert halls, Auditoriums, Library, Classrooms Apartments, residences, hotel bedrooms, theatres, private offices, hospitals, churches. Large office, restaurants, hotels, dining rooms, public buildings. Corridors, computer – rooms, cafeterias, department stores. Average factories, workshops, garages Warehouses. Recommended Delivery Velocities (m/s) 1.5 - 2.5 2.5 - 3.5 2.5 - 4.5 3.5 - 5.5 4.5 - 6 5 - 10 Table 1 :The recommended delivery velocities for different applications (ASHRAE GUIDE ) 5 Noise Criteria RECOMMENDED NOISE CRITERIA FOR ROOMS Table 2 :The recommended NC level for different applications (ASHRAE GUIDE) 6 Noise Criteria ENGINEERING DATA The following tables could be helpful before starting the selection of ceiling diffusers. CEILING HEIGHT (Ft) MAX TEMP DIFF.(Fº ) 8 22 10 SIZE (Inch) MAX CFM PER SIDE CFM Range 63 - 200 250 9X9 140 - 450 26 500 12 14 28 30 850 1400 12 X 12 15 X 15 250 - 800 390 - 1250 18 X 18 562 - 1800 16 18 30 32 1800 2700 21 X 21 765 - 2480 24 X 24 1000 - 3200 Table No.3: Maximum CFM per side of the diffuser as a function of the ceiling height. www.dasco.com.kw 6X6 Table 4 : CFM range for square ceiling diffusers ( Minimum value is for 250 FPM neck velocity ) NOMINAL WIDTH (Inch) 9 6x9 12 6x12 15 6x15 18 6x18 21 6x21 24 6x24 6 9x9 9x12 9x15 9x18 9x21 9x24 9 12x12 12x15 15x15 12x18 15x18 12x21 15x21 12x24 15x24 12 15 18x18 18x21 18x24 18 21x21 21x24 24x24 21 24 Table No.5: Listed sizes available for Ceiling Diffusers. NOMINAL WIDTH (Inch) 9 12 15 18 21 24 0.096 0.144 0.17 0.2 0.24 0.27 0.13 6 0.2 0.26 0.35 0.32 0.43 0.54 0.37 0.5 0.61 0.43 0.57 0.71 0.48 0.64 0.8 9 12 15 0.77 0.86 1.04 0.97 1.13 1.34 18 21 24 Table No. 6: Area Factor AK (Ft2) for ceiling diffusers. NOMINAL HEIGHT (Inch) 6 NOMINAL HEIGHT (Inch) 6 6x6 7 Engineering Data SELECTION PROCEDURE GENERAL In general the selection of any air distribution equipment starts from a given CFM that is to be distributed by this equipment. The distance of throw and the sound level are two other important factors that have to be considered. A selection procedure of the diffuser best suited for your application is detailed hereunder. 1. 2. 3. 4. 5. Select the style best suited of your design from air flow patterns showing in chart (1). Refer to table 3 for fixing the maximum CFM in any direction for the given ceiling height. Find the maximum allowable total CFM for the diffuser to be selected. Enter the selection tables with the value of the CFM you have, and select the best suited throw, CFM delivered in the A&B directions and NC level which meet your application. The jet velocity can be calculated using Vk (FPM) = CFM/Ak Ak is given in table 6. Vk is used for balancing purposes at site. AVAILABLE AIR FLOW PATTERNS Select among the available Square / Rectangular core styles with 1,2,3 or 4 way airflow patterns to suit air distribution requirements . (Square / Rectangular to round adapters are also available as an option ) Square DD-64 S DD-63 S DD-62 S DD-61 S DD-62 C Chart 1 : Airflow pattern and product code(Square Ceiling Diffusers) Rectangular DD-61 W DD-62 W DD-62 L DD-64 L DD-63 L 8 Selection Procedure DD-61 L DD-62 CL DD-62 CL DD-63L Chart 2 : Airflow pattern and product code. (Rectangular Ceiling Diffusers) A library hall 10 ft. high with the dimensions shown on the figure is supplied with 3600 CFM of air. Select the diffusers that would fit this application . Divide the space into six equal areas as shown and center one outlet in each area so that 1. each outlet will handle 600 CFM . Note that since the areas are (approximately) square, a square diffuser would best suit the application. 2. CFM in A direction: 25 X600 = 150 CFM 100 www.dasco.com.kw SAMPLE PROBLEM CFM in B direction: 25 X600 = 150 CFM 100 The CFM per direction when checked in table 3 proves to be within the table recommended value . Reading under 600 CFM from the selection table a 12”x12” diffuser is a satisfactory selection . • • • Throw in A direction = Throw in B direction = 16 – 22 Ft. Supply N.C. is 35 Supply static pressure drop is 0.104” W.G. 1- Way Ceiling Diffuser ( Woodall Colour ) 4- Way Ceiling Diffuser ( Woodall Colour ) 9 Selection Procedure BASIC PERFORMANCE DATA (Supply Air Ceiling Diffusers) SQUARE & RECTANGULAR NECK B A A NECK VELOCITY $P(s) B A B A B A B A B A B A B A B 250 300 400 500 600 700 800 0.018 0.026 0.046 0.072 0.104 0.142 0.186 SIZE NECK PATTERN CFM 63 75 S.NC <18 <18 SCFM 16 16 19 19 31 31 37 37 4 -7 5-9 6 - 11 8 - 12 9 - 13 10 - 14 11-15 SCFM 24 16 28 19 38 25 47 31 52 37 66 44 75 50 SCFM -32 -38 -50 -63 -75 -88 -100 THROW 8-12 9-13 11-15 12-17 14-19 14-20 15-21 SCFM - 63 - 75 - 100 - 125 - 150 - 175 - 200 13-17 14-19 15-12 16-22 17-24 18-26 19-28 AREA DD-64S 6 DD-63S X DD-62S 6 DD-61S