About Us

Frank Thornton founded the business in 1973. Then Franks son Tim, after serving six years in the Marine Corp, acquired Thorntons Heating & Air Conditioning in 2008, and operated the business until 2026. In March of 2026 Gen-Con Group, a growing contractor in this region, acquired Thornton’s Heating Air Conditioning. Tim Thornton is still employed by Thorntons and plays an important role in its success. Thornton’s Heating and Air Conditioning was sought after due to its reputation and many years serving the community.

For over 50 years, Thornton’s Heating & Air Conditioning has been serving Graham, Elon, Mebane, Gibsonville, Burlington, Greensboro, Chapel Hill, Guilford County and surrounding areas of the Triad with full-service heating and air installation, maintenance, repair, sheet metal, commercial work, and direct sales of professional HVAC equipment. We offer FREE estimates on all new installations. We specialize in the installation and service of Rheem, Arco Aire, Tempstar, Goodman, and many others including Mitsubishi mini-splits.  

The goal of Thornton’s Heating and Air Conditioning is to build lifelong relationships, through trust, reliability and integrity. We want all our customers to have confidence they have a business which they can depend on, now and for the years to come. 


We stand behind every heating & air conditioning unit we install, and all of our work comes with a 100% satisfaction guarantee. When we install, repair or service your HVAC unit, you can trust the job is done right, we guarantee it.