DC Thermal SD12-5000/3 12 Volt Ducted Heater 3 Vent 10,020 BTU's Heat and Defrost Adjustable Fan Speed Heater Dimensions: 9x 5 X 4 12 Volt, 50 Amps, 600 Watts Brushless 50,000 Hour Ball Bearing Fan 10,000 Hour DC Thermal RuCar Vacuum Sealed Elements.