Adjustable from 35 to 60,000 BTU output. Heats up to 1500 sq. ft. and operates approximately 7 to 14 hours on a single 20 lb. cylinder (gas grill cylinder). Requires a 110/120V grounded outlet for proper operation. Hose and regulator included for use on 20 - 100 lb. cylinders. Clean burning, portable LP forced air heaters are ideal for indoor or outdoor heating needs around the home and on the job. Use only in well ventilated areas, not intended for indoor use in air tight facilities. Portable, lightweight design is perfect for drywalling, painting, concrete curing, and worker comfort. Simple-to-use design features continuous spark ignition, adjustable heating angle, and fold down carrying handle. Built-in safety system shuts down heater if electricity or fuel systems are interrupted. High capacity fan operates on standard 110/120V power source. Cylinders sold separately. Check state and local codes for permitted uses.