The Mr. Heater F299731 Vent-Free 30,000 BTU Natural Gas Blue Flame Heater is your perfect supplemental heating solution. This blue flame heater comes equipped with on-board thermostat for superior temperature control. with battery powered electronic ignition and mounting feet and hardware included, starting and installing the natural gas heater is a breeze. Mr. Heater vent free heaters can be permanently mounted to the wall or securely fastened to the floor with included hardware. Featuring a clean burning blue flame tube, the natural gas heater uses natural convection properties to circulate warm, comfortable air. with factory installed Low Oxygen Safety System, you can be confident and comfortable for years to come.