For Use With Liquid Propane. Heats Up To 500 Sq Feet. Blue Flame Burner For Even Convection Heat. Thermostat For Automatic Temp Control. Automatic Low Oxygen Shut-Off System.Legs & Wall Mounting Hardware Included. The item "BF20LPVF Mr Heater 20,000 BTU Vent Free Blue Flame Propane Heater Factory Servi" is in sale since Monday, November 1, 2021. This item is in the category "Home & Garden\Home Improvement\Heating, Cooling & Air\Heating & Cooling Appliances\Space Heaters". The seller is "toolmartinc" and is located in Golden, Mississippi. This item can be shipped to United States.