Founded in 1931, Airtherm is a manufacturing company of heating, ventilation and air conditioning products. Its products include vertical and horizontal room fan coil units, flooring, wall and ceiling unit heaters and air delivery models. In addition, the company provides convector heating products. It works on hotels, apartments, hospitals, office and institutional buildings, schools and universities projects. The company is a subsidiary of Mestek, which is a family of more than 30 manufacturing companies that provide heating, ventilation and air conditioning products, coil handling, metal forming and manufacturing equipment. Headquartered in Sunset Hills, Mo., Airtherm maintains a location in Forrest City, Ariz.