Force10 6 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 13.625-inch wide (mounting feet not included, w/feet is 15.5-inch) x 19-inch depth x 13.5-inch height.