Lochinvar IWH1000N

Lochinvar IWH1000N appears in the U.S. EPA ENERGY STAR "Certified Commercial Water Heaters" dataset, which lists products whose manufacturers have certified them to the program's specification (record 4656815, certified 2026-06-26). EPA publishes these rated values for the listing: Type Gas Tankless; Fuel Gas; Vent type Direct Vent; Storage volume (gal) 9; Vent size (in) 6; Input rate (thousand Btu/h) 1000; Thermal efficiency TE 0.97. The listing records ENERGY STAR certification and the rated values the manufacturer reported to EPA. It is not a determination that any building, installation or design complies with a code.