Commercial water heatersENERGY STAR certified
Velocity Boiler Works PHX400C
399 kBtu/h gas tankless water heater.
Input rate
399 kBtu/h
Storage
4 gal
Thermal efficiency
0.98
Fuel
Gas, Propane
Of 207 certified gas tankless commercial water heaters, 9 have a higher thermal efficiency than the PHX400C (0.98).
- Maker
- Velocity Boiler Works
- Model
- PHX400C
- Type
- Gas Tankless
- Fuel
- Gas, Propane
- Storage
- 4 gal
- Thermal efficiency
- 0.98
- Input rate
- 399 kBtu/h
- Vent
- Direct Vent
- On the market since
- Aug 2025
- ENERGY STAR certified
- 31 Jul 2025
Source: ENERGY STAR certified commercial water heaters dataset, US EPA, record 4480979, data build 2026-09-29. Figures are as the maker certified them. How we use this data.
Other makers
Machines comparable to the PHX400C
Certified commercial water heaters from other makers, same color class, within 20% of its speed.
| Model | Type | Fuel | Storage | Input rate |
|---|---|---|---|---|
| Trinity LX400WH | Gas Tankless | Gas, Propane | 2 gal | 399 kBtu/h |
| Lochinvar AWH0400N SERIES 1** | Gas Tankless | Gas | 4 gal | 399 kBtu/h |
| Lochinvar AWH0400L SERIES 1** | Gas Tankless | Propane | 4 gal | 399 kBtu/h |
| HTP ELX-400FVWH | Gas Tankless | Gas, Propane | 3 gal | 399 kBtu/h |
| A. O. Smith PWH0400NP* | Gas Tankless | Gas, Propane | 4 gal | 399 kBtu/h |
| Laars NT2V0399 | Gas Tankless | Gas | 4 gal | 399 kBtu/h |
Velocity Boiler Works
More Velocity Boiler Works commercial water heaters
| Model | Type | Fuel | Storage | Input rate |
|---|---|---|---|---|
| PHXW400 | Gas Tankless | Gas, Propane | 4 gal | 399 kBtu/h |
| PHXW500 | Gas Tankless | Gas, Propane | 5 gal | 500 kBtu/h |
| PHXW650 | Gas Tankless | Gas, Propane | 6 gal | 650 kBtu/h |
| PHXW800 | Gas Tankless | Gas, Propane | 7 gal | 800 kBtu/h |
| PHXW1000L | Gas Tankless | Gas, Propane | 9 gal | 999 kBtu/h |
| PHX1000C-O | Gas Tankless | Gas, Propane | 9 gal | 999 kBtu/h |
| PHX800C-O | Gas Tankless | Gas, Propane | 7 gal | 800 kBtu/h |
| PHX400C-O | Gas Tankless | Gas, Propane | 4 gal | 399 kBtu/h |