Established in 1962, Dependable Graham Air Conditioning Inc. is a full-service contractor based in Orange County, Calif. The firm provides a variety of services, such as tenant improvement, energy management, wireless communication, zoning, duct replacement as well as repair/replacement of heating, ventilation and air conditioning (HVAC) systems. In addition, it supports an in-house sheet metal design, fabrication and installation shop. The company caters to the residential and commercial sectors. Dependable Graham Air Conditioning Inc. is a member of the North American Technician Excellence (NATE), Newport Beach Chamber of Commerce and Better Business Bureau (BBB).