Description 6,000 - 11,000 BTUHeats up to 275 sq. ft.Runs up to 2 hours on high 3.5 hours on lowIndoor safe Multiple patents pending Integrated electronic ignition Omni-directional fiber mesh burner Thermal shut-down system (patented) High wind resistance technology Infinitely variable output control for efficient fuel consumption (6,000 â 11,000 BTU) Integrated heater & accessory controls Integrated accessory safety shut-off Quick-connect gas & accessory system Runs on 1 lb. cylinder or 20 lb. tank with hose