Don't judge it by its small stature, the Mr. Heater Portable Propane Convection Heater kicks out an outstanding 25k BTUs per hour, heating an area of up to 625 sq. ft. Perfect for your job site or your next remodeling project. This heater uses the natural act of warm air rising to heat your desired area. Simply hook the heater up to included hose and regulator and hook it up to a 20 lb. propane tank. Then use the Piezo igniter and enjoy the warmth. With the termo-electric safety valve, you'll never have to worry about gas continuing to flow after the flame goes out. This heater automatically shuts off the gas flow the moment the flame goes out. Keeping you safe and secured. This heater delivers the heat you expect from Mr. Heater, and so much more. 25,000 BTU per hour For use with propane gas Heats up to 625 sq.ft. Operates up to 17 hours on a 20-lb. propane tank (not included) Standing pilot for increased safety No electricity required Quiet and odorless Clean burning Dimensions 13 inch x 13 inchw. Weighs 3 lbs.