- Energy Efficient Options
American Window Company is a window and door supplier that provides replacement and installation services to clients in Ontario and the surrounding areas. In addition to offering a wide variety of window products made of materials ranging from vinyl and fiberglass to aluminum and wood, it also installs patio doors and window coverings. The company carries products from brands such as Windsor, Milgard, and Simonton. Moreover, American Window Company has been serving builders, homeowners, and general contractors since 1999.