Established in 1942, Chas Roberts Air Conditioning offers a variety of residential heating, ventilating and air conditioning equipment. The company operates a service department that has Puron-certified technicians. Its manufacturers include Carrier, Goodman, Honeywell, Bryant, York and Trane. Its products include air conditioners, thermostats, air filters, heaters, humidifiers, heat pumps, ventilators, coils, zoning systems and piping components. It offers electrical components, including fuses, contactors, capacitors, defrost controls, gas valves, fan motors, compressors and furnace circuit boards. It also provides agreements and extended warranty packages. Chas Roberts Air Conditioning operates various branches in Tucson, Ariz., and Phoenix.