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Lochinvar · Series
The Armor AWH is Lochinvar's floor-standing commercial condensing water heater in ten sizes from AWH0400NPM to AWH4000NPM (399,000 to 4,000,000 BTU/hr input), rated up to 99% thermal efficiency with 10:1 turndown on the 400-1000 models and 5:1 on the 1250-4000 models.
Series facts
The Armor AWH is the floor-mounted commercial water heater of the Armor family: ten models from AWH0400NPM (399,000 BTU/hr) through AWH4000NPM (4,000,000 BTU/hr), each printed in the AWH-Sub-06 submittal with its input, thermal efficiency and recovery rate in gallons per hour at a 100°F rise. The 400 and 500 models are rated 99% thermal efficiency with a 10:1 turndown; the 650 through 4000 models are rated 98% with a 5:1 turndown on the larger sizes. The submittal prints ship weights from 326 lb (AWH0400NPM) to 3,694 lb (AWH4000NPM), gas connections from 1" to 2-1/2", water connections from 2" to 4", air inlets of 4"-12" and vent sizes of 4"-12".
The product page describes the Armor as ENERGY STAR rated with the CON·X·US remote connect and a modulating burner, and the AWH-Sub-06 submittal prints a 5-year limited warranty with 1-year parts coverage. The AWH I&O is split by size — Rev E covers the 400-1000 models and Rev AB the 1250-4000 models — so owners should match the manual to the rating plate before servicing. Lochinvar's Canada English pages carry the same AWH line and the submittal's LP models carry no deration.
Highlights
The Armor product page and submittal print a 5-year limited warranty with 1-year parts coverage; the commercial Armor warranty sheet (WAR7009) is linked from the model pages.
Models
One canonical page per model with input, output and efficiency kept separate.
Lochinvar
The Lochinvar Armor AWH0400NPM is a floor-standing commercial condensing water heater rated 399,000 BTU/hr input at 99% thermal efficiency with 479 GPH recovery at a 100°F rise.
Lochinvar
The Lochinvar Armor AWH0500NPM is a floor-standing commercial condensing water heater rated 500,000 BTU/hr input at 99% thermal efficiency with 600 GPH recovery at a 100°F rise.
Lochinvar
The Lochinvar Armor AWH0650NPM is a floor-standing commercial condensing water heater rated 650,000 BTU/hr input at 98% thermal efficiency with 772 GPH recovery at a 100°F rise.
Lochinvar
The Lochinvar Armor AWH0800NPM is a floor-standing commercial condensing water heater rated 800,000 BTU/hr input at 98% thermal efficiency with 950 GPH recovery at a 100°F rise.
Lochinvar
The Lochinvar Armor AWH1000NPM is a floor-standing commercial condensing water heater rated 999,000 BTU/hr input at 98% thermal efficiency with 1,187 GPH recovery at a 100°F rise.
Lochinvar
The Lochinvar Armor AWH1250NPM is a floor-standing commercial condensing water heater rated 1,250,000 BTU/hr input at 98% thermal efficiency with 1,485 GPH recovery at a 100°F rise.
Lochinvar
The Lochinvar Armor AWH1500NPM is a floor-standing commercial condensing water heater rated 1,500,000 BTU/hr input at 98% thermal efficiency with 1,782 GPH recovery at a 100°F rise.
Lochinvar
The Lochinvar Armor AWH2000NPM is a floor-standing commercial condensing water heater rated 1,999,000 BTU/hr input at 98% thermal efficiency with 2,375 GPH recovery at a 100°F rise.
Lochinvar
The Lochinvar Armor AWH3000NPM is a floor-standing commercial condensing water heater rated 3,000,000 BTU/hr input at 98% thermal efficiency with 3,564 GPH recovery at a 100°F rise.
Lochinvar
The Lochinvar Armor AWH4000NPM is a floor-standing commercial condensing water heater rated 4,000,000 BTU/hr input at 98% thermal efficiency with 4,752 GPH recovery at a 100°F rise.
| Specification | Lochinvar Armor AWH0400NPM | Lochinvar Armor AWH0500NPM | Lochinvar Armor AWH0650NPM | Lochinvar Armor AWH0800NPM | Lochinvar Armor AWH1000NPM | Lochinvar Armor AWH1250NPM | Lochinvar Armor AWH1500NPM | Lochinvar Armor AWH2000NPM | Lochinvar Armor AWH3000NPM | Lochinvar Armor AWH4000NPM |
|---|---|---|---|---|---|---|---|---|---|---|
| input-min | — | — | — | — | — | — | — | — | — | — |
| Input | 399,000 BTU/hr | 500,000 BTU/hr | 650,000 BTU/hr | 800,000 BTU/hr | 999,000 BTU/hr | 1,250,000 BTU/hr | 1,500,000 BTU/hr | 1,999,000 BTU/hr | 3,000,000 BTU/hr | 4,000,000 BTU/hr |
| output-max | — | — | — | — | — | — | — | — | — | — |
| afue | — | — | — | — | — | — | — | — | — | — |
| Turndown | 10:1 on the 400-1000 models; 5:1 on the 1250-4000 models | 10:1 on the 400-1000 models; 5:1 on the 1250-4000 models | 10:1 on the 400-1000 models; 5:1 on the 1250-4000 models | 10:1 on the 400-1000 models; 5:1 on the 1250-4000 models | 10:1 on the 400-1000 models; 5:1 on the 1250-4000 models | 10:1 on the 400-1000 models; 5:1 on the 1250-4000 models | 10:1 on the 400-1000 models; 5:1 on the 1250-4000 models | 10:1 on the 400-1000 models; 5:1 on the 1250-4000 models | 10:1 on the 400-1000 models; 5:1 on the 1250-4000 models | 10:1 on the 400-1000 models; 5:1 on the 1250-4000 models |
| vent-max-3 | — | — | — | — | — | — | — | — | — | — |
| vent-max-2 | — | — | — | — | — | — | — | — | — | — |
| Shipping weight | 326 lb | 333 lb | 424 lb | 433 lb | 494 lb | 1,519 lb | 1,672 lb | 1,931 lb | 3,147 lb | 3,694 lb |
Read the full comparison: Lochinvar Armor AWH0400NPM vs AWH0500NPM →
Read the full comparison: Lochinvar Armor AWH3000NPM vs AWH4000NPM →
Read the full comparison: Lochinvar Armor AWH0500NPM vs AWH0650NPM →
Read the full comparison: Lochinvar Armor AWH0650NPM vs AWH0800NPM →
Error codes and alerts
No alerts documented for this series yet.
Manuals
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Services for Lochinvar boilers
Ten models: AWH0400NPM, AWH0500NPM, AWH0650NPM, AWH0800NPM, AWH1000NPM, AWH1250NPM, AWH1500NPM, AWH2000NPM, AWH3000NPM and AWH4000NPM, covering 399,000 to 4,000,000 BTU/hr input per AWH-Sub-06.
The AWH-Sub-06 submittal prints 99% thermal efficiency for the 400 and 500 models and 98% for the 650 through 4000 models, with a 10:1 turndown on the 400-1000 models and 5:1 on the 1250-4000 models.
The I&O manual is split by size: Rev E covers the AWH0400-AWH1000 models and Rev AB covers the AWH1250-AWH4000 models. Match the manual to the model number on the rating plate.
Describe what the boiler is doing and get a straight answer about the next step.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.