Lochinvar offers 11 gas water heaters models in the lineup we track. This page is the Lochinvar-specific cut of the broader Gas Water Heaters water heaters category — same product class, narrowed to the Lochinvar catalog only.
About Lochinvar
Lochinvar — Commercial water heaters and boilers, plumber-channel.
For the complete Lochinvar lineup across all sub-types and capacities, see the Lochinvar Water Heaters hub.
Lochinvar Gas Water Heaters models we track
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Lochinvar Knight 199K Combi Boiler Water Heater (WHN199) — Knight combi — boiler + water heater in one unit, modulating condensing.
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Lochinvar NOBLE NKC199 199 MBH Wall-Hung Combi Boiler (NKC199-N) — Lochinvar NOBLE 199,000 BTU wall-hung condensing combi boiler — volume Lochinvar combi. 5.4 GPM DHW at 70F rise, 95% AFUE, 10:1 turndown. Stainless steel fire-t...
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Lochinvar ARMOR AWN-501 119-Gallon Condensing Commercial Water Heater (AWN-501) — Lochinvar ARMOR 119-gallon condensing commercial gas — 500 MBH input, 95% thermal efficiency. PVC venting allows install without dedicated flue. For commercial...
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Lochinvar EnergyRite ERN-650 Commercial Gas Water Heater (ERN-650) — Commercial-grade Lochinvar — 650K BTU for restaurants, hotels, multifamily.
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Lochinvar ARMOR AWN-701 119-Gallon Condensing Commercial Water Heater (AWN-701) — Lochinvar ARMOR 119-gallon condensing commercial — 700 MBH input, 95% thermal efficiency. Higher-capacity ARMOR for commercial properties with simultaneous high...
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Lochinvar KNIGHT WHN155 155 MBH Wall-Hung Combi Boiler (WHN155) — Lochinvar KNIGHT 155,000 BTU wall-hung fire-tube combi boiler — mid-size Knight combi. 4.5 GPM DHW. 95% AFUE. 10-year heat exchanger warranty. Common pick for 2...
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Lochinvar NOBLE NKC110 110 MBH Wall-Hung Combi Boiler (NKC110-N) — Lochinvar NOBLE 110,000 BTU wall-hung condensing combi boiler — provides both space heating and domestic hot water from a single unit. 4 GPM DHW at 70F rise, 95...
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Lochinvar KNIGHT WHN85 85 MBH Wall-Hung Combi Boiler (WHN085) — Lochinvar KNIGHT 85,000 BTU wall-hung fire-tube combi boiler — entry-level Knight combi. 3.4 GPM DHW. 95% AFUE. For smaller homes or replacement of cast-iron bo...
Other Gas water heaters brands
If you're cross-shopping gas water heaters beyond Lochinvar, the following brands also ship in this category:
About Gas Water Heaters water heaters
Natural gas water heaters dominate US residential water heating where natural gas service is available — roughly 49% of US homes have gas water heaters. They split into tank (40/50/75/80-gallon storage with gas burner) and tankless (on-demand condensing) sub-types, with venting variations (atmospheric chimney, power-vent PVC, direct-vent sealed combustion) that determine which install scenarios fit.
- Operating cost: natural gas is consistently the cheapest residential water heater fuel by per-BTU pricing in most US markets — typically 50–60% of equivalent electric resistance cost
- Recovery speed: a 40,000 BTU gas burner delivers ~40 GPH at 90°F rise — tw...
For the complete gas buyer's guide (all brands, full comparison framework), see the Gas Water Heaters category hub.
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