RV Electric Add-on Suburban NT12 thru 20 "Ductless" Ductless Add-on Electric Heater for Suburban NT12 thru 20 Funaace 1950 Watt 120 VAC 16.5 amps CheapHeat Integrated Controller & Change Over Switch Wire Harnesses, Misc. Mounting Hardware, Wire Clamps Installation and Safety Manual