Williamson-Thermoflo

Williamson-Thermoflo brings you over a century of experience with high-quality comfort products. You can count on Williamson and Thermoflo brand heating products to meet your comfort needs. Williamson-Thermoflo offers a full line of oil furnaces, cast iron boilers and tankless (indirect-fired) water heaters. Each product is backed by a tradition of excellence and our solid warranty.
Williamson and Thermoflo are two highly recognized brand names that formed a partnership in December, 1999 as the new Williamson-Thermoflo Company. While these two veteran names enjoy a proud and lengthy history, the partnership begins a new and exciting chapter in the growth of the company.
The Williamson-Thermoflo company offers products and services in the tradition and quality customers have come to expect. Williamson-Thermoflo, a company on the move, hopes to enhance the strong foundation established by these two historically strong brand names by blending their best qualities into one outstanding company.

Established in 1890, Williamson quickly developed into a highly regarded manufacturer of heating and cooling equipment.

Developed in 1946, the Thermoflo line of residential furnaces quickly established itself as a provider of high quality and durable equipment. Since its inception, the Thermoflo line has met with continuous growth and made several additions to the Thermoflo product line.

Williamson-Thermoflo is committed to providing you with quality products, competitive pricing, friendly service, prompt delivery and factory support.

Williamson-Thermoflo
8201 West Calumet Road • Milwaukee, WI 53223 • USA
Phone: 800.736.BEST(2378) • Fax: 414.354.2623