SIZE NECK PATTERN AREA DD-64S 9 X 0.56 DD-63S DD-62S 9 DD-61S SIZE THROW THROW 100 125 150 175 200 19 23 27 32 36 25 25 44 44 50 50 CFM 140 169 225 281 338 394 450 S.NC <18 18 22 27 31 37 40 SCFM 35 35 THROW SCFM 42 42 7-12 8-13 56 70 10-14 70 84 84 12-16 13-17 105 70 127 84 98 98 14-18 15-19 84 56 10-14 7-12 11-15 8-13 13-17 10-14 14-18 12-16 - 70 - 85 - 113 - 141 - 168 - 197 - 225 THROW 12-16 13-17 15-19 16-21 17-24 18-26 19-27 SCFM - 140 - 169 - 225 - 281 - 338 - 394 - 450 THROW 16-22 17-24 19-27 20-29 22-31 23-32 25-34 SCFM 148 98 15-20 13-17 16-22 14-18 169 17-24 15-19 CFM 250 300 400 500 600 700 800 AREA S.NC <18 20 26 31 35 40 44 SCFM 63 63 12 X 12 1.0 DD-63S DD-62S DD-61S THROW SCFM THROW 11-15 94 63 13-17 11-15 SCFM - 125 75 75 100 100 12-16 14 -18 15 - 20 16 - 22 17 - 23 18 - 24 112 75 150 100 188 125 225 150 263 175 300 200 14-19 12-16 16-22 14-18 17-23 15-20 19-25 11-22 20-27 17-23 - 150 - 200 125 - 125 150 150 175 175 X 6 SIZE 9 112 NECK PATTERN DD-64S 6 112 112 63 42 THROW 53 35 56 SIZE X 9 SIZE 200 200 21-29 18-24 250 - 300 - 350 - 400 THROW 15-20 16-22 18-24 19-28 21-29 21-31 24-33 SCFM - 250 - 300 - 400 - 500 - 600 - 700 - 800 THROW 19-28 21-29 24-33 26-36 28-38 29-41 30-44 12 X 12 Note SIZE : Is the nominal neck size in inches. NICK AREA : Is in square feet. PATTERN : Is flow pattern as detailed previously. 10 Performance Data P(s) : Supply pressure drop in inches W.G. SCFM : Side CFM. THROW : IN feet corresponding to 100 & 50 FPM terminal velocity. : Room NC for supply based on 8 db SNC room effect. BASIC PERFORMANCE DATA (Supply Air Ceiling Diffusers) SQUARE & RECTANGULAR NECK A A NECK VELOCITY SIZE NECK PATTERN AREA DD-64S 15 DD-63S X DD-62S 15 DD-61S SIZE NECK PATTERN DD-64S 18 DD-63S X DD-62S 18 DD-61S SIZE NECK PATTERN AREA 21 X 21 DD-64S DD-63S DD-62S DD-61S A B A B A B A B A B A B 300 400 500 600 700 800 0.018 0.026 0.046 0.072 0.104 0.142 0.186 CFM 390 469 625 781 938 1095 1250 S.NC 19 22 28 33 37 44 49 117 117 156 156 195 195 234 234 273 273 312 312 16 - 19 18 - 22 19 - 24 20 - 27 21- 28 22 -29 234 156 293 195 352 234 411 273 469 312 - 625 SCFM THROW 98 98 14 -18 SCFM 146 98 SCFM - 195 - 235 - 313 - 391 - 469 - 548 THROW 176 117 19 - 24 20 - 27 22 - 29 22 - 31 23 - 33 24 - 35 26 - 39 SCFM - 390 - 469 - 625 - 781 - 938 - 1095 - 1250 THROW 22-31 23-33 26-39 27-42 29-46 30-48 32-51 562 675 900 1125 1350 1575 1800 CFM S.NC AREA B 250 $P(s) B A SCFM THROW SCFM <18 141 24 141 17 - 22 211 141 168 30 168 225 20 - 23 253 168 225 22 - 27 338 35 40 45 51 281 281 337 337 394 394 450 450 23 - 29 225 422 281 26 - 32 591 394 -675 - 788 28 - 33 675 - 281 - 338 - 450 THROW 23-29 25-31 28-33 28-34 30-36 31-38 32-40 SCFM - 562 - 675 - 900 - 1125 - 1350 - 1575 - 1800 THROW 28-34 30-36 32-40 33-43 35-47 36-50 38-54 CFM 765 919 1225 1530 1838 2144 2450 S.NC 22 25 30 36 42 48 54 613 613 191 191 THROW 20 - 26 SCFM 287 191 230 230 306 23 - 27 345 230 306 26 - 32 459 306 383 383 -900 460 460 536 536 28 - 34 29 - 37 31 - 38 33 - 40 574 383 690 460 804 536 919 613 SCFM - 383 - 460 - 613 - 675 - 919 - 1072 - 1225 THROW 28-34 29-37 33-40 34-42 36-45 36-46 38-48 SCFM - 765 - 919 - 1225 - 1530 - 1838 - 2144 - 2450 34 - 42 36 - 45 38 - 48 39 - 50 41 - 53 42 - 55 44 - 58 THROW 15 X 15 SIZE 18 450 SCFM SCFM - 563 25 - 31 506 337 SIZE www.dasco.com.kw B X 18 SIZE 21 X 21 Note SIZE : Is the nominal neck size in inches. NICK AREA : Is in square feet. PATTERN : Is flow pattern as detailed previously. P(s) : Supply pressure drop in inches W.G. SCFM : Side CFM. THROW : IN feet corresponding to 100 & 50 FPM terminal velocity. SNC : Room NC for supply based on 8 db room effect. 11 Performance Data BASIC PERFORMANCE DATA (Supply Air Ceiling Diffusers) SQUARE & RECTANGULAR NECK B A A NECK VELOCITY $P(s) B SIZE NECK PATTERN CFM DD-64S DD-63S X DD-62S 24 DD-61S SCFM B DD-63L A B A B A B A B 600 700 800 0.018 0.026 0.046 0.072 0.104 0.142 0.186 1000 1200 1600 2000 2400 2800 3200 22 26 31 37 43 49 55 800 800 250 250 300 300 400 400 500 500 600 600 700 700 23 - 29 26 - 30 29 - 35 31 - 37 32 - 40 34 - 43 37 - 47 SCFM 375 250 450 300 600 400 750 600 900 600 1050 700 1200 800 SCFM - 500 - 600 - 800 - 1000 - 1200 - 1400 - 1600 THROW THROW 30 - 36 34 - 39 37 - 45 38 - 47 41 - 49 44 - 54 46 - 58 SCFM - 1000 - 1200 - 1600 - 2000 - 2400 - 2800 - 3200 THROW 35- 42 39 - 46 41 - 50 44 - 54 47 - 58 50 -61 52 - 64 150 188 226 262 300 20 24 28 33 37 94 X B 500 <18 DD-64L A 400 S.NC 6 B 300 SIZE NECK PATTERN CFM AREA A 250 S.NC AREA 24 A SCFM THROW SCFM 31 6-11 16 39 19 37 5-8 7-12 19 25 50 5-9 9-14 47 25 63 31 63 6-11 10-14 31 79 37 76 7-12 12-16 37 95 44 87 8-13 13-17 44 109 50 50 - 75 - 94 - 113 - 131 - 150 8 - 13 9 - 14 11- 16 13 - 17 14 - 18 15 - 20 16 - 21 - 94 - 113 - 150 - 188 - 226 - 267 - 300 