Commercial water heatersENERGY STAR certified
Intellihot iQ751 Gen II
751 kBtu/h gas tankless water heater.
Input rate
751 kBtu/h
Storage
3 gal
Thermal efficiency
0.96
Fuel
Gas, Propane
Of 207 certified gas tankless commercial water heaters, 173 have a higher thermal efficiency than the iQ751 Gen II (0.96).
- Maker
- Intellihot
- Model
- iQ751 Gen II
- Type
- Gas Tankless
- Fuel
- Gas, Propane
- Storage
- 3 gal
- Thermal efficiency
- 0.96
- Input rate
- 751 kBtu/h
- Vent
- Direct Vent
- On the market since
- Aug 2013
- ENERGY STAR certified
- 22 May 2026
Certified under the same record
The maker lists these as the same machine or a variant of it: iQ1001, (Max BTU rating is 1001, 000 BTU/Hr), iQ1501, (Max BTU rating is 1501, iQ751, (Max BTU rating is 751.
Source: ENERGY STAR certified commercial water heaters dataset, US EPA, record 2333065, data build 2026-09-29. Figures are as the maker certified them. How we use this data.
Other makers
Machines comparable to the iQ751 Gen II
Certified commercial water heaters from other makers, same color class, within 20% of its speed.
| Model | Type | Fuel | Storage | Input rate |
|---|---|---|---|---|
| Rinnai RCW750AN | Gas Tankless | Gas, Propane | 6 gal | 750 kBtu/h |
| Lochinvar IWH0750L | Gas Tankless | Propane | 7 gal | 750 kBtu/h |
| Lochinvar IWH0750N | Gas Tankless | Gas | 7 gal | 750 kBtu/h |
| Trinity LX800WH | Gas Tankless | Gas | 5 gal | 800 kBtu/h |
| Lochinvar AWH0800L SERIES 1** | Gas Tankless | Propane | 7 gal | 800 kBtu/h |
| Lochinvar AWH0800N SERIES 1** | Gas Tankless | Gas | 7 gal | 800 kBtu/h |
Intellihot
More Intellihot commercial water heaters
| Model | Type | Fuel | Storage | Input rate |
|---|---|---|---|---|
| iQ251 | Gas Tankless | Gas, Propane | 1 gal | 250 kBtu/h |
| iQ1001 Gen II | Gas Tankless | Gas, Propane | 4 gal | 1,001 kBtu/h |
| iN501 | Gas Tankless | Gas, Propane | 2 gal | - |
| iQ1501 | Gas Tankless | Gas, Propane | 6 gal | 1,501 kBtu/h |
| iQ3001 | Gas Tankless | Gas, Propane | 12 gal | 3,001 kBtu/h |
| I250 | Gas Tankless | Gas, Propane | 0 gal | 250 kBtu/h |
| iQ2001 | Gas Tankless | Gas, Propane | 8 gal | 2,000 kBtu/h |
| Electron iE1 | Electric Heat Pump | Electric | 6 gal | - |