Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The NTI Trinity TRX120 and Weil-McLain ECO Tec 110-H are both 95% AFUE heating-only condensing boilers in the 110-120 MBH input class for typical detached homes. The TRX120 fires 13.2 to 120 MBH at 88.6 lb with 1" male-sweat connections and claims up to 11:1 turndown, while the ECO Tec 110-H runs to 110 MBH at 104 lb with 1" connections and a documented 10:1 turndown. Heat-loss calculation decides which ceiling fits.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | NTI Trinity TRX120 | Weil-McLain ECO Tec 110-H |
|---|---|---|
| Input, maximum | 120 MBH | 110 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Turndown ratio | up to 11:1 | 10:1 |
| Weight | 88.6 lb | 104 lb |
| CH water connections | 1" male sweat with adapter | 1" NPT male |
| Gas connection | 3/4" NPT | 1/2" NPT male |
| Fuel | Natural gas or propane | Natural gas or propane |
Both are wall-hung, heating-only condensing boilers rated 95% AFUE on natural gas or propane, and both cover the typical detached home: NTI lists 13.2 to 120 MBH of input for the TRX120 while Weil-McLain documents a 110 MBH CSA maximum input for the ECO Tec 110-H with a 100 MBH DOE heating capacity. Homes whose calculated load lands between 110 and 120 MBH can use the NTI's extra reach; most homes will not.
Turndown and low-fire figures give each brand a talking point: the TRX120 claims up to 11:1 and starts at 13.2 MBH, while the ECO Tec 110-H documents 10:1 modulation from its 110 MBH ceiling. Both figures describe the same general idea — deep modulation through shoulder seasons — and neither replaces a heat-loss calculation when deciding whether a 120 MBH boiler is oversized for the house.
Weights and connections are close enough that the wall decides: the TRX120 weighs 88.6 lb with 1" male sweat connections (adapters) and 3/4" NPT gas, while the ECO Tec 110-H weighs 104 lb with 1" NPT male connections and 1/2" NPT male gas. Both are heating-only, needing an indirect tank for domestic hot water, and both vent in 2" or 3" plastic pipe per each maker's published limits.
NTI Boilers
The NTI Trinity TRX120 is the 95% AFUE heating-only TRX between the 85 and the 150: it fires 13.2 to 120 MBH at just 88.6 lb, keeping the lightest chassis class in the series with 2" venting to 100 ft or 3" to 150 ft.
Weil-McLain
The ECO Tec 110-H steps the heat-only line to 110 MBH input with 100 MBH DOE heating capacity at 95.0% AFUE, modulating 10:1 in the same 104 lb, 19 x 20 x 33 inch cabinet as the 80-H.
NTI claims up to 11:1 for the TRX120 and Weil-McLain documents 10:1 for the ECO Tec 110-H, with both claims stated on their product pages.
Close: the TRX120 uses 1" male sweat connections with adapters, while the ECO Tec 110-H uses 1" NPT male connections.
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.