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American-built cast-iron and condensing boilers · ~$5,500–$9,100 installed · 3 series · 7 models · 604-359-1081

$5,500–$9,100approximate installed price

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 Williamson-Thermoflo quote

Williamson-Thermoflo manufactures gas-fired residential boilers in the United States, spanning traditional cast-iron water and steam units to modern wall-mounted stainless-steel condensing models. The lineup covers atmospheric cast-iron designs for chimney-vented homes as well as high-efficiency FreeStyle condensing boilers available in heat-only and combi configurations.

Made in the USA with factory-tested assemblies

Cast-iron sections backed by a limited 10-year section warranty

FreeStyle condensing line reaches 95% AFUE

Modulating combustion with up to 10-to-1 turndown on condensing models

Both natural gas and propane firing available

Heat-only and combi options for hot-water and combined DHW needs

Williamson-Thermoflo Series & Models

FreeStyle Series 2

Wall-mounted 95% AFUE condensing boiler, heat-only or combi

Combi (heat + hot water)Up to 95% AFUE3 models

$6,500–$9,100

installed

GWC Series 2

High-efficiency cast-aluminum hot-water condensing boiler

CondensingUp to 91% AFUE1 models

$6,500–$9,100

installed

GWA Series 3

Durable atmospheric cast-iron hot-water boiler

Cast-ironUp to 84% AFUE3 models

$5,500–$7,700

installed

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.

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604-359-1081 · We supply & install — approximate prices shown, call for your exact number.

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