Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The ECO Tec 110-C and 150-C are the two smaller ECO Tec combis with identical AFUE, turndown and cabinet: 95.0% AFUE at 10:1 in the 19 x 20 x 33 in frame. The 150-C fires to 150 MBH against 110 MBH and weighs 126 lb against 114 lb, which buys more DHW and heating headroom.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Weil-McLain ECO Tec 110-C | Weil-McLain ECO Tec 150-C |
|---|---|---|
| Input, maximum | 110 MBH | 150 MBH |
| DOE heating capacity | 100 MBH | 139 MBH |
| Net AHRI water rating | 87 MBH | 121 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Turndown | 10:1 | 10:1 |
| Weight | 114 lb | 126 lb |
| Boiler water content | 2.2 gal | 3.1 gal |
| Venting | 2" or 3" PVC, CPVC, polypropylene or AL29-4C stainless steel (Category IV) | 2" or 3" PVC, CPVC, polypropylene or AL29-4C stainless steel (Category IV) |
| Domestic hot water | Integrated combi: built-in DHW module with brazed plate heat exchanger | Integrated combi: built-in DHW module with brazed plate heat exchanger |
Both combis pair ECO Tec's stainless steel firetube heating section with a brazed plate DHW module, rated 95.0% AFUE with 10:1 modulation in the same 19 x 20 x 33 inch cabinet. Heating figures step from 110 MBH input / 100 MBH DOE capacity on the 110-C to 150 MBH / 139 MBH on the 150-C.
Because the DHW module draws on the same firing range, the larger 150-C carries more hot-water headroom during heavy draws, and its 121 MBH net AHRI rating against 87 MBH marks the heating step. The physical difference is 12 lb — 126 lb against 114 lb — and 0.9 gallons more boiler water.
Venting is identical: 2" or 3" Category IV pipe to 100 equivalent feet, with the full allowance in both sizes. The choice follows the heat-loss calculation plus the household's simultaneous hot-water demand, not floor area.
Weil-McLain
The ECO Tec 110-C is the entry combi of the Canadian ECO Tec line: the 110 MBH heat-only platform plus an integrated brazed plate DHW module for on-demand hot water, rated 95.0% AFUE at 114 lb.
Weil-McLain
The ECO Tec 150-C is the mid-size ECO Tec combi: 150 MBH of heating input plus an integrated brazed plate DHW module at 95.0% AFUE, weighing 126 lb with 3.1 gallons of boiler water.
The cabinet is the same 19 x 20 x 33 inches, but the 150-C weighs 126 lb against 114 lb and holds 3.1 gallons against 2.2 gallons of boiler water.
The 150-C: its larger firing range powers the DHW module during heavy draws. Weil-McLain publishes DHW flow as up to 5.4 GPM at a 70°F rise for the largest ECO Tec combi (the 199-C).
95.0% AFUE at 10:1 turndown, per the boiler manual ratings and the CA product page.
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.