13 - 17 14 - 18 16 - 21 17 - 22 18 - 24 18 - 25 19 - 26 SIZE NECK PATTERN CFM 125 150 200 250 300 350 400 S.NC <18 19 23 28 32 38 43 DD-61L AREA 6 X 12 DD-64L DD-63L DD-62L DD-61L THROW SCFM THROW SCFM 16 47 THROW 4-7 8-13 SCFM 16 SCFM THROW SCFM THROW 55 19 56 5-8 9-14 25 75 31 94 5-9 11-16 6-11 13-17 19 66 25 88 37 113 44 131 X 24 SIZE 6 125 - 56 DD-62L 24 100 9-14 14-18 - 47 9 SCFM 16 4-7 113 <18 SIZE 50 X 9 SIZE 150 7-12 14-18 8-13 15-20 9-14 16-21 31 110 37 132 44 153 50 175 - 63 - 75 - 100 - 125 - 150 - 175 - 200 10 - 14 11 - 16 14 - 18 15 - 20 16 - 21 16 - 22 17 - 23 - 125 - 150 - 200 - 250 - 300 - 350 - 400 15 - 20 16 - 21 17 - 23 18 - 24 19 - 26 20 - 27 20 - 29 6 X 12 Note SIZE : Is the nominal neck size in inches. NICK AREA : Is in square feet. PATTERN : Is flow pattern as detailed previously. 12 Performance Data P(s) : Supply pressure drop in inches W.G. SCFM : Side CFM. THROW : IN feet corresponding to 100 & 50 FPM terminal velocity. SNC : Room NC for supply based on 8 db room effect. BASIC PERFORMANCE DATA (Supply Air Ceiling Diffusers) SQUARE & RECTANGULAR NECK A A NECK VELOCITY $P(s) B A B A B A B A B A B A B A B 250 300 400 500 600 700 800 0.018 0.026 0.046 0.072 0.104 0.142 0.186 SIZE NECK PATTERN CFM 156 188 250 312 376 438 500 S.NC <18 19 25 30 34 39 44 AREA DD-64L 6 DD-63L X DD-62L 15 DD-61L SCFM 16 THROW 4-7 10-14 SCFM SCFM THROW SCFM THROW 62 16 70 19 75 25 100 5-8 11-16 31 125 37 151 5-9 14-18 6-11 15-20 7-12 16-21 19 85 25 113 31 141 37 170 44 175 8-13 16-22 44 197 50 200 9-14 17-23 - 88 - 94 - 125 - 156 - 188 - 219 - 250 12 - 17 13 - 18 15 - 20 16 - 21 17 - 22 18 - 23 18 - 24 - 156 - 188 - 250 - 312 - 376 - 438 - 500 16 - 21 17 -22 18 -24 19 -26 20 -27 21-29 22-31 188 225 300 375 450 526 600 S.NC <18 20 26 31 35 40 46 DD-64L 6 DD-63L X DD-62L 18 DD-61L SCFM THROW SCFM SCFM THROW SCFM THROW SIZE NECK PATTERN CFM S.NC AREA 6 X 21 DD-64L DD-63L DD-62L DD-61L SCFM THROW 16 78 4-7 12-16 16 86 19 94 25 125 5-8 13-17 5-9 15-20 19 25 103 138 31 157 6-11 16-21 31 172 37 188 44 219 7-12 17-22 8-13 18-23 37 207 44 241 50 275 - 113 - 150 - 188 - 225 - 263 - 300 13 - 18 14 - 19 16 - 21 17 - 22 18 - 23 19 - 24 19 - 26 - 188 - 225 - 300 - 375 - 450 - 526 - 600 17 - 22 18 - 23 19 - 26 20 - 27 21 - 29 22 - 31 23 - 33 219 262 350 438 524 612 700 18 22 28 33 37 42 47 16 94 19 112 25 150 31 188 37 225 44 262 4-7 13-18 5-8 14-19 5-9 16-21 6-11 17-22 7-12 18-23 8-13 19-24 9-14 19-26 19 25 163 31 204 37 244 44 284 50 325 16 102 SCFM - 100 - 131 - 175 - 219 - 262 - 306 - 350 14 - 18 15 - 20 16 - 22 18 - 22 19 - 24 19 - 26 20 - 27 - 219 - 262 - 350 - 438 - 524 - 612 - 700 18 - 23 19 - 24 20 - 27 21 - 29 22 - 31 23 - 33 24 - 35 THROW THROW 15 SIZE 6 X 18 SIZE 50 300 SCFM SCFM X 50 250 9-14 18-24 - 94 122 6 50 225 SIZE NECK PATTERN CFM AREA SIZE www.dasco.com.kw B 6 X 21 Note SIZE : Is the nominal neck size in inches. NICK AREA : Is in square feet. PATTERN : Is flow pattern as detailed previously. P(s) : Supply pressure drop in inches W.G. SCFM : Side CFM. THROW : IN feet corresponding to 100 & 50 FPM terminal velocity. SNC : Room NC for supply based on 8 db room effect. 13 Performance Data BASIC PERFORMANCE DATA (Supply Air Ceiling Diffusers) SQUARE & RECTANGULAR NECK B A A NECK VELOCITY $P(s) B SIZE NECK PATTERN CFM S.NC AREA DD-64L 6 DD-63L X DD-62L 24 DD-61L SCFM A B A B A B A B A B A B A B 250 300 400 500 600 700 800 0.018 0.026 0.046 0.072 0.104 0.142 0.186 251 300 400 501 600 700 800 18 22 29 35 39 43 48 131 125 175 37 263 44 306 50 350 4-7 14-19 5-8 15-21 5-9 17-23 6-11 19-24 7-12 20-26 8-13 21-27 9-14 22-29 SCFM 16 118 19 141 25 188 31 235 37 282 44 328 50 375 SCFM - 126 - 150 - 200 - 250 - 300 - 350 - 400 15 - 20 16 - 22 18 - 25 20 -25 22 - 28 22 - 29 24 - 30 - 251 - 300 - 400 - 501 - 600 - 700 - 800 19 - 24 20 - 25 22 - 28 24 - 29 25 - 32 27 - 34 29 - 38 THROW THROW SCFM THROW 16 110 19 31 220 SIZE NECK PATTERN CFM 188 225 300 375 450 526 600 S.NC <18 19 25 30 34 39 45 SCFM 35 59 42 71 6-12 9-14 7-13 11-16 AREA DD-64L 9 DD-63L X DD-62L 12 DD-61L THROW SCFM SCFM 9 X 15 DD-64L DD-63L DD-62L DD-61L 77 70 118 85 140 98 165 9-14 13-18 11-16 14-19 12-17 15-20 13-18 16-21 14-19 17-22 42 92 56 122 70 153 85 183 98 214 113 244 - 113 - 150 - 188 - 225 - 263 - 300 THROW 13-18 14-19 16-21 17 - 22 18 - 23 19 - 24 19 - 26 SCFM - 188 - 225 - 300 - 375 - 450 - 526 - 600 17 - 22 18 - 23 19 - 26 20 - 27 21 - 29 22 - 31 23 - 33 234 281 375 468 562 656 756 THROW S.NC <18 SCFM 35 82 42 99 THROW 20 25 56 132 31 70 35 164 85 196 39 98 230 24 SIZE 9 X 12 SIZE 43 6-12 12-17 7-13 13-18 35 100 42 120 56 160 70 199 85 239 96 279 113 322 SCFM - 117 - 141 - 188 - 234 - 281 - 328 - 378 THROW 14- 19 15 - 20 17 - 22 18 - 23 19 - 24 19 - 26 20 - 27 -234 - 281 - 375 - 468 - 562 - 656 - 756 18 - 23 19 - 24 20 -27 21 - 29 22 - 32 23 - 34 24 - 36 THROW X 113 265 SCFM SCFM 6 113 187 - 94 SIZE NECK PATTERN CFM AREA 35 56 94 SIZE 9-14 15-20 11-16 16-21 12-17 17-22 13-18 18-23 14-19 19-24 9 X 15 Note SIZE : Is the nominal neck size in inches. NICK AREA : Is in square feet. PATTERN : Is flow pattern as detailed previously. 