Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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A. O. Smith · Series
The Burkay Genesis is A. O. Smith's discontinued commercial gas-fired circulating water heater line — the GWH-400 through GWH-2500 models — documented on hotwater.com as 'Series Discontinued' with official replacement parts lists.
Series facts
A. O. Smith's commercial catalogue lists Burkay Genesis as a circulating water-heater sub-brand. Every GWH support page captured in this batch is titled 'Series Discontinued: A. O. Smith Burkay Genesis Circulating Water Heater <model>' and prints 'SERIES DISCONTINUED'. The line is gas-fired; the official Genesis parts lists print natural-gas and LP gas valve, orifice and burner rows.
The officially listed GWH models are GWH-400, GWH-500, GWH-750, GWH-750N, GWH-1000, GWH-1300, GWH-1500, GWH-1850 and GWH-2500. A sibling GW listing covers GW-200 through GW-2500 including GW-2100; there is no GWH-2100 support page. Boilers.ca records the GWH models as discontinued DHW-only appliances — they are water heaters, not space-heating boilers — so that searches resolve to the official listing instead of a dead link.
The official pages do not print input, output, efficiency or connection ratings for the GWH line; the support-page Tech Specs fields carry placeholder values and link only the parts lists. The model records therefore carry the official status, appliance type and documented fuel availability only. A. O. Smith's current commercial boiler line is the Conservationist Burkay HW series.
Highlights
Models
One canonical page per model with input, output and efficiency kept separate.
A. O. Smith
The A. O. Smith Burkay Genesis GWH-400 is a discontinued commercial gas-fired circulating water heater — officially listed under "Series Discontinued" — documented by the official support page and the Genesis Water Heaters 400-750 replacement parts list.
A. O. Smith
The A. O. Smith Burkay Genesis GWH-500 is a discontinued commercial gas-fired circulating water heater — officially listed under "Series Discontinued" — documented by the official support page and the Genesis Water Heaters 400-750 replacement parts list.
A. O. Smith
The A. O. Smith Burkay Genesis GWH-750 is a discontinued commercial gas-fired circulating water heater — officially listed under "Series Discontinued" — documented by the official support page and the Genesis Water Heaters 400-750 replacement parts list.
A. O. Smith
The A. O. Smith Burkay Genesis GWH-750N is a discontinued commercial gas-fired circulating water heater — officially listed under "Series Discontinued" — documented by the official support page and the Genesis Water Heaters 400-750 replacement parts list.
A. O. Smith
The A. O. Smith Burkay Genesis GWH-1000 is a discontinued commercial gas-fired circulating water heater — officially listed under "Series Discontinued" — documented by the official support page and the Genesis Water Heaters 1000-2100 replacement parts list.
A. O. Smith
The A. O. Smith Burkay Genesis GWH-1300 is a discontinued commercial gas-fired circulating water heater — officially listed under "Series Discontinued" — documented by the official support page and the Genesis Water Heaters 1000-2100 replacement parts list.
A. O. Smith
The A. O. Smith Burkay Genesis GWH-1500 is a discontinued commercial gas-fired circulating water heater — officially listed under "Series Discontinued" — documented by the official support page and the Genesis Water Heaters 1000-2100 replacement parts list.
A. O. Smith
The A. O. Smith Burkay Genesis GWH-1850 is a discontinued commercial gas-fired circulating water heater — officially listed under "Series Discontinued" — documented by the official support page and the Genesis Water Heaters 1000-2100 replacement parts list.
A. O. Smith
The A. O. Smith Burkay Genesis GWH-2500 is a discontinued commercial gas-fired circulating water heater — officially listed under "Series Discontinued" — documented by the official support page and the Genesis Water Heaters 1000-2100 replacement parts list.
| Specification | A. O. Smith Burkay Genesis GWH-400 | A. O. Smith Burkay Genesis GWH-500 | A. O. Smith Burkay Genesis GWH-750 | A. O. Smith Burkay Genesis GWH-750N | A. O. Smith Burkay Genesis GWH-1000 | A. O. Smith Burkay Genesis GWH-1300 | A. O. Smith Burkay Genesis GWH-1500 | A. O. Smith Burkay Genesis GWH-1850 | A. O. Smith Burkay Genesis GWH-2500 |
|---|---|---|---|---|---|---|---|---|---|
| input-min | — | — | — | — | — | — | — | — | — |
| input-max | — | — | — | — | — | — | — | — | — |
| output-max | — | — | — | — | — | — | — | — | — |
| afue | — | — | — | — | — | — | — | — | — |
| turndown | — | — | — | — | — | — | — | — | — |
| vent-max-3 | — | — | — | — | — | — | — | — | — |
| vent-max-2 | — | — | — | — | — | — | — | — | — |
| weight | — | — | — | — | — | — | — | — | — |
Read the full comparison: A. O. Smith Burkay Genesis GWH-400 vs GWH-750 →
Read the full comparison: A. O. Smith Burkay Genesis GWH-1000 vs GWH-2500 →
Read the full comparison: A. O. Smith Burkay Genesis GWH-1000 vs GWH-1300 →
Read the full comparison: A. O. Smith Burkay Genesis GWH-1300 vs GWH-1500 →
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 A. O. Smith boilers
No. A. O. Smith titles the GWH support pages 'Burkay Genesis Circulating Water Heater'. The current A. O. Smith commercial boiler is the Conservationist Burkay HW series; Genesis is a water-heater sub-brand.
GWH-400, GWH-500, GWH-750, GWH-750N, GWH-1000, GWH-1300, GWH-1500, GWH-1850 and GWH-2500. There is no GWH-2100 page; the 2100 size appears as GW-2100 in the sibling GW listing.
No. The official support pages print no input, output, efficiency or connection table for the GWH line — only the discontinued status and the parts lists. Boilers.ca records exactly that and does not invent values.
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.