9 certified models
Intellihot commercial water heaters
Every Intellihot water heater certified under ENERGY STAR and listed for the US market, fastest first. Each model page has the full certified specs and comparable machines from other makers.
| Model | Type | Fuel | Storage | Input rate |
|---|---|---|---|---|
| Electron iE1 | Electric Heat Pump | Electric | 6 gal | - |
| I250 | Gas Tankless | Gas, Propane | 0 gal | 250 kBtu/h |
| iN501 | Gas Tankless | Gas, Propane | 2 gal | - |
| iQ1001 Gen II | Gas Tankless | Gas, Propane | 4 gal | 1,001 kBtu/h |
| iQ1501 | Gas Tankless | Gas, Propane | 6 gal | 1,501 kBtu/h |
| iQ2001 | Gas Tankless | Gas, Propane | 8 gal | 2,000 kBtu/h |
| iQ251 | Gas Tankless | Gas, Propane | 1 gal | 250 kBtu/h |
| iQ3001 | Gas Tankless | Gas, Propane | 12 gal | 3,001 kBtu/h |
| iQ751 Gen II | Gas Tankless | Gas, Propane | 3 gal | 751 kBtu/h |
Source: ENERGY STAR certification data, US EPA. Data build 2026-09-29. Brand names are as the maker certified them, with obvious variant spellings merged.