ENERGY STAR® Qualified Products

ENERGY STAR®

HIGH EFFICIENCY WATER HEATERS

Think Green, Save Green

ENERGY STAR® Program

Sponsored by the U. S. Environmental Protection Agency and the Department of Energy, the ENERGY STAR® program promotes environmentally conscious products, which often can translate into savings for homeowners. We are pleased to announce that the following A. O. Smith high efficiency water heater models have been recognized* under the ENERGY STAR® program.

*Effective as of September 1, 2010.


Model Number  Series  Gallon Capacity  First Hour Rating Gallons  BTU Input  Energy Factor  Recovery 90˚F Rise Gallons  Height*  Diameter  Vent Diameter 

High Efficiency Models

 
6-Year Tank and Parts Warranty 
GAHH-40  102 40 70 40,000 .70 43 61-3/4 20 3 or 4
GAHH-50  100 50 81 40,000 .70 43 60-5/8 22 3 or 4
Tall Models 
GCF-40  100 40 67 40,000 .67 42 64-1/4 20 3 or 4
GCF-50  100 50 81 40,000 .67 42 63-1/2 22 3 or 4
Short Models 
GCFL-40  100 40 67 40,000 .67 42 54 22 3 or 4

Power Vent Models

 
GPVR-40  100/101 40 70 40,000 .67 44 63 20-1/2 2, 3 or 4
GPVR-50  100/101 50 83 40,000 .67 44 65 22 2, 3 or 4
*Height to top of draft hood
Propane inputs: GPVR-40, GPVR-50: 40,000 BTU

Model Number  Energy Factor  BTU Input Natural Propane  Hot Water Output 
Minimum  Maximum  Maximum  45˚F Rise  70˚F Rise 

Tankless Models

 
Indoor Models 
ATI-305N* .82 15,000 180,000 7.5 6.6 4.3
ATI-505N* .82 15,000 199,000/190,000 9.4 7.4/7.1 4.7
Outdoor Models 
ATO-305N* .82 15,000 180,000 7.5 6.6 4.3
ATO-505N* .82 15,000 199,000 9.4 7.4 4.7
*For propane change "N" to "P" in model number (ATI-505P or ATI-310-P).

Model Number* Type   BTU Input Natural/Propane   Energy Factor (EF)   Hot Water Output (GPM)  
Minimum   Maximum     Maximum   45°F Rise   70°F Rise  

Tankless Models

 
Non-Condensing 
ATI-110-N Indoor 19,500 140,000 0.82 6.6 5.1 3.3
ATI-310-N Indoor 11,000 190,000 0.82 8.0 6.9 4.4
ATI-510-N Indoor 11,000 199,000 0.82 10.0 7.2 4.7
AT0-110-N Outdoor 19,500 140,000 0.82 6.6 5.1 3.3
AT0-310-N Outdoor 11,000 190,000 0.82 8.0 6.9 4.4
AT0-510-N Outdoor 11,000 199,000 0.82 10.0 7.2 4.7
Condensing 
ATI-520H-N Indoor 13,000 199,000 0.91 9.0 8.1 5.2
AT0-520H-N Outdoor 13,000 199,000 0.91 9.0 8.1 5.2


Model Number  Gallon Capacity  Energy Factor By Mode  1st Hour Rating Galon By Mode  Standard Voltage  No. Of Elements  Standard Input (KW) Upper/Lower  Height (Inches)  Diameter (Inches) 
Eff  Hybrid  Elect  Eff  Hybrid  Elect 

Hybrid Electric Models

 
10-Year Tank and Parts Warranty 
PHPT-60  60 2.40 2.33 .88 51 68 66 240 2 4500/2000 67 1/3 24 1/2
PHPT-80  80 2.30 2.33 .85 70 84 76 240 2 4500/2000 81 1/2 24 1/2


Model Number   Heat Exchanger   Solar Energy Factor*   Number of Solar Collectors  

Cirrex® Solar System Packages

 
Deluxe Solar System Packages 
SACI-01-M200501   Single Wall Internal Coil 1.9 - 2.2 1
SACI-02-M200202   Single Wall Internal Coil 2.3 - 3.0 2
SACI-02-M200402   Single Wall Internal Coil 3.3 - 5.3 2
SACI-03-M200203   Single Wall Internal Coil 4.9 - 10.1 3
SACE-01-M100501   Double Wall External Plate 1.7 - 1.8 1
SACE-02-M100202   Double Wall External Plate 2.1 - 2.2 2
SACE-02-M100402   Double Wall External Plate 2.8 - 3.0 2
SACE-03-M100203   Double Wall External Plate 3.5 - 4.3 3
Standard Solar System Packages 
SACI-01-M200501-T41   Single Wall Internal Coil 1.9 - 2.2 1
SACI-02-M200202-T41   Single Wall Internal Coil 2.3 - 3.0 2
SACI-02-M200402-T41   Single Wall Internal Coil 3.3 - 5.3 2
SACI-03-M200203-T41   Single Wall Internal Coil 4.9 - 10.1 3
SACE-01-M100501-T41   Double Wall External Plate 1.7 - 1.8 1
SACE-02-M100202-T41   Double Wall External Plate 2.1 - 2.2 2
SACE-02-M100402-T41   Double Wall External Plate 2.8 - 3.0 2
SACE-03-M100203-T41   Double Wall External Plate 3.5 - 4.3 3

*Cirrex® solar models are eligible for 30% of total installed cost in tax credit, with no maximum limit.