Established in 1928, Rossoe Energy Systems is a locally owned oil heating company that provides heating equipment and related products for residential and commercial properties. Its products include bio diesel, fuel economizers, tankless water heaters, humidifiers, and air filters and cleaners. The company additionally provides hot water boilers, air conditioners, thermostats, heat pumps, and gas and oil furnaces. It offers installation, repair, maintenance, inspection, certification, oil delivery and 24-hour emergency services. The company supplies a variety of products from various manufacturers, such as Enviracaire, Accu, American Standard, Thermo Pride, Tempstar and Olsen. It is a member of the Pacific Northwest Oil Heat Council. Rossoe Energy Systems is located in Seattle.