Comfort Systems USA, Inc. provides mechanical installation, renovation, maintenance, repair, and replacement services for the mechanical services industry in the United States. It is involved in the design, engineering, integration, installation, and start-up of mechanical and related systems; and maintenance, repair, replacement, renovation, expansion, reconfiguration, and monitoring of mechanical systems, including heating, ventilation, and air conditioning (HVAC) systems, as well as industrial process piping. The company provides its services for office buildings, retail centers, apartment complexes, and manufacturing plants; and healthcare, education, and government facilities. It serves building owners and developers, general contractors, architects, consulting engineers, and property managers in the commercial, industrial, and institutional HVAC markets. Comfort Systems USA, Inc. was founded in 1917 and is headquartered in Houston, Texas.