Propane heater requires no electricity. Circular design projects heat 360 Deg. Adjustable output from 75,000 to 200,000 BTU (British Thermal Unit) per hour. Operates up to 29 hours on a 100 Lb. (pound) propane tank. Standing pilot for increased safety. Insta-lock chamber for easy assembly. Clean burning, quiet operation. Includes 10 Ft. hose and regulator. Fully assembled and ready to use. Cylinder sold separately. 2 to 29 hour run time. Check state and local codes for permitted uses.