AO Smith 40-gallon Gas Water Heaters Comparison
Compare the AO Smith 40-gallon gas water heaters to find the best model for your home. The comparison charts display the main differences between tank-type heaters, and it includes the technical data and main features. The article compares the first hour rating, recovery rate, energy efficiency and igniter and anode rod type, and energy saving systems...
Comparing AO Smith Technical Data
| Specs. --------- Model |
Input (Btu) x1000 |
First Hour Delivery (GPH) |
Recovery Rate (90F) (GPH) |
Energy Factor |
Approx. Height/ Type (Inch) |
Vent Type |
Warr anty |
| Effex High Efficiency | |||||||
| GAHH-40 | 40 | 70 | 43 | 0.70 | 62 Tall |
A | 6 |
| High Efficiency | |||||||
| GCF-40 | 40 | 67 | 42 | 0.67 | 64 Tall |
A | 6 |
| GCFL-40 | 40 | 67 | 42 | 0.67 | 54 Short |
A | 6 |
| Conservationist | |||||||
| XGV-40 | 40 | 70 | 41 | 0.63 | 62 Tall |
A | 10 |
| ProMax Ultra-Low NOx | |||||||
| GCNH-40 | 40 | 65 | 40 | 0.59 | 62 Tall |
A | 10 |
| GNR-40 | 40 | 70 | 40 | 0.62 | 62 Tall |
A | 10 |
| ProMax High Recovery / High Efficiency | |||||||
| GCVT-40 | 50 | 75 | 51 | 0.59 | 62 Tall |
A | 6, 8, 10 |
| GVR-40 | 40 | 70 | 41 | 0.62 | 62 Tall |
A | 6, 8, 10 |
| GVRL-40 | 40 | 67 | 41 | 0.62 | 51 Short |
A | 6, 8, 10 |
| ProMax | |||||||
| GCV-40 | 40 | 70 | 41 | 0.59 | 62 Tall |
A | 6, 8, 10 |
| GCVL-40 | 40 | 70 | 41 | 0.59 | 51 Short |
A | 6, 8, 10 |
| Energy Saver Manufactured Housing | |||||||
| FMV-40 | 32 35.5 |
52 | 36 | 0.63 | 61 Tall |
A | 6 |
| FMD-40 | 32 | 64 | 33 | 0.59 | 56 Tall |
DV | 6 |
| ProMax Power Direct Vent | |||||||
| GPD-40 | 40 | 70 | 41 | 0.60 | 57 Tall |
PDV | 6, 10 |
| ProMax Power Vent | |||||||
| GPVL-40 | 40 | 73 | 44.7 | 0.70 | 59 Tall |
PV | 6, 10 |
| GPVT-40 | 50 | 90 | 55.9 | 0.70 | 68 Tall |
PV | 6, 10 |
| ProMax Power Vent Ultra Low NOx | |||||||
| GPNH-40 | 42 | 69 | 42.6 | 0.68 | 59 Tall |
PV | 6 |
| ProMax Direct Vent | |||||||
| GDV-40 | 38 | 73 | 41 | 0.60 | 68 Tall |
DV | 6 |
| ProMax Direct Vent Ultra Low | |||||||
| GDNL-40 | 36 | 59 | 39 | 0.59 | 65 Tall |
DV | 6 |
| ProMax SideLoop | |||||||
| GCVH-40L | 40 | 70 | 41 | 0.59 | 62 Tall |
A | 6 |
| GCVT-40L | 50 | 75 | 51 | 0.60 | 62 Tall |
A | 6 |
| GDV-40L | 38 | 73 | 41 | 0.60 | 68 Tall |
DV | 6 |
| GPD-40L | 40 | 70 | 41 | 0.60 | 57 Tall |
PDV | 6 |
Vent type:
A-Atmospheric, PV-Power Vent, DV-Direct Vent, PDV- Power Direct Vent
Gas type:N - Natural gas, P - Propane
Models with the energy factor, EF, of 0.67 and over are Energy Star.
Features Comparison
| Specs. --------- Model |
Anode Rod |
Advanced Diagnostic |
Guardian System |
DynaClean Self- Cleaning |
Low NOx Design |
Igniter |
| Effex High Efficiency | ||||||
| GAHH-40 | 1 | No | No | No | Yes | Electr. |
| High Efficiency | ||||||
| GCF-40 | 1 | Yes | No | Yes | Yes | Electr. |
| GCFL-40 | 1 | Yes | No | Yes | Yes | Electr. |
| Conservationist | ||||||
| XGV-40 | 1 (Mg) | Yes | No | Yes | Yes | Piezo |
| ProMax Ultra-Low NOx | ||||||
| GCNH-40 | 1 (Al) | Yes | No | Yes | Yes | Piezo |
| GNR-40 | 1 (Al) | Yes | No | Yes | Yes | Piezo |
| ProMax High Recovery | ||||||
| GCVT-40 | 1 | No | No | Yes | Yes | Piezo |
| ProMax High Efficiency | ||||||
| GVR-40 | 1 (Al) | No | No | Yes | Yes | Piezo |
| GVRL-40 | 1 (Al) | No | No | Yes | Yes | Piezo |
| ProMax | ||||||
| GCV-40 | 1 (Al) | Yes | No | Yes | Yes | Piezo |
| GCVL-40 | 1 (Al) | Yes | No | Yes | Yes | Piezo |
| Energy Saver Manufactured Housing | ||||||
| FMV-40 | 1 (Al) | No | No | No | Yes | Electr. |
| FMD-40 | 1 (Al) | No | No | No | Yes | Electr. |
| ProMax Power Direct Vent | ||||||
| GPD-40 | 1 (Al, Mg) |
Yes | No | No | Yes | Hot Surface |
| ProMax Power Vent | ||||||
| GPVL-40 | 1 (Al, Mg) |
Yes | No | No | Yes | Hot Surface |
| GPVT-40 | 1 (Al, Mg) |
Yes | No | No | Yes | Hot Surface |
| ProMax Power Vent Ultra Low NOx | ||||||
| GPNH-40 | 1 | Yes | No | Yes | Yes | Piezo |
| ProMax Direct Vent | ||||||
| GDV-40 | 1 (Mg) | No | No | No | Yes | Piezo |
| ProMax Direct Vent Ultra Low | ||||||
| GDNL-40 | 1 (Mg) | No | No | No | Ultra | Piezo |
| ProMax SideLoop | ||||||
| GCVH-40L | 2 | No | No | Yes | Yes | Piezo |
| GCVT-40L | 2 | No | No | Yes | Yes | Piezo |
| GDV-40L | 1 (Mg) | Yes | No | No | Yes | Piezo |
| GPD-40L | 2 | Yes | No | No | Yes | Hot Surface |
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