Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The NTI Trinity TFTN150 and Weil-McLain ECO Tec 150-H are both 95% AFUE heating-only condensing boilers at 150 MBH maximum input, sized for larger detached homes. NTI's wall-hung unit weighs 122 lb with water on 1 1/4" connections and allows 2" or 3" venting, while the ECO Tec 150-H is a 117 lb wall-hung boiler with 1" connections and 100-foot 2" or 3" vent runs. A heat-loss calculation picks the size; the vent route picks the brand.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | NTI Trinity TFTN150 | Weil-McLain ECO Tec 150-H |
|---|---|---|
| Input, maximum | 150 MBH | 150 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Weight | 122 lb | 117 lb |
| CH water connections | 1 1/4" NPT | 1" NPT male |
| Gas connection | 3/4" NPT | 1/2" NPT male |
| Fuel | Natural gas or propane | Natural gas or propane |
Both boilers sit at a 150 MBH maximum input (NTI lists 15 to 150 MBH) and both carry a 95% AFUE rating for natural gas or propane heating-only service, so they compete for the same larger-detached-home loads. Neither record publishes the other brand's full low-fire figure in the shared format, but the ECO Tec line documents a 10:1 turndown claim on its Canadian page while NTI's own marketing claims remain the source for its modulation figures.
Weights and connections differ in ways that matter on site: the TFTN150 weighs 122 lb with water and uses 1 1/4" NPT male heating connections with 3/4" NPT gas, while the ECO Tec 150-H weighs 117 lb with 1" NPT male connections and 1/2" NPT male gas. Near-boiler piping on the NTI therefore starts one size larger, which can affect an existing-pipe retrofit.
Venting is where records diverge most: NTI allows 2" to 100 feet or 3" to 150 feet per side on the TFTN150, while Weil-McLain documents 100 feet in 2" or 3" (vent and air each) on the ECO Tec, with ULC S636 compliance noted for Canadian plastic venting. Both are heating-only boilers needing an indirect tank for hot water, and both should be matched to a room-by-room heat-loss calculation.
NTI Boilers
The NTI Trinity TFTN150 is the 95% AFUE wall-hung TFTN for mid-to-larger homes: 15 to 150 MBH input, 122 lb with water, on 1 1/4" NPT CH connections with 2" venting to 100 ft or 3" to 150 ft.
Weil-McLain
The ECO Tec 150-H is the first ECO Tec size to grow the heat exchanger: 150 MBH input, 139 MBH DOE heating capacity and a 121 MBH net AHRI rating at 95.0% AFUE, in a 117 lb unit with 3.1 gallons of water content.
The NTI TFTN150 steps up to 1 1/4" NPT male connections, while the Weil-McLain ECO Tec 150-H uses 1" NPT male connections.
Yes. NTI allows 100 feet of 2" per side on the TFTN150 and Weil-McLain documents 100 feet in 2" or 3" on the ECO Tec 150-H.
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.