Mr. Heater Vent Free Blower Fan Kit for 20K and 30K UnitsThis unit can only be added to the Mr. Heater 20,000 and 30,000 BTU heaters made in 2016 and current models. The electrical cord that is connected to the fan assembly can then be plugged into a wall outlet and the three position rocker switch for the fan can be set for either off all the time, the middle position, On all the time, the top position, and the Automatic, bottom position, which allows the fan to turn on and off with the heat from the Vent Free unit as it operates. This switch can be reached even when the heater is mounted to the wall.Mr. Heater Vent Free Blue Flame Natural Gas Heater (No Blower/20,000 BTU/Hr)From its original tank tops to its patented buddy heaters, millions of consumers have enjoyed high-quality comfortable heat. Mr. Heater adds the 20,000 BTU/Hr Blue Flame Heater to its collection.Portable Heating SolutionThis Blue Flame 20,000 BTU Natural Gas Vent-Free Heater is the perfect supplemental heating solution even on the coldest days. This heater is conveniently equipped with a thermostat for superior control of the temperature in your space. Also, with a battery-powered electronic ignition, starting it is a breeze - battery included.*Note: Blower and Glass Sheild are not includedBundle Includes:Mr. Heater Vent Free Blower Fan Kit for 20K and 30K UnitsMr. Heater Vent Free Blue Flame Natural Gas Heater (No Blower/20,000 BTU/Hr)