Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The UFT-175W and UFT-199W are the two largest UFT wall boilers and share the 19.7 x 37 x 16.8 in cabinet at 110 lb, the same 19,900 BTU/hr minimum fire and identical venting and connections. The 199 adds 24 MBH of input ceiling and 23 MBH of heating capacity (189 versus 166 MBH) and prints the line's only 96.0% DOE AFUE.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | HTP UFT-175W | HTP UFT-199W |
|---|---|---|
| Input rate, minimum (natural gas) | 19.9 MBH | 19.9 MBH |
| Input rate, maximum (natural gas) | 175 MBH | 199 MBH |
| DOE AFUE | 95.9 % | 96 % |
| Heating capacity | 166 MBH | 189 MBH |
| Turndown | 10:1 | 10:1 |
| Venting | 2" to 50 ft or 3" to 100 ft, combined equivalent feet | 2" to 50 ft or 3" to 100 ft, combined equivalent feet |
| Weight, wall-mount model | 110 lb | 110 lb |
| Dimensions, wall model (W x H x D) | 19.7" x 37" x 16.8" | 19.7" x 37" x 16.8" |
Both sizes occupy the wide UFT wall cabinet (19.7 x 37 x 16.8 in) at 110 lb, with floor siblings (UFT-175F / UFT-199F) at 140 lb in the 22 x 48 x 18 in floor frame. Both fire down to the same 19,900 BTU/hr minimum, so below the 175's ceiling day-to-day behaviour is identical.
The 199 raises the ceiling to 199,000 BTU/hr and heating capacity to 189 MBH against the 175's 175,000 BTU/hr and 166 MBH — the extra 24 MBH is pure design-day headroom. Its printed DOE AFUE of 96.0% is the highest in the UFT line and matches the 'up to 96% AFUE' claim on HTP's UFT page.
HTP's submittal notes the 175 MBH models modulate at 8.79:1; the 199's 19,900–199,000 BTU/hr range is the full 10:1 spread. Venting (2" to 50 ft, 3" to 100 ft), 1-1/4" NPT connections and the out-of-the-box 10-year residential warranty are identical on both.
HTP
The HTP UFT-175W is the 175 MBH class wall-mounted model of HTP's Universal Fire Tube (UFT) medium-mass condensing boiler line: 19.9 to 175 MBH natural-gas input, 95.9% DOE AFUE and 166 MBH heating capacity in a 110 lb wall cabinet.
HTP
The HTP UFT-199W is the 199 MBH class wall-mounted model of HTP's Universal Fire Tube (UFT) medium-mass condensing boiler line: 19.9 to 199 MBH natural-gas input, 96% DOE AFUE and 189 MBH heating capacity in a 110 lb wall cabinet.
Yes — both weigh 110 lb in the 19.7 x 37 x 16.8 in wall cabinet. Only the firing range and printed efficiency differ.
The UFT-199W at 96.0% DOE AFUE, the highest figure in the UFT table and the basis of the family's 'up to 96%' claim.
When the heat-loss calculation plus recovery load approaches the 175's 166 MBH heating capacity. Both fire down to 19,900 BTU/hr, so extra ceiling costs nothing in low-fire behaviour.
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 8, 2026. Last updated September 8, 2026. Technical reviewer: not yet assigned.