Williamson is a leading name among heating and air conditioning brands. Our products have earned a reputation for long-lasting, reliable performance.

We are part of Williamson-Thermoflo®, a company with over 100 years of experience in the HVAC industry.

Our product line includes energy-efficient oil- and gas-fired cast iron boilers, oil and gas furnaces, indirect-fired water heaters, air conditioners and air handlers.

Williamson products are available through authorized plumbing, heating and HVAC distributors.

Service is offered through licensed plumbers, professional HVAC contractors, oil dealers and installers.