Avenger FBDTP30 Tank top Heater, Metal 30, 000 Maximum BTU provides powerful outdoor heat in 6 Heat temperature settings Burner heads swivel up to 45 degrees for directional heating No electricity required! Hooks up in minutes - heats Up in seconds! Operates on threaded, refillable propane cylinders (not included) For outdoor use only; never use this appliance in an enclosed space