Skip to content
BusinessMachines.com
Menu

Commercial water heatersENERGY STAR certified

Rinnai RCW399AN

399 kBtu/h gas tankless water heater.

Input rate

399 kBtu/h

Storage

2 gal

Thermal efficiency

0.98

Fuel

Gas, Propane

Of 207 certified gas tankless commercial water heaters, 9 have a higher thermal efficiency than the RCW399AN (0.98).

Maker
Rinnai
Model
RCW399AN
Type
Gas Tankless
Fuel
Gas, Propane
Storage
2 gal
Thermal efficiency
0.98
Input rate
399 kBtu/h
Vent
Direct Vent
On the market since
Sep 2025
ENERGY STAR certified
16 Jul 2025

Source: ENERGY STAR certified commercial water heaters dataset, US EPA, record 4478583, data build 2026-09-29. Figures are as the maker certified them. How we use this data.

Other makers

Machines comparable to the RCW399AN

Certified commercial water heaters from other makers, same color class, within 20% of its speed.

ModelTypeFuelStorageInput rate
Trinity LX400WHGas TanklessGas, Propane2 gal399 kBtu/h
Lochinvar AWH0400N SERIES 1**Gas TanklessGas4 gal399 kBtu/h
Lochinvar AWH0400L SERIES 1**Gas TanklessPropane4 gal399 kBtu/h
HTP ELX-400FVWHGas TanklessGas, Propane3 gal399 kBtu/h
A. O. Smith PWH0400NP*Gas TanklessGas, Propane4 gal399 kBtu/h
Laars NT2V0399Gas TanklessGas4 gal399 kBtu/h

Rinnai

More Rinnai commercial water heaters

ModelTypeFuelStorageInput rate
CHS398100HCXVINGas StorageGas, Propane119 gal398 kBtu/h
CHS19980HCXINGas StorageGas, Propane80 gal199 kBtu/h
CHS16080HCXINGas StorageGas, Propane80 gal160 kBtu/h
CHS199100HCXINGas StorageGas, Propane119 gal199 kBtu/h
CHS398100HCXINGas StorageGas, Propane119 gal398 kBtu/h
CHS160100HCXINGas StorageGas, Propane119 gal160 kBtu/h
CHS320100HCXVINGas StorageGas, Propane119 gal320 kBtu/h
CHS398100HCXVAINGas StorageGas, Propane119 gal398 kBtu/h

All Rinnai commercial water heaters