• 22,000 BTU per hour_x000d_ • For use with propane_x000d_ • Heats up to 500-600 sq. ft._x000d_ • For use in buildings with 7 to 8 ft ceilings_x000d_ • Efficient infrared heat that directly heats people and objects which in turn heats surrounding air to desired temperature_x000d_ • Includes adjustable thermostat for individually controlled warmth and all necessary brackets and hardware_x000d_ • No electricity required_x000d_ • Easy to install_x000d_ • No moving parts to service_x000d_ • Quiet, clean, odor-free operation_x000d_ • Non-corrosive materials used throughout construction