This portable radiant heater is like reflective radiant heat with the warmth of the sun. The 35,000 BTU portable liquid propane heater requires no electricity and is whisper quiet. With factory installed features like a tip-over safety switch and a thermoelectric safety valve, the only thing you need to heat up to 875 sq. ft. is a 20lb propane tank. Just hook the tank up to the supplied 10ft hose and regulator, then enjoy the comfortable quiet warmth.