Williamson-Thermoflo FS-120 (Combi)
Mid-size homes needing heat plus hot water · ~$6,500–$9,100 installed · 95% AFUE · 604-359-1081
From the Williamson-Thermoflo FreeStyle Series 2 range. We supply & install — we do not sell equipment on its own. Every GasBoilers.ca price includes professional installation by Red Seal–certified BC gas-fitters, permit, and commissioning.
604-359-1081 — exact FS-120 (Combi) quoteThe Williamson-Thermoflo FS-120 (Combi) is part of the FreeStyle Series 2 — wall-mounted 95% afue condensing boiler, heat-only or combi. The FreeStyle Series 2 is a wall-mounted gas-fired condensing boiler with a stainless-steel heat exchanger and modulating combustion rated at 95% AFUE. It is offered in heat-only and combination (combi) versions across three input sizes, with flexible PVC, CPVC, PP or stainless venting.
FS-120 (Combi) Specifications
Heating output
120,000 BTU input BTU
Hot water
Combi DHW model
Efficiency
95% AFUE
Warranty
Up to 12 years
Best suited to: Mid-size homes needing heat plus hot water.
What the Installed Price Includes
Approximate installed price — every home is different. Final cost depends on your existing system, venting, gas line, and a heat-loss calculation. Call 604-359-1081 for an exact quote.
Other FreeStyle Series 2 models
Williamson-Thermoflo FS-120 (Combi) — installed in your city
More on the Williamson-Thermoflo FS-120 (Combi)
Get an exact Williamson-Thermoflo FS-120 (Combi) installed quote
604-359-1081 · We supply & install — approximate price shown, call for your exact number.