Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
Boilers.ca is a brand of ROMA Heating & Cooling · Licensed gas contractor LGA0202903
Comparison
Verdict in brief
Both the Peerless Series MIHII MIHII-03 and the Peerless Series MIHII MIHII-05 belong to the Peerless Boilers Series MIHII line of non-condensing boilers. The Peerless Series MIHII MIHII-03 is rated 65 MBH input, 55 MBH heating capacity and 84.1% AFUE, and the Peerless Series MIHII MIHII-05 is rated 130 MBH input, 110 MBH heating capacity and 84% AFUE. Peerless Series MIHII MIHII-05 lists 65 MBH more input than Peerless Series MIHII MIHII-03 (130 MBH against 65 MBH). Peerless Series MIHII MIHII-03 carries the higher published AFUE at 84.1%, against 84%.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Peerless Series MIHII MIHII-03 | Peerless Series MIHII MIHII-05 |
|---|---|---|
| Input | 65 MBH | 130 MBH |
| Heating capacity | 55 MBH | 110 MBH |
| Net water rating | 48 MBH | 96 MBH |
| Efficiency (AFUE) | 84.1 % | 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 |
| Boiler water content | 4.72 gal | 7.28 gal |
| Venting | Natural draft into a conventional chimney | Natural draft into a conventional chimney |
| Ignition and controls | Spark pilot ignition; low-water cutoff | Spark pilot ignition; low-water cutoff |
| Fuel | Natural gas | Natural gas |
Published ratings: the Peerless Series MIHII MIHII-03 is rated 65 MBH input, 55 MBH heating capacity and 84.1% AFUE; the Peerless Series MIHII MIHII-05 is rated 130 MBH input, 110 MBH heating capacity and 84% AFUE. Peerless Series MIHII MIHII-05 lists 65 MBH more input than Peerless Series MIHII MIHII-03 (130 MBH against 65 MBH). Peerless Series MIHII MIHII-03 carries the higher published AFUE at 84.1%, against 84%.
The boiler water content differs: the Peerless Series MIHII MIHII-03 lists 4.72 gal, while the Peerless Series MIHII MIHII-05 lists 7.28 gal.
Both records print the same domestic-hot-water arrangement (Heating-only boiler — domestic hot water comes from a separate indirect tank or water heater), venting (Natural draft into a conventional chimney), control (Spark pilot ignition; low-water cutoff) and fuel (Natural gas), per the cited sources.
Peerless Boilers
The Peerless Series MIHII MIHII-03 is the smallest Series MIHII size of the legacy mid-efficiency cast-iron gas water line: 65 MBH fixed input for 55 MBH heating capacity and a 48 MBH net water rating at 84.1% AFUE, with 4.72 US gallons of boiler water content, a low-water cutoff and natural-draft venting.
Peerless Boilers
The Peerless Series MIHII MIHII-05 is a 130 MBH mid size of the legacy mid-efficiency cast-iron gas water line: 130 MBH fixed input for 110 MBH heating capacity and a 96 MBH net water rating at 84% AFUE, with 7.28 US gallons of boiler water content, a low-water cutoff and natural-draft venting.
The Peerless Series MIHII MIHII-05 lists 130 MBH, against 65 MBH on the Peerless Series MIHII MIHII-03, per the cited documentation.
The Peerless Series MIHII MIHII-03 carries the higher published AFUE at 84.1%, 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.