Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
Both sizes sit on the same ClearFire-W platform. The CFW 1500 raises the minimum gas pressure requirement from 7 to 10 in w.c. and steps water capacity from 164 to 176 gal.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Cleaver-Brooks ClearFire-W CFW 1000 | Cleaver-Brooks ClearFire-W CFW 1500 |
|---|---|---|
| Efficiency (manual) | 88 % | 88 % |
| Water content | 164 gal | 176 gal |
| Minimum gas pressure at gas train connection | 7 in w.c. | 10 in w.c. |
| MAWP | 125 psig | 125 psig |
The CFW 1000 carries 88% efficiency and the CFW 1500 88%. Both sizes sit on the same ClearFire-W platform. The CFW 1500 raises the minimum gas pressure requirement from 7 to 10 in w.c. and steps water capacity from 164 to 176 gal.
Water content moves from 164 gal to 176 gal, which changes the system volume and buffer behaviour. Pressure rating: 125 on the smaller unit against 125 on the larger.
Both models are documented in the same official Cleaver-Brooks material, so the choice is a load and plant-layout decision: size to the calculated demand, then verify connections, venting and weight in the family document for the exact model.
Cleaver-Brooks
The Cleaver-Brooks ClearFire-W CFW 1000 is a compact vertically fired firetube hydronic boiler documented by the official Model CFW O&M manual (750-296), with 164 gal water capacity and a 7 in w.c. minimum gas pressure.
Cleaver-Brooks
The Cleaver-Brooks ClearFire-W CFW 1500 is a compact vertically fired firetube hydronic boiler documented by the official Model CFW O&M manual (750-296), with 176 gal water capacity and a 10 in w.c. minimum gas pressure.
Yes — Table 2-3 prints a 7 in w.c. minimum for the 1000 and 10 in w.c. for the 1500, against a 28 in w.c. maximum across the line.
Both are built to a 125 psig MAWP under the ASME low-pressure Section IV hot water code, operating below 112 psig.
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.