Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
Both the Peerless Series GM GM-e-05 and the Peerless Series GM GM-e-06 belong to the Peerless Boilers Series GM line of non-condensing boilers. Published ratings: Peerless Series GM GM-e-05 at 214.5 MBH input, 182 MBH heating capacity and 84.2% AFUE; Peerless Series GM GM-e-06 at 268 MBH input, 226 MBH heating capacity and 84% AFUE. Peerless Series GM GM-e-06 lists 53.5 MBH more input than Peerless Series GM GM-e-05 (268 MBH against 214.5 MBH). Peerless Series GM GM-e-05 carries the higher published AFUE at 84.2%, against 84%.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Peerless Series GM GM-e-05 | Peerless Series GM GM-e-06 |
|---|---|---|
| Input | 214.5 MBH | 268 MBH |
| Heating capacity | 182 MBH | 226 MBH |
| Net water rating | 158 MBH | 197 MBH |
| Efficiency (AFUE) | 84.2 % | 84 % |
| Domestic hot water | Heating-only boiler — domestic hot water comes from a separate indirect tank or water heater | Heating-only boiler — domestic hot water comes from a separate indirect tank or water heater |
| Dimensions (A × B × C) | 25-3/4" × 19-1/4" × 35-1/4" | 25-3/4" × 22-3/4" × 35-1/4" |
| Fuel | Natural gas or LP gas | Natural gas or LP gas |
| Vent connector | 7" | 8" |
| Control | Spark pilot ignition | Spark pilot ignition |
Published ratings: the Peerless Series GM GM-e-05 is rated 214.5 MBH input, 182 MBH heating capacity and 84.2% AFUE; the Peerless Series GM GM-e-06 is rated 268 MBH input, 226 MBH heating capacity and 84% AFUE. Peerless Series GM GM-e-06 lists 53.5 MBH more input than Peerless Series GM GM-e-05 (268 MBH against 214.5 MBH). Peerless Series GM GM-e-05 carries the higher published AFUE at 84.2%, against 84%.
The dimensions differs: the Peerless Series GM GM-e-05 lists 25-3/4" × 19-1/4" × 35-1/4", while the Peerless Series GM GM-e-06 lists 25-3/4" × 22-3/4" × 35-1/4". The vent connector differs: the Peerless Series GM GM-e-05 lists 7", while the Peerless Series GM GM-e-06 lists 8".
Both records print the same domestic-hot-water arrangement (Heating-only boiler — domestic hot water comes from a separate indirect tank or water heater), fuel (Natural gas or LP gas) and control (Spark pilot ignition), per the cited sources.
Peerless Boilers
The Peerless Series GM GM-e-05 is a current semi-commercial cast-iron gas boiler firing 214.5 MBH for 182 MBH heating capacity and a 158 MBH net water rating at 84.2% AFUE, in a natural-draft chimney package sized for single, multiple or modular installations.
Peerless Boilers
The Peerless Series GM GM-e-06 is a current semi-commercial cast-iron gas boiler firing 268 MBH for 226 MBH heating capacity and a 197 MBH net water rating at 84% AFUE, in a natural-draft chimney package sized for single, multiple or modular installations.
The Peerless Series GM GM-e-06 lists 268 MBH, against 214.5 MBH on the Peerless Series GM GM-e-05, per the cited documentation.
The Peerless Series GM GM-e-05 carries the higher published AFUE at 84.2%, against 84%.
A consultation includes a heat-loss review so the size is right the first time.
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.