14 Performance Data P(s) : Supply pressure drop in inches W.G. SCFM : Side CFM. THROW : IN feet corresponding to 100 & 50 FPM terminal velocity. SNC : Room NC for supply based on 8 db room effect. BASIC PERFORMANCE DATA (Supply Air Ceiling Diffusers) SQUARE & RECTANGULAR NECK A A NECK VELOCITY $P(s) B SIZE NECK PATTERN CFM S.NC AREA DD-64L 9 X 1.125 DD-63L DD-62L 18 DD-61L SCFM THROW SCFM THROW SCFM THROW SCFM THROW SIZE NECK PATTERN CFM AREA DD-64L 9 X 1.31 DD-63L DD-62L 21 DD-61L S.NC SCFM THROW SCFM THROW SCFM THROW SCFM THROW SIZE NECK PATTERN CFM DD-64L X 24 1.5 DD-63L DD-62L DD-61L SCFM THROW SCFM THROW SCFM THROW SCFM THROW B A B A B A B A B A B A B 250 300 400 500 600 700 800 0.018 0.026 0.046 0.072 0.104 0.142 0.186 281 337 450 562 674 788 900 <18 35 22 106 6-12 13-18 35 123 6-12 14-19 42 28 127 7-13 14-19 42 56 169 33 36 42 47 70 211 85 252 98 296 113 337 9-14 16-21 11-16 17-22 12-17 18-23 13-18 19-25 14-19 19-26 148 56 197 7-13 15-20 70 246 85 295 96 345 9-14 17-22 11-16 18-23 12-17 19-25 13-18 19-26 14-19 20-27 - 164 - 225 - 281 - 337 - 394 - 450 15 - 20 16 - 21 17 - 23 19 - 25 19 - 26 20 -27 21 - 29 - 281 - 337 - 450 - 562 - 674 - 788 - 900 19 - 25 19 - 26 21 - 29 22 - 32 23 - 34 24 - 37 25 - 39 328 394 525 656 788 918 1050 28 33 70 258 38 85 309 41 98 361 45 113 412 18 35 129 22 42 155 6-12 14-19 7-13 15-20 35 147 42 176 6-12 15-20 7-13 16-21 - 164 - 197 - 263 - 328 - 394 - 459 16 - 21 17 - 22 18 - 24 19 -26 20 - 27 21 - 29 21 - 30 - 328 - 394 - 525 - 656 - 788 - 918 - 1050 19 - 26 20 -27 21 - 30 22 - 33 24 - 37 25 - 39 25 - 40 375 450 600 750 900 1050 1200 18 23 30 35 41 45 50 35 153 6-12 15-20 35 170 42 56 9-14 17-22 11-16 18-23 12- 17 19-25 13-18 20-26 14-19 20-27 56 235 70 293 85 352 98 410 56 244 70 305 85 365 98 427 - 525 56 272 70 340 85 408 98 476 18 SIZE 9 X 21 SIZE 9 113 544 6-12 16-21 7-13 17-22 - 188 - 225 9-14 19-24 11-16 20-25 12-17 21-27 13-18 22-28 15-20 22-29 - 300 - 375 - 450 17 - 22 18 - 23 20 - 25 21 - 26 22 - 28 23 - 29 24 - 30 - 375 - 450 - 600 - 750 - 900 - 1050 - 1200 20 - 27 22 - 28 24 - 31 25 - 33 27 - 36 28 - 38 30 - 40 - 525 X 113 487 9-14 18-23 11-16 19-24 12-17 20-26 13-18 21-27 15-20 21-28 42 204 9 113 469 9-14 18-23 11-16 19-25 12-17 19-26 13-18 20-27 14-19 21-29 183 7-13 16-21 207 SIZE 113 384 - 141 S.NC AREA 9 A www.dasco.com.kw B - 600 X 24 Note SIZE : Is the nominal neck size in inches. NICK AREA : Is in square feet. PATTERN : Is flow pattern as detailed previously. P(s) : Supply pressure drop in inches W.G. SCFM : Side CFM. THROW : IN feet corresponding to 100 & 50 FPM terminal velocity. SNC : Room NC for supply based on 8 db room effect. 15 Performance Data BASIC PERFORMANCE DATA (Supply Air Ceiling Diffusers) SQUARE & RECTANGULAR NECK B A A NECK VELOCITY $P(s) B A B A B A B A B A B A B A B 250 300 400 500 600 700 800 0.018 0.026 0.046 0.072 0.104 0.142 0.186 SIZE NECK PATTERN CFM 312 375 500 624 750 876 1000 S.NC <18 21 28 33 36 40 45 56 194 70 242 85 290 98 340 AREA DD-64L 12 X 1.25 DD-63L DD-62L 15 DD-61L SCFM THROW SCFM THROW SCFM THROW SCFM THROW 35 121 42 146 6-12 14-19 7-13 15-20 35 139 42 167 113 387 6-12 15-20 7-13 16-21 - 156 - 188 - 250 - 312 - 375 - 438 16 - 21 17 - 22 18 - 13 19 - 24 20 - 26 21- 28 21- 30 - 312 - 375 - 500 - 624 - 750 - 876 - 1000 19 - 24 20 - 26 21 - 30 22 - 32 23 - 35 25 - 38 25 - 40 9-14 17-22 11-16 18-23 12-17 19-24 13-18 19-26 14-19 20-27 56 222 70 277 85 333 96 396 9-14 17-23 11-16 18-25 12-17 19-26 13-18 20-27 14-19 21-29 - 500 375 450 600 750 900 1050 1200 S.NC <18 23 29 33 38 43 48 56 244 70 305 85 365 DD-64L 12 1.5 X DD-63L DD-62L 18 DD-61L SCFM THROW SCFM THROW SCFM THROW SCFM THROW SIZE NECK PATTERN CFM S.NC AREA DD-64L 12 X 1.75 21 DD-63L DD-62L DD-61L SCFM THROW SCFM THROW 35 153 42 183 6-12 15-20 7-13 17-22 35 170 42 204 6-12 16-21 7-13 17-22 - 188 - 225 - 300 - 375 - 450 - 525 - 600 17 - 22 17 - 23 18 - 24 20 - 26 21 - 29 22- 30 22 - 33 - 375 - 450 - 600 - 750 - 900 - 1050 - 1200 20 - 26 21 - 29 22 - 33 23 - 35 25 - 38 26 - 40 27 - 42 438 525 700 875 1050 1224 1400 20 24 30 34 39 45 49 35 148 42 221 6-12 17-22 7-13 17-23 35 202 42 242 98 427 70 340 85 408 98 476 70 368 85 440 98 514 113 70 403 85 483 98 563 6-12 17-22 7-13 18-23 - 219 - 263 - 350 - 438 THROW 17-23 18-24 19-26 21-28 22-30 22-31 23-33 SCFM - 438 - 525 - 700 - 875 - 1050 - 1224 - 1400 21 - 28 22 - 30 23 - 33 24 - 36 26 - 40 27 - 42 28 - 44 THROW 9-14 19-24 11-16 20-26 12-17 21-29 13-18 22-31 14-19 23-33 - 612 12 X 18 SIZE 12 113 644 SCFM - 525 SIZE 587 9-14 18-24 11-16 20-26 12-17 21-29 13-18 22-30 14-19 22-32 56 322 15 113 544 9-14 18-24 11-16 19-26 12-17 20-27 13-18 21-29 14-19 22-31 56 294 X 113 487 9-14 18-23 11-16 19-24 12-17 20-26 13-18 21-29 14-19 21-30 56 272 12 113 444 SIZE NECK PATTERN CFM AREA SIZE - 700 X 21 Note SIZE : Is the nominal neck size in inches. NICK AREA : Is in square feet. PATTERN : Is flow pattern as detailed previously. 