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Comparison
Verdict in brief
Both the Ideal Commodore Wall CB299W and the Ideal Commodore Wall CB470W belong to the Ideal Heating Commodore Wall line of condensing boilers. The Ideal Commodore Wall CB299W is documented at 46–299 MBH input, 289 MBH output and 95.1% efficiency, while the Ideal Commodore Wall CB470W is documented at 83–470 MBH input, 453 MBH output and 95.6% efficiency. Ideal Commodore Wall CB470W lists 171 MBH more input than Ideal Commodore Wall CB299W (470 MBH against 299 MBH). Ideal Commodore Wall CB470W carries the higher published efficiency at 95.6%, against 95.1%. Ideal Commodore Wall CB470W lists 14 lb more shipping weight than Ideal Commodore Wall CB299W (198 lb against 184 lb).
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Ideal Commodore Wall CB299W | Ideal Commodore Wall CB470W |
|---|---|---|
| Input, minimum | 46 MBH | 83 MBH |
| Input, maximum | 299 MBH | 470 MBH |
| Turndown ratio | 6.5:1 | 5.7:1 |
| Domestic hot water | Heating-only commercial boiler; DHW via a separate water heater or tank | Heating-only commercial boiler; DHW via a separate water heater or tank |
| Weight | 184 lb | 198 lb |
| Height | 33.33 in | 33.33 in |
| Width | 17.5 in | 17.5 in |
| Depth | 21.2 in | 21.2 in |
| Vent length | 200 ft | 200 ft |
| Supply / return water connections (MNPT) | 1-1/2 in | 1-1/2 in |
| Gas connection (NPT) | 1 in | 1 in |
| Output | 289 MBH | 453 MBH |
| Net AHRI rating | 238 MBH | 394 MBH |
| Efficiency (AFUE) | 95.1 % | 95.6 % |
| Rated volume | 2.1 gal | 2.7 gal |
| Flue connection, vent / air | 4 in | 6 in |
Published ratings: the Ideal Commodore Wall CB299W is rated 46–299 MBH input, 289 MBH output and 95.1% efficiency; the Ideal Commodore Wall CB470W is rated 83–470 MBH input, 453 MBH output and 95.6% efficiency. Ideal Commodore Wall CB470W lists 171 MBH more input than Ideal Commodore Wall CB299W (470 MBH against 299 MBH). Ideal Commodore Wall CB470W carries the higher published efficiency at 95.6%, against 95.1%.
Ideal Commodore Wall CB470W lists 14 lb more shipping weight than Ideal Commodore Wall CB299W (198 lb against 184 lb). The turndown differs: the Ideal Commodore Wall CB299W lists 6.5:1, while the Ideal Commodore Wall CB470W lists 5.7:1. The rated volume differs: the Ideal Commodore Wall CB299W lists 2.1 gal, while the Ideal Commodore Wall CB470W lists 2.7 gal. The flue connection, vent / air differs: the Ideal Commodore Wall CB299W lists 4 in, while the Ideal Commodore Wall CB470W lists 6 in.
Both records print the same domestic-hot-water arrangement (Heating-only commercial boiler; DHW via a separate water heater or tank), height (33.33 in), width (17.5 in) and depth (21.2 in), per the cited sources.
Ideal Heating
The Ideal Commodore Wall CB299W is the smallest commercial Commodore model: 46 to 299 MBH input at 95.1% AFUE, 6.5:1 modulation, Modbus standard and cascade capacity up to 16 boilers.
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.
The Ideal Commodore Wall CB470W lists 470 MBH, against 299 MBH on the Ideal Commodore Wall CB299W, per the cited documentation.
The Ideal Commodore Wall CB470W carries the higher published efficiency at 95.6%, against 95.1%.
It ships at 198 lb against 184 lb for the Ideal Commodore Wall CB299W, 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.