Mr. Heater 80,000 BTU industrial convection propane heater provides big heat right out of the box. Utilizing the natural act of warm air rising, it packs a big punch in a small package, quickly heating up to 2,000 sq.ft., Its thermo-electric safety shut-off valve cuts the gas flow off if the flame ever goes out, giving you piece of mind so you can focus on the task at hand. Includes a 10 ft. hose, regulator and a built-in piezo igniter with no electricity or matches required. All you need is a minimum 20 lbs. propane tank connection to enjoy the comforts of a toasty warm job site.