16 Performance Data P(s) : Supply pressure drop in inches W.G. SCFM : Side CFM. THROW : IN feet corresponding to 100 & 50 FPM terminal velocity. : Room NC for supply based on 8 db SNC room effect. BASIC PERFORMANCE DATA (Supply Air Ceiling Diffusers) SQUARE & RECTANGULAR NECK A A NECK VELOCITY $P(s) B SIZE NECK PATTERN CFM S.NC AREA DD-64L 12 X 2.0 DD-63L DD-62L 24 DD-61L SCFM THROW SCFM THROW SCFM THROW DD-64L 15 X 1.875 DD-63L DD-62L 18 DD-61L 15 X 2.185 21 DD-63L DD-62L DD-61L B A B A B A B A B A B 250 300 400 500 600 700 800 0.018 0.026 0.046 0.072 0.104 0.142 0.186 500 600 800 1000 1200 1400 1600 22 26 32 37 40 45 50 100 300 125 375 150 450 175 525 200 600 63 187 75 225 6-12 18-23 7-13 18-24 63 219 75 263 6-12 18-23 7-13 19-24 - 250 - 300 - 400 - 500 - 600 - 700 - 800 9-14 19-25 11-16 20-27 12-17 22-30 13-18 23-31 14-19 24-33 100 350 125 438 150 525 175 613 9-14 20-25 11-16 21-28 12-17 22-30 13-18 24-32 14-19 25-34 19 - 25 20 - 26 22 - 30 23 - 33 25 - 35 26 - 39 - 600 - 800 - 1000 - 1200 - 1400 - 1600 THROW 21 - 31 22 - 33 24 - 34 27 - 39 28 - 42 30 - 44 32 - 47 469 562 750 938 1125 1312 1500 S.NC 18 23 29 34 SCFM 98 137 118 163 156 219 196 273 THROW SCFM THROW SCFM THROW SCFM THROW SCFM THROW 39 43 235 328 274 382 118 222 156 297 196 371 235 445 274 519 24 SIZE 15 312 594 - 235 - 281 - 375 - 469 20 - 26 21 - 27 22 - 30 23 - 34 24 - 36 25 - 38 26 - 40 - 469 - 562 - 750 - 938 - 1125 - 1312 - 1500 23 - 34 24 - 36 26 - 40 28 - 44 30 -47 31 - 49 32 - 51 548 655 875 1095 1312 1529 1750 19 23 29 35 40 44 48 118 210 156 282 196 352 235 421 274 491 98 176 - 656 X 47 14-18 19-24 16-19 19-25 18-22 20-27 19-24 22-30 20-26 23-33 21-27 24-35 22-29 25-37 - 563 12 312 438 14-18 17-21 16-19 18-22 18-22 19-25 19-24 21-27 20-26 22-29 21-27 23-31 22-29 24-34 98 186 SIZE 200 700 - 500 S.NC DD-64L A 18 - 24 SIZE NECK PATTERN CFM AREA B SCFM SIZE NECK PATTERN CFM AREA A - 750 X 18 SIZE 312 563 SCFM 14-18 17-22 16-19 18-23 18-22 19-25 19-25 21-28 20-26 23-30 21-27 24-32 22-29 25-35 15 98 225 118 269 156 360 196 450 235 539 274 628 312 719 THROW 14-18 18-23 16-19 19-24 18-22 20-26 19-25 22-29 20-26 24-31 21-27 25-33 22-29 26-37 SCFM THROW SCFM THROW www.dasco.com.kw B - 274 - 328 - 438 - 548 - 656 - 765 - 875 19 - 24 20 - 25 21 - 28 23 - 32 25 - 34 26 - 38 28 - 41 - 548 - 655 - 875 - 1095 - 1312 - 1529 - 1750 23 - 32 25 - 35 27 - 39 30 - 44 33 - 47 35 - 51 37 - 56 X 21 Note SIZE : Is the nominal neck size in inches. NICK AREA : Is in square feet. PATTERN : Is flow pattern as detailed previously. P(s) : Supply pressure drop in inches W.G. SCFM : Side CFM. THROW : IN feet corresponding to 100 & 50 FPM terminal velocity. SNC : Room NC for supply based on 8 db room effect. 17 Performance Data BASIC PERFORMANCE DATA (Supply Air Ceiling Diffusers) SQUARE & RECTANGULAR NECK B A A NECK AREA DD-64L 15 X 2.5 DD-63L DD-62L 24 DD-61L SIZE NECK PATTERN AREA DD-64L 18 X 2.625 DD-63L DD-62L 21 DD-61L SIZE NECK PATTERN AREA DD-64L 18 X 3.0 24 DD-63L DD-62L DD-61L A B A B A B A B A B A B 300 400 500 600 700 800 0.018 0.026 0.046 0.072 0.104 0.142 0.186 CFM 628 748 1000 1252 1499 1746 2000 S.NC 21 24 30 36 41 45 50 118 256 156 344 196 430 235 515 274 599 $P(s) SIZE NECK PATTERN B 250 VELOCITY B A SCFM THROW SCFM THROW SCFM 98 216 312 688 14-18 17-23 16-19 19-24 18-22 20-26 19-25 22-29 20-26 24-32 21-27 25-34 22-29 26-36 98 256 118 315 156 422 196 528 235 632 274 736 - 314 - 374 - 500 - 626 - 750 19 - 25 20 - 26 21 - 28 23 - 33 25 - 35 26 - 37 28 - 41 - 628 - 748 -1000 - 1252 - 1499 - 1746 - 2000 21 - 33 25 - 36 27 - 40 29 - 45 32 - 48 36 - 53 39 - 59 CFM 655 788 1050 1313 1575 1838 2138 S.NC 18 24 30 36 41 45 50 186 226 225 300 281 376 337 451 394 525 450 619 THROW SCFM THROW SCFM THROW SCFM THROW 141 187 8-15 11-18 -1000 9-16 13-20 10-17 15-22 12-18 17-24 14-20-19-27 15-21 21-29 17-23 24-33 141 257 168 310 225 413 281 516 337 619 394 722 8-15 12-19 9-16 14-21 - 328 - 394 THROW 13-20 15-22 17-24 19-28 22-33 24-37 27-40 SCFM - 655 - 788 - 1050 - 1313 - 1575 - 1838 - 2138 16 - 25 18 - 28 20 - 31 23 - 34 26 - 38 28 - 41 31 - 46 CFM 748 901 1200 1500 1800 2100 2400 S.NC 20 25 31 37 42 46 51 225 375 281 469 337 563 394 656 450 750 THROW SCFM 10-17 16-23 12-18 18-25 14-20 21-29 15-21 22-30 17-23 25-35 - 657 - 788 - 919 - 1069 141 233 168 