Comfort Systems USA, Inc. provides heating, ventilation and air conditioning installation, maintenance, repair and replacement services within the mechanical services industry. The Company has 38 operating units in 72 cities and 86 locations throughout the United States. The Company operates primarily in the commercial, industrial and institutional HVAC markets. In addition to standard HVAC services, it also provides specialized applications, such as building automation control systems, fire protection, process cooling, electronic monitoring and process piping. Certain locations also perform related activities, such as electrical service and plumbing. The company is publicly traded on the New York Stock Exchange under the symbol 'FIX'.