Tankless Water Heater Manufactures
Below is a list of the manufacturers which currently sell tankless water heaters in the United States for residential applications
| Manufacturer | Heat Exchange Warranty | General Warranty | Electric | Natural Gas | Propane | Indoor | Outdoor |
|---|---|---|---|---|---|---|---|
| A.O. Smith | 15 | 5 | No | Yes | Yes | Yes | Yes |
| Bosch | 15 | 5 | Yes | Yes | Yes | Yes | Yes |
| ECOSMART | N/A | N/A | Yes | No | No | Yes | No |
| Drakken | 1 | 1 | Yes | No | Yes | Yes | Yes |
| Eccotemp | 10 | 5 | Yes | Yes | Yes | Yes | Yes |
| EcoSmart / Eemax | Lifetime | Lifetime | Yes | No | No | Yes | No |
| Marey | 5 | 5 | Yes | Yes | Yes | Yes | Yes |
| Navien | 8-15 | 3-5 | No | Yes | Yes | Yes | Yes |
| Noritz | 12 | 5 | No | Yes | Yes | Yes | Yes |
| Rheem | 12 | 5 | Yes | Yes | Yes | Yes | Yes |
| RINNAI | 12 | 5 | No | Yes | Yes | Yes | Yes |
| Ruud | 12 | 5 | No | Yes | Yes | Yes | Yes |
| Seisco | 10 | 10 | Yes | Yes | Yes | Yes | Yes |
| Stiebel Eltron | 3 | 3 | Yes | No | No | Yes | No |
| Takagi | 10-15 | 5 | No | Yes | Yes | Yes | Yes |
| Titan/Niagara | 10 | 10 | Yes | no | no | Yes | no |