283 8-15 11-19 9-16 14-21 141 304 168 367 8-15 11-20 9-16 14-22 SCFM - 374 - 451 THROW 12-21 15-23 17-25 19-28 22-34 24-37 SCFM - 748 - 901 - 1200 - 1500 - 1800 - 2100 - 2400 15 - 25 18 - 27 20 - 29 23 - 33 26 - 39 29 - 43 34 - 49 THROW SCFM THROW THROW 10-17 16-23 12-18 18-25 14-20 20-28 16-22 22-30 18-25 26-34 225 488 281 610 337 732 394 853 - 750 - 900 - 1050 24 SIZE 18 X 21 SIZE 18 450 975 10-17 16-24 12-18 18-26 14-20 21-29 16-22 22-31 18-25 27-35 - 600 X 450 844 SCFM - 525 15 312 844 14-18 18-24 16-19 19-25 18-22 20-27 19-25 22-30 20-26 25-33 21-27 26-35 22-29 27-38 - 873 SIZE - 1200 29-42 X 24 Note SIZE : Is the nominal neck size in inches. NICK AREA : Is in square feet. PATTERN : Is flow pattern as detailed previously. 18 Performance Data P(s) : Supply pressure drop in inches W.G. SCFM : Side CFM. THROW : IN feet corresponding to 100 & 50 FPM terminal velocity. : Room NC for supply based on 8 db SNC room effect. BASIC PERFORMANCE DATA (Supply Air Ceiling Diffusers) SQUARE & RECTANGULAR NECK A A NECK VELOCITY $P(s) B SIZE NECK PATTERN CFM S.NC AREA DD-64L 21 X 3.5 24 DD-63L DD-62L DD-61L SCFM THROW SCFM THROW SCFM THROW SCFM THROW A B A B A B A B A B A B A B 250 300 400 500 600 700 800 0.018 0.026 0.046 0.072 0.104 0.142 0.186 871 1053 1400 1748 2100 2452 2800 21 25 30 35 40 46 51 230 - 297 306 -394 383 - 491 460 - 590 536 - 690 191 - 245 613 - 787 12-16 17-21 14-17 19-24 15-19 21-25 16-20 24-29 18-22 27-32 19-24 29-35 20-25 31-37 191 340 230 412 306 547 383 683 460 820 536 958 - 1226 21 613 1094 12-16 18-22 14-17 20-25 15-19 22-27 16-20 25-31 18-22 28-33 19-24 30-37 20-25 33-40 - 1050 SIZE - 436 - 527 - 700 - 874 - 1400 19 - 23 22 - 26 23 - 29 27 - 33 29 - 35 31 - 38 34 - 42 - 871 - 1053 - 1400 - 1748 - 2100 - 2452 - 2800 22 - 26 25 - 30 27 - 34 31 - 38 33 - 42 35 - 45 38 - 51 www.dasco.com.kw B X 24 Note SIZE : Is the nominal neck size in inches. NICK AREA : Is in square feet. PATTERN : Is flow pattern as detailed previously. : Supply pressure drop in inches W.G. P(s) : Side CFM. SCFM THROW : IN feet corresponding to 100 & 50 FPM terminal velocity. : Room NC for supply based on 8 db SNC room effect. Ceiling Diffusers (Special Decorative Frame) 19 Performance Data BASIC PERFORMANCE DATA (Return Air Ceiling Diffusers) SIZE NECK AREA 6X6 0.25 9x9 0.56 12 X 12 1.0 15 X 15 1.56 8 X 18 2.25 21 x 21 3.06 24 X 24 4.0 6x9 0.375 6 x 12 0.5 6 x 15 0.625 6 x 18 0.75 6 x 21 0.875 6 x 24 1.0 9 x 12 0.75 9 x 15 0.938 9 x 18 1.125 NECK VELOCITY ∆P( R ) CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC 20 Performance Data 250 0.021 63 <18 140 18 250 <18 390 22 562 20 765 26 1000 24 94 <18 125 <18 156 <18 188 <18 219 20 251 20 188 <18 234 <18 281 18 300 0.031 75 18 169 20 300 23 469 25 675 28 919 29 1200 29 113 <18 150 20 188 21 225 22 262 24 300 24 225 21 281 22 337 24 400 0.055 100 20 225 24 400 29 625 31 900 34 1225 34 1600 34 150 21 200 24 250 27 300 28 350 30 400 31 300 27 375 27 450 30 500 0.086 125 24 281 29 500 34 781 36 1125 39 1530 40 2000 41 188 25 250 29 312 32 375 33 438 35 501 37 375 32 468 33 562 35 600 0.125 150 28 338 33 600 38 938 40 1350 44 1838 46 2400 47 226 29 300 33 376 36 450 37 524 39 600 41 450 36 562 37 674 38 700 0.170 175 33 394 39 700 43 1095 47 1575 49 2144 54 2800 54 262 34 350 39 438 41 526 42 612 44 700 45 526 41 656 42 788 44 800 0.220 200 37 450 42 800 47 1250 52 1800 55 2450 60 3200 59 300 38 400 44 500 46 600 48 700 49 800 50 600 47 756 45 900 49 SIZE NECK AREA 9 X 21 1.31 9 x 24 1.5 12 x15 1.25 12 x 18 1.5 12 x 21 1.75 12 x 24 2.0 15 x 18 1.875 15 x 21 2.185 15 x 24 2.5 18 x 21 2.625 18 x 24 3.0 21 x 24 3.5 NECK VELOCITY $P( R ) CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC CFM R.NC 250 0.021 328 21 375 21 312 20 375 22 438 23 500 25 469 21 548 22 628 24 655 21 748 23 871 24 300 0.031 394 25 450 26 375 24 450 26 525 27 600 29 562 26 655 26 748 28 788 27 901 28 1053 28 400 0.055 525 31 600 33 500 31 600 32 700 33 800 35 750 32 875 32 1000 33 1050 33 1200 34 1400 33 500 0.086 656 36 750 38 624 36 750 36 875 36 1000 40 938 37 1095 38 1252 39 1313 39 1500 40 1748 38 600 0.125 788 41 900 44 750 39 900 41 1050 42 1200 43 1125 42 1312 43 1499 44 1575 44 1800 45 2100 43 700 0.170 918 44 1050 48 876 43 1050 46 1224 48 1400 48 1312 46 1529 47 1746 48 1838 48 2100 49 2452 49 800 0.220 1050 48 1200 53 1000 48 1200 51 1400 52 1600 53 1500 50 1750 51 2000 53 2138 54 2400 55 2800 54 www.dasco.com.kw BASIC PERFORMANCE DATA (Return Air Ceiling Diffusers) Note SIZE : Is the nominal neck size in inches. NICK AREA : Is in square feet. P(s) RNC : Return pressure drop in inches W.G. : Room NC for return based on 8 db room effect. For Square / Rectangular core styles with 1,2,3 or 4way airflow patterns 21 Performance Data BALANCING PROCEDURE To determine the CFM, follow up the following procedure: 1. Use measuring tools for air velocity like ALNOR 2220-A lip or 2200 probe, or Anemotherm air meter. 