Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
Peerless Series CC CC-05 and Peerless Series CC CC-06 are two non-condensing boilers from the Peerless Boilers Series CC line. Published ratings: Peerless Series CC CC-05 at 722 MBH gas input, 540 MBH net water rating and 81.3% gas thermal efficiency; Peerless Series CC CC-06 at 938 MBH gas input, 663 MBH net water rating and 81.2% gas thermal efficiency. Peerless Series CC CC-06 lists 216 MBH more gas input than Peerless Series CC CC-05 (938 MBH against 722 MBH). Peerless Series CC CC-05 carries the higher published gas thermal efficiency at 81.3%, against 81.2%. Peerless Series CC CC-06 lists 405 lb more shipping weight than Peerless Series CC CC-05 (2,933 lb against 2,528 lb).
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Peerless Series CC CC-05 | Peerless Series CC CC-06 |
|---|---|---|
| Net water rating | 540 MBH | 663 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 content | 49 gal | 56 gal |
| Boiler working weight | 2,528 lb | 2,933 lb |
| Venting | Forced draft with a power burner | Forced draft with a power burner |
| Fuel | Natural gas or oil (combination gas/oil configurations) | Natural gas or oil (combination gas/oil configurations) |
| Gas input | 722 MBH | 938 MBH |
| Oil input | 5 GPH | 6.5 GPH |
| Gross output | 587 MBH | 762 MBH |
| Net steam rating | 441 MBH | 572 MBH |
| Gas thermal efficiency | 81.3 % | 81.2 % |
| Oil thermal efficiency | 83.9 % | 83.7 % |
| Boiler horsepower | 17.5 | 22.8 |
| Heating surface | 47.7 sq ft | 59.7 sq ft |
Published ratings: the Peerless Series CC CC-05 is rated 722 MBH gas input, 540 MBH net water rating and 81.3% gas thermal efficiency; the Peerless Series CC CC-06 is rated 938 MBH gas input, 663 MBH net water rating and 81.2% gas thermal efficiency. Peerless Series CC CC-06 lists 216 MBH more gas input than Peerless Series CC CC-05 (938 MBH against 722 MBH). Peerless Series CC CC-05 carries the higher published gas thermal efficiency at 81.3%, against 81.2%.
Peerless Series CC CC-06 lists 405 lb more shipping weight than Peerless Series CC CC-05 (2,933 lb against 2,528 lb). The boiler water content differs: the Peerless Series CC CC-05 lists 49 gal, while the Peerless Series CC CC-06 lists 56 gal. The boiler horsepower differs: the Peerless Series CC CC-05 lists 17.5, while the Peerless Series CC CC-06 lists 22.8. The heating surface differs: the Peerless Series CC CC-05 lists 47.7 sq ft, while the Peerless Series CC CC-06 lists 59.7 sq ft.
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 (Forced draft with a power burner) and fuel (Natural gas or oil (combination gas/oil configurations)), per the cited sources.
Peerless Boilers
The Peerless Series CC CC-05 is a current commercial cast-iron steam or hot water boiler firing 722 MBH gas (5 GPH oil) for 587 MBH gross output, a 441 MBH net steam rating (1725 sq ft) and a 540 MBH net water rating at 81.3% gas thermal efficiency on a forced-draft power burner.
Peerless Boilers
The Peerless Series CC CC-06 is a current commercial cast-iron steam or hot water boiler firing 938 MBH gas (6.5 GPH oil) for 762 MBH gross output, a 572 MBH net steam rating (2382 sq ft) and a 663 MBH net water rating at 81.2% gas thermal efficiency on a forced-draft power burner.
The Peerless Series CC CC-06 lists 938 MBH, against 722 MBH on the Peerless Series CC CC-05, per the cited documentation.
The Peerless Series CC CC-05 carries the higher published gas thermal efficiency at 81.3%, against 81.2%.
It ships at 2,933 lb against 2,528 lb for the Peerless Series CC CC-05, per the cited sources.
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.