HACI was founded in 1972 as Home Air Conditioning, Inc., specializing in converting residences from evaporative cooling to refrigerated air conditioning. Over the years our focus has shifted, and by 1980 we had moved to commercial work and away from residential work. We changed our name to HACI Mechanical Contractors, Inc. to more accurately reflect what we do now, but to honor our past, we retain HACI as part of our corporate name. HACI Service, LLC was added to provide better service to smaller construction projects, TIs, and retrofits. HACI has grown to be one of the largest private, locally-owned commercial Mechanical Contractors in Arizona.