2. Take number of measuring points (should be not less than 4) with the probe so located and adjusted as to measure the maximum air velocity to the air flow direction on the face of the diffuser as shown. 3. Calculate the average measure velocity by using : V ( average ) = ( V1+ V2+. . . . . . + Vk ) k 4. Determine the area factor Ak from table (6) considering the proper size . 5. Calculate CFM : CFM = AkX Vk DIMENSIONAL DATA CEILING DIFFUSERS DD-6 *NOTE : H = 2 7/16” H=3 13/ 16” (62mm) WITHOUT DAMPER (97mm) WITH DAMPER 22 Balancing Procedure PERFORATED CEILING DIFFUSERS GENERAL DESCRIPTION www.dasco.com.kw DASCO perforated ceiling diffusers DDP-6 are designed especially for installation where a smooth air flow as well as a symmetrical air diffusion is required to meet with a certain HVAC application, and yet with a pleasing apppearance to suit architectural requirements to flush outlets and concealed fixing method. Perforated Ceiling Diffuser (DDP - 64S) DASCO perforated ceiling diffuser DDP- 6 is a multi-vane type with a fully and easily removable perforated face with 4 mm diameter holes, 6 mm pitches and 40% of its face open, with square or round neck and can be supplied in 1,2,3&4 way airflow patterns for all air distribution requirements. The diffuser can also be supplied with an opposed blade damper section ( for supply diffusers only ) which in turns is fixed to the outer frame of the diffuser and is lever operated from the face of the diffuser. Key operated opposed blades damper can also be supplied upon request. The damper frame is separated from its blades by using nylon bushings to eliminate corrosion and vibration. DDP-6 perforated ceiling diffuser is available in square and rectangular patterns for supply –air as well as for return-air and which in turn is supplied without opposed blade damper as standard. MATERIAL AND FINISH High quality extruded aluminium in sliver anodized matt finish. Perforated face is of aluminium sheet 1.5 mm thickness. White polyester powder coating finish or any other RAL standard colour are also available upon your requirement 23 Perforated Diffusers ORDERING CODE Supply Air Perforated Ceiling Diffuser DDP - 6 a - b - WxH 1,2,3,or 4 way airflow patterns S:Square type L:Rectangular type C:Corner type WxH = Neck size, inch (mm) NOTE : When specifying a return air diffuser, use the symbol DDPR instead of DDP. LISTED SIZES AVAILABLE (24” X 24” perforated face module ). Table ( 7 ) : Listed sizes available ( W x H ) for Perforated Ceiling Diffusers Perforated Ceiling Diffuser (DDP - 64S) 24 Perforated Diffusers BASIC PERFORMANCE DATA PERFORATED SUPPLY AIR CEILING DIFFUSERS B A NECK A B VELOCITY 250 $P(s) 0.015 B A B 300 0.023 A B 400 0.041 A B 500 0.066 A B 600 0.94 A B 700 0.13 A B 800 0.172 75 100 125 150 175 200 SIZE NECK PATTERN CFM 63 S.NC < 18 20 22 25 29 34 38 AREA DDP-64S THROW 2-4 3-5 4-6 5-7 6-8 7-9 8-10 DDP-63S THROW 2-4 3-5 4-6 5-7 6-7 6-8 7-9 DDP-62S THROW 2-3 2-4 3-5 4-6 5-6 5-7 6-8 DDP-61S THROW 2 2-3 3-4 3-5 4-5 5-6 6-7 SIZE NECK PATTERN CFM 140 169 225 281 338 394 450 S.NC < 18 20 23 26 31 36 42 6 X 0.25 6 AREA 9 X 0.56 9 DDP-64S THROW 3-5 5-7 7-9 8-11 10-12 11-14 13-16 DDP-63S THROW 3-5 4-6 5-8 7-10 9-11 10-12 11-14 DDP-62S THROW 2-4 4-5 5-7 6-9 8-10 9-11 10-12 DDP-61S THROW 2-3 3-5 4-6 5-7 7-9 8-10 9-11 250 300 400 500 600 700 800 S.NC 19 22 25 28 34 39 45 DDP-64S THROW 4-6 6-8 8-11 10-14 12-16 14-19 16-22 DDP-63S THROW 4-6 5-7 7-10 9-13 11-14 12-17 14-19 DDP-62S THROW 3-5 4-6 6-8 8-11 10-13 11-15 12-17 DDP-61S THROW 3-4 4-5 5-7 7-9 8-11 10-14 11-15 SIZE NECK PATTERN CFM AREA 12 X 12 1.0 www.dasco.com.kw A SIZE 6 X 6 SIZE 9 X 9 SIZE 12 X 12 25 Performance Data BASIC PERFORMANCE DATA PERFORATED SUPPLY AIR CEILING DIFFUSERS B A A NECK A B VELOCITY 250 $P(s) 0.015 A B 300 0.023 A B 400 0.041 A B 500 0.066 A B 600 0.94 390 469 625 781 S.NC 20 23 27 DDP-64S THROW 5-7 8-10 DDP-63S THROW 5-6 DDP-62S THROW DDP-61S THROW B SIZE NECK PATTERN CFM AREA 15 X 1.56 15 A B 700 0.13 A B 800 0.172 938 1095 1250 32 38 44 50 10-13 12-16 15-20 18-23 20-26 7-9 9-11 11-14 13-18 16-21 18-23 4-5 6-8 8-10 10-12 11-16 14-18 16-20 3-4 5-7 7-9 9-11 10-14 12-16 14-18 SIZE 15 X 15 PERFORATED RETURN AIR CEILING DIFFUSERS SIZE 6x6 9x9 12 x12 15 x 15 NECK NECK VELOCITY AREA $P( R ) CFM 0.25 R.NC CFM 0.56 R.NC CFM 1.0 R.NC CFM 1.56 R.NC 250 0.019 63 <18 140 19 250 20 390 21 300 0.032 75 20 169 21 300 23 469 24 400 0.059 100 23 225 24 400 26 625 29 500 0.091 125 26 281 27 500 30 781 35 600 0.115 150 30 338 32 600 35 938 40 700 0.148 175 36 394 37 700 40 1095 46 800 SIZE 0.198 200 6x6 39 450 