Stan Roller & Associates, 867 Lilac Ln, Naperville, IL 60540, US

Founded in 1970, Westside Mechanical is one of Illinois' leading HVAC systems and service contractors. The company has designed, installed and serviced thousands of HVAC systems utilizing a full range of manufacturers, technologies, and HVAC applications and systems. The company s in-house design resources include design/build engineering services, Sheet Metal and Air Conditioning Contractors National Association-certified sheet metal fabrication, automated building controls, customized 24-hour maintenance programs, and energy management and indoor air quality analysis services. Westside has design and installation expertise in commercial buildings, industrial facilities, health care facilities, engine test facilities, churches, computer rooms, laboratories, institutional facilities and clean rooms. Westside Mechanical maintains its corporate offices and a 40,000-square-foot working laboratory in Naperville, Ill., and has a branch location in Arlington Heights, Ill.