"This Mr. Heater Hero Cordless Forced Air Propane Heater provides powerful, super-quiet heat with no cords to get in the way. Delivers 30,000 to 60,000 BTU yet stays cool to the touch and is 50 quieter than other forced air heaters. Igniter Electronic ignition, Thermostat Included No, Needs Direct Venting No, Clearance from Rear Wall in. 24, Dimensions L x W x H in. 11 x 20 x 15, Fuel Consumption gal./hr. 1.39 lbs./hr., Remote Included No, Clearance from Side Wall in. 24, Clearance from Corner in. 24, Blower Power Supply Volts, Amps 110, Category Type Forced air, Regulator Included Yes, BTU Output 60,000, Blower CFM 300, Heat Settings 2, Oxygen Depletion Sensor No, Blower Included Yes. New Quiet Burner technology makes heater 50 quieter than standard forced air heaters Great for jobsites, utility buildings, sporting events and more Built-in rechargeable battery runs up to 4 hours per charge and can be used while charging Runs for up to 7 hours on a 20-lb. tank not included Sturdy handle for easy transporting"