Enerco Mr. Heater MH18B Big Buddy Indoor/Outdoor Propane Heater [Misc.] 3 temperature settings: Hi, Med and Low Swivel regulators for easy installation of 1 lb propane cylinders 4,000, 9,000 and 18,000 BTU/hr - Heats up to approximately 400 sq ft Quick-connect assembly for hose assembly Accidental tip-over shutoff