Comfort Systems USA alters ambient air automatically. The company sells and services commercial HVAC (heating, ventilation, and air conditioning) systems in apartments, health care facilities, office buildings, manufacturing plants, retail centers, and schools. In addition to HVAC services, Comfort Systems designs building automation control systems that integrate, monitor, and operate HVAC, lighting, and access control systems. Some company locations also offer fire protection, plumbing, and electrical services. Comfort Systems was established in 1997.