Duraheat, 360 Degree LP Tank Top Heater, Small & Portable Design With Variable BTU Setting Of 30,000, 35,000 & 40,000, Heats Up To 1,000 SQFT With High Efficiency Stainless Steel Heat Reflectors, Rust Proof Chrome Emitter Guard, Mercury Free Tip Over Safety Switch, Safety Shut Off Valve Stops Gas Flow If Flame Is Extinguished, 20 LB Run Time: 14.4 Hour At 30,000 BTU's, 12.4 Hour At 35,000 BTU's, 10.8 Hours At 40,000 BTU's, Quick Connect POL Tank Connection, CSA Certified.