Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Weil-McLain · Series
The Simplicity is Weil-McLain's newest Canadian residential boiler — a condensing stainless steel firetube combi that can be configured as a combi or heat-only unit, in three sizes (110, 150, 199 MBH) rated 95% AFUE with text-fault touchscreen control.
Series facts
95% AFUE across the three Simplicity sizes per the boiler manual, brochure and CA product page.
The Simplicity is a high-efficiency condensing boiler that the CA product page describes as able to operate as a heat-only or as a combi unit: every model carries a stainless steel firetube heat exchanger plus a DHW brazed plate heat exchanger, a built-in circulator and a 10:1 turndown blower, so the same appliance can run pure heating now and switch to combi duty later when a water heater is retired.
Three sizes — Simplicity 110-C, 150-C and 199-C — fire at 110, 150 and 199 MBH input with 95% AFUE, and the brochure publishes DHW flow of 2.9, 4.0 and 5.3 GPM at a 70°F rise respectively. The 110 and 150 share a 16" x 20" x 34" cabinet and 3/4" heating connections; the 199 grows to 20" x 20" x 34" with 1" heating connections and 3/4" DHW connections.
Venting is 2" or 3" Category IV pipe to 100 equivalent feet (50 feet in 2" on the 199), and the control is a text-based colour touchscreen with a setup wizard — the brochure emphasizes "text-based control — no codes to figure out." The CA page's up-to-95% AFUE claim matches the manual ratings, and the boiler is Bluetooth-ready for the Weil-McLain ProTools app.
Highlights
Residential: 10-year primary heat exchanger / 2-year parts (5-year parts when registered); commercial: 8-year heat exchanger / 1-year parts, per the CA page and brochure.
Models
One canonical page per model with input, output and efficiency kept separate.
Weil-McLain
The Simplicity 110-C is the smallest Simplicity: 110 MBH input, 100 MBH DOE heating capacity and 95% AFUE in a 16 x 20 x 34 inch combi that runs as a combi or heat-only boiler.
Weil-McLain
The Simplicity 150-C is the mid-size Simplicity: 150 MBH input, 139 MBH DOE heating capacity and 95% AFUE with 4.0 GPM of DHW at a 70°F rise in the same 16-inch cabinet.
Weil-McLain
The Simplicity 199-C is the largest Simplicity: 199 MBH input, 184 MBH DOE heating capacity and 95% AFUE with the line's top DHW flow of 5.3 GPM at a 70°F rise.
| Specification | Weil-McLain Simplicity 110-C | Weil-McLain Simplicity 150-C | Weil-McLain Simplicity 199-C |
|---|---|---|---|
| input-min | — | — | — |
| Input, maximum | 110 MBH | 150 MBH | 199 MBH |
| DOE heating capacity | 100 MBH | 139 MBH | 184 MBH |
| Efficiency (AFUE) | 95 % | 95 % | 95 % |
| Turndown | 10:1 | 10:1 | 10:1 |
| vent-max-3 | — | — | — |
| vent-max-2 | — | — | — |
| Weight | 96 lb | 105 lb | 122 lb |
Read the full comparison: Weil-McLain Simplicity 110-C vs 150-C →
Read the full comparison: Weil-McLain Simplicity 150-C vs 199-C →
Read the full comparison: Weil-McLain Simplicity 110-C vs Simplicity 199-C →
Error codes and alerts
Manuals
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Services for Weil-McLain boilers
It can be either. Every Simplicity model includes a DHW brazed plate heat exchanger and can run as a combi for heat plus hot water, or as a heat-only boiler with hot water handled separately — the CA page markets exactly that flexibility.
Three sizes: 110-C, 150-C and 199-C at 110, 150 and 199 MBH input, all rated 95% AFUE with published DHW flow of 2.9, 4.0 and 5.3 GPM at a 70°F rise.
The Simplicity's colour touchscreen shows text fault names and messages — the brochure states "text-based control — no codes to figure out." The boiler manual documents the fault list and corrective actions.
Describe what the boiler is doing and get a straight answer about the next step.
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.