Heavy-duty variable heat output design built for the jobsite! This Mr. Heater 50-85,000 BTU Liquid Propane Forced Air Heater comes with a standard 10' hose and regulator and new for 2014 we included the patented, Quiet Burner Technology. Along with all of the safety you would expect of a Mr. Heater product. This unit can heat areas up tp 2,125 sq ft. Equipped with a factory installed High limit switch and thermoelectric safety valve you can feel comfortable using this heater on any jobsite and now you can do it 50% quieter. Just plug the heater into a 110v outlet hook up the included hose and regulator to a 20lb propane tank or larger and you are ready to take the chill out of any job!