Williamson-Thermoflo GWC Series 2
GWC Series 2 Overview
The GWC Series 2 is a gas-fired hot-water condensing boiler reaching roughly 91% AFUE with direct venting. It pairs higher efficiency with a floor-standing design for homes upgrading from atmospheric chimney-vented units.
Up to 91% AFUE
Efficiency
Approx. 130,000 BTU output (140 size)
Max BTU
Up to 12 years
Warranty
Key Features
Best for
GWC Series 2 Model Lineup
Click to call for sizing help — we calculate heat-loss before recommending a model.
| Model | BTU Range | Efficiency | Best For |
|---|---|---|---|
| GWC-140 | Approx. 130,000 BTU output | 91.4% AFUE | Mid-size hydronic homes |
Services we provide on the GWC Series 2
All work done by licensed BC gas-fitters — TSBC-certified.
GWC Series 2 Installation
Permit, sizing, venting, gas, commissioning.
From $6,500
GWC Series 2 Repair
Error code diagnosis, parts, full repair.
From $189
GWC Series 2 Maintenance
Annual tune-up — required for warranty.
From $169
Emergency Service
Same-day & after-hours no-heat, leak, CO, gas-smell response.
Call 604-359-1081
GWC Series 2 Replacement
Upgrade an older unit. Rebate-eligible.
From $6,500
Warranty Service
Authorized warranty repairs for Williamson-Thermoflo.
Warranty-covered
Williamson-Thermoflo GWC Series 2 service across Greater Vancouver
Service the GWC Series 2 in every major Greater Vancouver city.
Book Williamson-Thermoflo GWC Series 2 service today
Same-day repair available · Free installation quotes · Licensed gas-fitters