More Options.
Including The Right
One For You.
Today, A. O. Smith offers the most
complete line of residential and
commercial water heaters featuring
innovative gas, electric, solar and
hybrid technologies. As the industry
leader, we continually develop new
solutions to give you the options you
need to satisfy your hot water demands.
AOSRG01005 Revised June 2014 ©2014 A. O. Smith Corporation
Printed in U.S.A.
A. O. Smith reserves the right to make product changes or
improvements at any time without notice.
500 Tennessee Waltz Parkway
Ashland City, TN 37015
www.hotwater.com
Product Selection Guide
ProMax®
40-Gallon
GCV-40
ProMax®
50-Gallon
GCV-50
ProMax® Plus
High Recovery
75-Gallon
FCG-75
High
Efficiency .67
50-Gallon
GCF-50
50-Gallon
GAHH-50
G A S
Family Size
Benefits
Small - Average
• Lowest
Up-Front Cost
• Easy to Replace
Average
• Low
Up-Front Cost
• Easy to Replace
Average - Large
• High Storage
Capacity
• Easy to Replace
Promax®
Power Vent
Effex®
50-Gallon
GPVT-50
W A T E R
Average
Average
• E nergy Efficiency
and Value
• ENERGY STAR®
Qualified
• Full-Featured
Energy Efficiency
• ENERGY STAR®
Qualified
NonCondensing
Tankless
Vertex™
Power-Vent
Condensing
Tankless
76,000 BTU
GPHE-50
ATI-510
ATI-520
Vertex™ Power
Direct-Vent
100,000 BTU
GDHE-50
ProMax®
50-Gallon
ECT-52
H E A T E R S
Average
• Installation
Flexibility
• ENERGY STAR®
Qualified
Conservationist®
50-Gallon
PXHT-52
E L E C T R I C
Average - Large
• Continuous
Hot Water
• ENERGY STAR®
Qualified
Average - Large
• Better Hot Water
Performance
• ENERGY STAR®
Qualified
Average - Large
• Continuous
Hot Water
• ENERGY STAR®
Qualified
Average - Large
• Full-Featured
• High Performance
• ENERGY STAR®
Qualified
Small - Average
• Lowest
Up-Front Cost
• Easy to Replace
Average
• Energy Efficiency
and Value
• Easy to Replace
ProMax®
80-Gallon
ECT-80
W A T E R
Average - Large
• High Storage
Capacity
• Easy to Replace
Voltex®
Heat Pump
50-Gallon
SHPT-50
Voltex® Hybrid
Heat Pump
80-Gallon
PHPT-80
H E A T E R S
Small-Average
• UP to 2.75
Energy Factor
• ENERGY STAR®
Qualified
Cirrex®
Solar Package7
SAC
S O L A R
Average - Large
• High Performance
• ENERGY STAR®
Qualified
Average - Large
• Over half the energy
heating the water is
derived from the sun
• Entire Pkg is ENERGY
STAR® Qualified
Annual Cost of
Operation1
$277
$282
$306
$244
$233
$251
$199
$209
$172
$199
$579
$555
$613
$192
$226
$138
Annual Savings2
11%
9%
1%
21%
25%
25%
35%
33%
42%
36%
11%
15%
6%
65%
65%
73%
Energy-Efficiency
Ranking
★
★
★
★★
★★★
★★★★
★★★★
★★★★
★★★★★
★★★★★
★
★★
★
★★★★★
★★★★★
★★★★★
Standard Tub3
Recommendation
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
Garden Tub4
Recommendation
3
3
8
3
8
3
3
Maximum
Shower Length5
21 minutes
26 minutes
88 minutes
27 minutes
27 minutes
28 minutes
Endless
103 minutes
Endless
Endless
19 minutes
19 minutes
30 minutes
24 minutes
33 minutes
59 minutes
Simultaneous
Showers6
2
2
3
2
2
2
2
2
2
3
2
2
3
2
3
5
Installation
Space Required
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Your Cost
Installed
Available
Rebates/Discounts
1 Calculated Using USDOE Website Calculator: 64 USG daily @ $1.09 per therm (natural gas) or $0.12/kWh.
6 All showers are assumed to be 8 minutes long with a shower head flow rate of 2.5 GPM
2 Compared to the same power source vs 10-year-old 40-gal. gas or 52-gal. elec.
3 Standard Tub-30 gallons, 20 gallons of hot water
7 Solar thermal package based on installation with 2-panel 120-gal. tank system appropriately sized and installed correctly for the location
4 Garden Tub-75 gallons, 50 gallons of hot water
5 Assuming a shower head flow rate of 2.5 GPM
8 Tankless will fill with reduced flow rates
All performance indicators calculated using a water heater set point of 120 degrees F, an inlet water temperature of 40 degrees F, and a shower/tub temperature of 105 degrees F. For specific tub capacity and fill rates consult online sizing guide or your plumbing professional.
Some models run at higher input ranges and may require larger gas lines and specialized venting and installation considerations.