Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
Peerless Cast 92-2 and Peerless Cast 92-4 are two condensing boilers from the Peerless Boilers Cast 92 line. Published ratings: Peerless Cast 92-2 at 40–199 MBH input and 184 MBH output; Peerless Cast 92-4 at 80–399 MBH input and 370 MBH output. The published input differs: Peerless Cast 92-2 lists 40–199 MBH, while Peerless Cast 92-4 lists 80–399 MBH.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Peerless Cast 92-2 | Peerless Cast 92-4 |
|---|---|---|
| Input | 40–199 MBH | 80–399 MBH |
| 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 |
| Water volume | 4.75 gal | 7.125 gal |
| Venting | Sealed combustion, direct vent — 3" flue | Sealed combustion, direct vent — 4" flue |
| Electrical | 120VAC/60Hz/1PH, 2.75 A | 120VAC/60Hz/1PH, 5 A |
| Output | 184 MBH | 370 MBH |
| Net rating | 148 MBH | 322 MBH |
| Gas pressure (W.C.) | 2"–14" | 2"–14" |
| Flow | 2–36 GPM | 4–72 GPM |
| Boiler H.P. | 5.3 | 10.6 |
| Ignition | Direct spark | Direct spark |
Published ratings: the Peerless Cast 92-2 is rated 40–199 MBH input and 184 MBH output; the Peerless Cast 92-4 is rated 80–399 MBH input and 370 MBH output. The published input differs: Peerless Cast 92-2 lists 40–199 MBH, while Peerless Cast 92-4 lists 80–399 MBH.
The boiler water content differs: the Peerless Cast 92-2 lists 4.75 gal, while the Peerless Cast 92-4 lists 7.125 gal. The venting differs: the Peerless Cast 92-2 lists Sealed combustion, direct vent — 3" flue, while the Peerless Cast 92-4 lists Sealed combustion, direct vent — 4" flue. The electrical requirement differs: the Peerless Cast 92-2 lists 120VAC/60Hz/1PH, 2.75 A, while the Peerless Cast 92-4 lists 120VAC/60Hz/1PH, 5 A.
Both records print the same domestic-hot-water arrangement (Heating-only boiler — domestic hot water comes from a separate indirect tank or water heater), gas pressure (2"–14") and ignition (Direct spark), per the cited sources.
Peerless Boilers
The Peerless Cast 92-2 is the legacy residential gas-fired condensing cast-iron boiler: a single-model line with a 40–199 MBH CSA input range whose 199 MBH rating row prints 184 MBH output and a 148 MBH net rating at 90% AFUE (ENERGY STAR certified), sealed-combustion direct vent with a 3" flue, 4.75 gallons of water and a HeatNet text-display control.
Peerless Boilers
The Peerless Cast 92-4 is the legacy commercial or large-residential gas-fired condensing cast-iron boiler: a single-model line with an 80–399 MBH CSA input range whose 399 MBH rating row prints 370 MBH output and a 322 MBH net rating at 92.7% thermal efficiency (87.7% combustion efficiency), sealed-combustion direct vent with a 4" flue, 7.125 gallons of water and a cascade-ready HeatNet control.
The Peerless Cast 92-2 lists 40–199 MBH, while the Peerless Cast 92-4 lists 80–399 MBH, per the cited documentation.
The Peerless Cast 92-4 lists 370 MBH, against 184 MBH on the Peerless Cast 92-2.
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.