Extend the season at camp or on the patio, with the Century Double Head Propane Infrared Heater. Use one burner or two, for flexible heat output. Easily connects to your bulk propane tank tank not included. Pressure regulated 18,000 to 20,000 BTU with both burners on 9,000 to 14,000 BTU with one burner on. Regulator valve for efficient fuel flow in cold weather and at high altitude. Unique 4 screen design makes heater windproof. Safety shutoff valve automatically cuts gas flow if burner flame is extinguished. Connects easily to 20 lb. bulk tanks tank not included.