| Features |
A. O. Smith
Vertex® |
A. O. Smith
ProMax® |
A. O. Smith
Conservationist® |
A. O. Smith
On-Demand Tankless |
| Type |
Gas |
Gas |
Electric |
Gas |
| Energy Efficiency |
High efficiency |
Standard Efficiency |
High Efficiency |
Ultra High Efficiency |
| Tank Capacity |
50 gal. |
50 gal. |
40-80- gal. |
Up to 9.8
gal. per minute |
| Vent - Type |
Direct Vent |
Standard Vent |
None |
Direct Vent |
Factory Warranty
Tank |
6 years |
6 years |
10 years |
12 year on heat exchanger |
Factory Warranty
Parts |
6 years |
6 years |
10 years |
5 years |
|
