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
The Utica UB90-150 (Series II) and Utica UB90-175 (Series II) are both condensing boilers in the Utica Boilers UB90-200 Series II (UB90-125 to UB90-200) line. The Utica UB90-150 (Series II) is rated 90% AFUE, and the Utica UB90-175 (Series II) is rated 90% AFUE. Both list the same published AFUE of 90%.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Utica UB90-150 (Series II) | Utica UB90-175 (Series II) |
|---|---|---|
| AFUE | 90 % | 90 % |
| Venting | Sealed combustion, direct vent; CPVC and PVC vent pipe | Sealed combustion, direct vent; CPVC and PVC vent pipe |
| Heat exchanger | Cast aluminum monoblock | Cast aluminum monoblock |
| Control | Fuel Smart Hydrostat — temperature limit, LWCO and boiler reset in one control | Fuel Smart Hydrostat — temperature limit, LWCO and boiler reset in one control |
| Warranty | Limited 15-year warranty | Limited 15-year warranty |
| Official status | 'Sorry, There are no current documents for this product!' | 'Sorry, There are no current documents for this product!' |
Published ratings: the Utica UB90-150 (Series II) is rated 90% AFUE; the Utica UB90-175 (Series II) is rated 90% AFUE. Both list the same published AFUE of 90%.
Both records print the same AFUE (90%), venting (Sealed combustion, direct vent; CPVC and PVC vent pipe), heat exchanger (Cast aluminum monoblock) and control (Fuel Smart Hydrostat — temperature limit, LWCO and boiler reset in one control), per the cited sources.
Utica Boilers
The Utica UB90-150 is the second of the four UB90-200 Series II sizes (150 MBH class) — a 90% AFUE condensing boiler on the cast aluminum monoblock heat exchanger with the Fuel Smart Hydrostat control. The UB90-200 Series II page prints no current documents, so this model is recorded as discontinued.
Utica Boilers
The Utica UB90-175 is the third of the four UB90-200 Series II sizes (175 MBH class) — a 90% AFUE condensing boiler on the cast aluminum monoblock heat exchanger with the Fuel Smart Hydrostat control. The UB90-200 Series II page prints no current documents, so this model is recorded as discontinued.
Both list the same AFUE of 90%.
Both list the same AFUE, venting, heat exchanger and control, 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.