Mr. Heater certified dual fuel vent free heaters are your perfect supplemental heating solution. This blue flame 20,000 BTU heater comes with integrated electronic ignition and on-board thermostat for superior temperature control. With mounting feet and wall mount hardware included, installing and starting the unit is a breeze. Mr. Heater provides peace-of-mind with a patented, two-step fuel connection process to eliminate wrong-fuel hook-up. Featuring a clean burning blue flame tube, the heater uses natural convection properties to circulate warm, comfortable air. With factory installed dual, Low Oxygen Safety System, you can be confident and comfortable for years to come.