Force10 11 gallon capacity, 110 volts. Corrosion-resistant heater with aluminum housing and stainless steel casing. A 7/8-inch heat exchanger with 1/2-inch NPT thread ensures easy installation. Heat control is more efficient through increased surface area. Comes complete with ignition-protected controls, high temperature, and high pressure valve installed. Measures 16-inches wide (mounting feet not included, w/feet is 18-inches) x 22-inches depth x 16-inch height.