About Williamson

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.

The Williamson® Story

The Williamson story begins in 1882 with the founding of Bennett Furnace Company in Cincinnati. Around 1890 the company changed its name to the Bennett & Peck Company and then to Peck and Williamson Heating and Ventilating Company. In 1911, Peck and Williamson bought several other heating equipment businesses to form the Williamson Heater Company.

The Williamson Heater Company combined the expertise of these firms to establish an extremely strong presence in the heating and air conditioning industry. The company’s boilers, furnaces and other products were routinely cited for their reliability and durability.

In spring 1992, Metzger Machine Corporation acquired the assets of The Williamson Company, and began producing the Williamson line in its Milwaukee, Wisconsin plant. Metzger had already established a reputation in the HVAC industry with its Milwaukee Thermoflo line of heating and air conditioning equipment.

A New Beginning

In December 1999 another well-established heating equipment company, The Marley-Wylain Company, acquired the brand names Williamson and Thermoflo, from Metzger.

Today, Williamson-Thermoflo operates as an independent business unit of The Marley-Wylain Company.