Ontario Refrigeration Service is a plumbing contracting firm that has been in business for more than 45 years. It offers heating, ventilation and air conditioning control solutions, as well as building lighting control and monitoring services. The company provides installation and replacement services for screw chillers, cooling towers, ductwork, air handlers and fans. Ontario Refrigeration Service has worked on projects, such as Elsinore Valley Municipal Water District, Fountain Valley, Mervyns and Albion Pacific/Security Building. It operates a controls department that offers building automation services. The company has also worked on controls projects that include University of La Verne, Elsinore Valley Municipal Water District, Omnitrans Rapid Transit, Inland Valley Daily Bulletin, Inland Empire Health Plan and Wescom Credit Union.