Dynaglo Delux Professional Grade Portable Forced Air Heater Allows 125,000 BTUs and heats up to 3,100 sq. ft. Variable heat - 70,000 to 125,000 BTU's. Adjustable heat angle Continuous electronic ignition and over-heat auto shut-off protection Includes 10 ft. hose and regulator. Sturdy, rugged construction and easy lift carrying handle Runtimes for a 20 lb. tank: 6 hrs. at 70K, 4.5 hrs. at 100K