Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The Compass NC110C and NC150C are the two smaller floor-standing Compass combis: both 95% AFUE with the same connections and venting. The NC150C lifts space heating from 110 to 150 MBH and continuous DHW from 2.7 to 3.6 GPM at a 77°F rise, for 10 lb more cabinet weight and a minimum fire that rises from 11 to 15 MBH.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | NTI Compass NC110C | NTI Compass NC150C |
|---|---|---|
| Space-heating input, minimum | 11 MBH | 15 MBH |
| Space-heating input, maximum | 110 MBH | 150 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Turndown ratio | up to 10:1 | up to 10:1 |
| Weight | 194 lb | 204 lb |
| Max. equivalent vent length, 2" | 100 ft | 100 ft |
| Max. equivalent vent length, 3" | 150 ft | 150 ft |
| CH water connections | 1 1/4" NPT | 1 1/4" NPT |
| DHW connections | 3/4" NPT | 3/4" NPT |
| DHW capacity at 77°F rise | 2.7 GPM | 3.6 GPM |
| Domestic hot water | Integrated combi (DHW plate) in the appliance | Integrated combi (DHW plate) in the appliance |
Both combis share the Compass floor platform at 95% AFUE with an integrated DHW plate, 1 1/4" NPT CH connections, 3/4" NPT DHW connections and the same 2" (100 ft) / 3" (150 ft) venting terms. The NC110C heats at 11 to 110 MBH in the 194 lb cabinet; the NC150C heats at 15 to 150 MBH in the 204 lb cabinet.
NTI rates continuous DHW at 2.7 GPM for the 110C and 3.6 GPM for the 150C at a 77°F rise — the 150C delivers a third more hot water, which is the usual reason a household steps up within the Compass combi line.
The 150C's minimum fire of 15 MBH (against 11) is the efficiency-side cost, plus 10 lb of cabinet. For a BC household the decision is the DHW and heat-loss calculation: draws that exceed 2.7 GPM continuous, or loads above 110 MBH, justify the 150C; compact homes under both keep the lighter 110C.
NTI Boilers
The NTI Compass NC110C is the smallest floor-standing Compass combi: space heating at 11 to 110 MBH input plus 2.7 GPM continuous DHW at a 77°F rise, rated 95% AFUE in a 194 lb floor cabinet.
NTI Boilers
The NTI Compass NC150C is the mid-size floor-standing Compass combi: space heating from 15 to 150 MBH input plus 3.6 GPM continuous DHW at a 77°F rise, rated 95% AFUE in a 204 lb floor cabinet.
3.6 GPM continuous at a 77°F rise against 2.7 GPM on the NC110C, per NTI's Compass product page.
Both are floor-standing Compass cabinets; the NC150C weighs 204 lb against the NC110C's 194 lb, with the same connections and venting.
Size both sides: heating input from the heat-loss calculation, and DHW from the household's real draws against 2.7 or 3.6 GPM continuous at a 77°F rise.
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 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.