9X9 43 800 12 x12 47 1250 15 x 15 52 Note SIZE : Is the nominal neck size in inches. NICK AREA : Is in square feet. PATTERN : Is flow pattern as detailed previously. P(s) : Supply pressure drop in inches W.G. 26 Performance Data : P(R) THROW : : SNC : RNC Return pressure drop in inches W.G. In feet corresponding to 100 & 50 FPM terminal velocity. Room NC for supply based on 8 db room effect. Room NC for return based on 8 db room effect. ACCESSORIES SQUARE TO ROUND ADAPTER - AD www.dasco.com.kw Listed Sizes Available Square to Round Adapter - AD Table 8. Listed sizes available of Square to Round Adapters • • • The AD is designed as transition adapter permitting the attachement of round flexible or rigid duct to a square neck diffuser. The AD is recommended as an accessory for the DD-6/DDP-6 series square neck diffuser. Galvanized steel construction . With polyster powder coating finish as optional. 27 Accessories EQUALIZING GRID - EG • EG is made of extruded aluminium construction. The blades are fitted in Nylon bushing to prevent noise. • The EG is designed to assure precision control and distribution of air flow, through stub duct and into the neck of the diffuser, The EG are bracket mounted to ducts. • The blades are easy adjustable at any desired degree individually. Single Element Equalizing Grid - EG Multi Elements Ceiling Diffusers with Round Plastic Cores 28 Accessories Quantity Area Density Imperial Unit Metric Unit Square meter (m2 ) Square foot 2 From Imperial To From Metric To Metric Multiply By Imperial Multiply By 0.0929 10.764 Square inch Square millimeter (mm ) 645.16 0.00155 Pounds per cubic foot Kilograms per cubic 16.018 0.624 3 meter (kg/m ) Length Pressure inch millimeter (mm) 25.4 0.0394 foot millimeter (mm) 304 .8 0.00328 foot meter (m) 0.3048 3.2808 ya rd meter (m) 0.9144 1.0938 inch of wa ter column K ilopa sca l (kPa ) 0.2486 4.0219 foot of wa ter column K ilopa sca l (kPa ) 2.9837 0.3252 inch of mercury column K ilopa sca l (kPa ) 3.3741 0.2964 ounces per squa re inch K ilopa sca l (kPa ) 0.4309 2.3206 pounds per squa re inch K ilopa sca l (kPa ) 6.8948 0.145 5 / 9 (º F- 3 2 ) (9 / 5 º C ) + 3 2 Temperature fa hrenheit Velocity celcius (º C ) feet per second meters per second (m/s) 0.3048 3.2808 feet per minute ( fpm) meters per second (m/s) 0.00508 196.85 miles per hour meters per second (m/s) 0.44704 2.2369 0.4719 2.119 0.0004719 2119.0 Volume Flow Cubic feet per minute (cfm) Liters per second (L/s) 3 Cubic feet per minute (cfm) Cubic meters per second (m /s) Cubic feet per hour ( cfh) Milliliters per second( ml/s) 7.8658 0.127133 Gallons per minute(U.S.) Liters per second( L/s) 0.6309 15.850 Gallons per minute(imperial) Liters per second( L/s) 0.7577 13.198 www.dasco.com.kw CONVERSION TABLE Table 9. Metric guide conversion factors 29 Conversion Table TESTING AND APPROVAL Different samples from DASCO air terminal devices (Ceiling Diffusers) were tested at ITS (Intertek Testing Services) labs in accordance with: • Air diffusion council test code for Ceiling diffusers No. • ISO 5219 “Air distribution and air diffusion laboratory aerodynamic testing and rating of air terminal devices”. • ANSI/ASHRAE 70-1991, “Method of testing for rating the performance of air outlets and inlets”. CEILING DIFFUSERS WERE TESTED FOR a. b. c. d. Sound (NC Noise Criteria). Static pressure in inches W.G. Throw, feet. Ak (Area factor). 30 Testing & Approval NOW YOU CAN ACHIEVE OPTIMAL COATING PERFORMANCE ON ALL PRODUCTS YOU PAINT! DASCO offers a first class service by introducing a wide range of perfect polyester powder coating on all of its aluminium products of air terminal devices. The best quality of polyester powder Corro-Coat are used in according to the internnational standards (BS,ISO,DIN,ASTM). PE-F architectural grade polyester powders are used perfectly with pre-treatment, electrostatic spray and curing in accordance with the above standards recommendations. A complete range of RAL-Standard colours are always available in addition to a vast range of special compound colours as per our customers request. www.dasco.com.kw COATING WITH POWDER RAL Standard Colour Chart Swatch 31 Now producing relief knots as in natural wood New Technology Excellence 1. 2. 3. Resistance to high radiation and extreme climatic conditions. It can be used in painting elaborate geometrical shapes producing perfect quality and aesthetic results. It is the only technology that can replace wood in traditional areas. New Mahogany - 21 New Mahogany - 22 32 Testing & Approval www.dasco.com.kw 33 www.dasco.com.kw P.O. Box: 6192 Hawalli 32036 Kuwait. Tel: +965 4839911 Fax: +965 4815498 www.dasco.com.kw Product Bulletin 132-D Since 1962
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