ACCO Engineered Systems doesn't break a sweat to keep you cool. The company provides design, construction, and maintenance of mechanical systems, including heating, ventilation, air-conditioning, refrigeration, piping, plumbing, engineering, and building controls. The employee-owned business has performed work in nearly 20 US states and Mexico, with operations mainly on the West Coast. Subsidiary Sunbelt Controls installs automated building systems in California, Washington, and Nevada. ACCO's projects include office buildings, malls, hospitals, hotels, clean rooms, factories, theaters, stadiums, and more. Clients include the likes of Boeing, Disney, Microsoft, Sun Microsystems, Universal Studios, and the government.