Comfort Systems USA (Carolinas) is a part of Comfort Systems USA, which is a heating, ventilation and air conditioning company. It is a group of 35,000 companies. Comfort Systems USA offers project development and qualification, detailed design, finance and postconstruction services. It provides a range of maintenance and repair services. Comfort Systems USA also offers net-accessible reporting on service call status and repair histories. It provides control systems design and optimization, design and build installation, systems integration, and Internet- and wide area network-based solutions. Comfort Systems USA offers construction management, commissioning, operator training, and remote monitoring and diagnostic services.