Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
Boilers.ca is a brand of ROMA Heating & Cooling · Licensed gas contractor LGA0202903
Comparison
Verdict in brief
Stepping from the UFT-100W to the UFT-120W raises the input ceiling from 100,000 to 120,000 BTU/hr and heating capacity from 95 to 114 MBH, and the printed DOE AFUE rises from 95.1% to 95.6% — the 120 is the highest-rated of the compact 80–140 group. The cost is 10 lb of wall weight (100 lb versus 90 lb), with the same cabinet footprint and venting.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | HTP UFT-100W | HTP UFT-120W |
|---|---|---|
| Input rate, minimum (natural gas) | 10 MBH | 12 MBH |
| Input rate, maximum (natural gas) | 100 MBH | 120 MBH |
| DOE AFUE | 95.1 % | 95.6 % |
| Heating capacity | 95 MBH | 114 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 | 90 lb | 100 lb |
| Dimensions, wall model (W x H x D) | 17.5" x 34" x 15.4" | 17.5" x 34" x 15.4" |
The UFT-100W and UFT-120W share the 17.5 x 34 x 15.4 in wall cabinet, the 10:1 turndown family claim, the 2"-to-50 ft / 3"-to-100 ft venting and the 1-1/4" NPT connections. The 120 model adds 20 MBH of input ceiling (120,000 against 100,000 BTU/hr) and carries 10 lb more wall-mounted mass at 100 lb.
Efficiency moves the other way from the 80-to-100 step: the UFT-120W prints 95.6% DOE AFUE against 95.1% for the UFT-100W, making it the most efficient of the 80–140 compact cabinet group even though it is larger. Its heating capacity prints at 114 MBH against 95 MBH.
Minimum fires differ modestly (12,000 against 10,000 BTU/hr), so neither model has a low-fire advantage worth sizing on. Both keep identical venting, water-pressure and warranty terms — the decision is purely the design-day heat loss.
HTP
The HTP UFT-100W is the 100 MBH class wall-mounted model of HTP's Universal Fire Tube (UFT) medium-mass condensing boiler line: 10 to 100 MBH natural-gas input, 95.1% DOE AFUE and 95 MBH heating capacity in a 90 lb wall cabinet.
HTP
The HTP UFT-120W is the 120 MBH class wall-mounted model of HTP's Universal Fire Tube (UFT) medium-mass condensing boiler line: 12 to 120 MBH natural-gas input, 95.6% DOE AFUE and 114 MBH heating capacity in a 100 lb wall cabinet.
Yes, on the printed figures: 95.6% DOE AFUE against 95.1%. Boilers.ca records each model's printed number rather than a family average.
Yes — both are the 17.5 x 34 x 15.4 in wall cabinet, but the 120's wall package weighs 100 lb against the 100's 90 lb.
A licensed heat-loss calculation settles it. The 120 only earns its place when the load genuinely needs more than the 100's 95 MBH of heating capacity.
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.