The BuddyFLEX Heater features 11,000 BTU omni-directional radiant heat with high wind resistance technology. The heater has infinitely variable output control for efficient fuel consumption (8000-11,000 BTU). Patented overheat safety shut down technology. Integrated heater and accessory controls. Integrated accessory safety shut-off and quick connect gas and accessory system. Safety features include: Emergency Low Oxygen Safety System, Apex 50 Tip-Switch, Thermal Shut-Down System (TSS). Heats up to 275 Sq. Ft. and runs up to two hours on high, 3-1/2 hours on low. Runs on 1 Lb. cylinder or 20 Lb. tank with hose (not included).