This thermostat controlled LP fired heater works like the furnace in your home to heat enclosed spaces. Just set the included thermostat to the temperature you want and it will cycle off and on to maintain that temperature. Come with 100 lb LP tank, flexible hose with regulator and thermostat. The LP tank is delivered full and you are billed for the amount of gas used. Will maintain a 30 degree temperature rise in enclosed spaces up to 2,000 sq ft. Electricity required for operation. Heater may be placed inside the tent or outside with optional diffuser.