Headquartered in Houston, Comfort Systems USA (Bristol) is one of the leading providers of heating, ventilation and air conditioning services in the United States. Its capabilities include maintenance, product design and development, installation, project management and engineering. The company offers energy-related services that include commissioning, economic analysis, energy planning and design assistance. It designs and offers cost-effective solutions to commercial, industrial and residential customers. In addition, Comfort Systems USA (Bristol) provides remote monitoring, customized invoicing and 24- hour repair services. The company s project contracting services feature detailed design and financing, project development and qualification and construction. Comfort Systems USA (Bristol) maintains a presence in Bristol, Va.