Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The CB470W and CB500W are the two largest Commodore Wall models and are physically identical: 198 lb, 2.7 gallons rated volume and 6-inch vent/air connections with 200-foot vent runs. The CB470W prints the line's highest thermal efficiency (95.6% vs 95.1%) and a higher turndown (5.7:1 vs 6:1 — the CB470W's ratio is higher); the CB500W adds 30 MBH of ceiling.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Ideal Commodore Wall CB470W | Ideal Commodore Wall CB500W |
|---|---|---|
| Input, minimum | 83 MBH | 83 MBH |
| Input, maximum | 470 MBH | 500 MBH |
| Output | 453 MBH | 475 MBH |
| Net AHRI rating | 394 MBH | 413 MBH |
| Thermal efficiency | 95.6 % | 95.1 % |
| Turndown ratio | 5.7:1 | 6:1 |
| Rated volume | 2.7 gal | 2.7 gal |
| Weight | 198 lb | 198 lb |
The CB470W and CB500W share the larger Commodore Wall configuration: 17.5 x 33.33 x 21.2 inches, 198 lb, 2.7 gallons rated volume, 1-1/2-inch supply/return, 1-inch gas and 6-inch vent/air connections with 200-foot published vent lengths. Both fire from the same 83 MBH minimum and are field-convertible between natural gas and propane.
Capacity and efficiency separate them. The CB470W fires to 470 MBH with a 5.7:1 turndown, 453 MBH output, a 394 MBH net AHRI rating and printed rows of 95.6% thermal and 95.1% combustion efficiency — the highest thermal figure in the line. The CB500W fires to 500 MBH with a 6:1 turndown, 475 MBH output, a 413 MBH net AHRI rating and printed rows of 95.1% thermal and 94.5% combustion efficiency.
Both support cascade installations up to 16 boilers, and both appear in the larger Commodore Wall Cascade racks — the CB470W from RS0940BL2D3 through RS2820BL6D4, and the CB500W in RS1000BL2D3 through RS3000BL6D4, where six boilers reach 3,000 MBH total input.
Ideal Heating
The Ideal Commodore Wall CB470W is a commercial wall-hung condensing boiler: 83 to 470 MBH input with the line's highest printed thermal efficiency at 95.6%, a 394 MBH net AHRI rating and 6-inch venting.
Ideal Heating
The Ideal Commodore Wall CB500W is the largest Commodore Wall model: 83 to 500 MBH input, 95.1% printed thermal efficiency, a 413 MBH net AHRI rating and 6-inch venting for commercial plants.
Yes — both are 17.5 x 33.33 x 21.2 inches at 198 lb with 2.7 gallons rated volume and 6-inch vent/air connections.
The CB470W: 95.6% thermal and 95.1% combustion against the CB500W's 95.1% thermal and 94.5% combustion.
The CB470W appears in racks from RS0940BL2D3 up to RS2820BL6D4; the CB500W in RS1000BL2D3 up to RS3000BL6D4, with 3,000 MBH total input at six boilers.
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.