Uses Propane and is perfect for workshops, greenhouses, farms, warehouses, and events. ***Two 25' ducts included***. ***100% clean heat, flame never touches heated air. *** Indirect heaters work the same as a home furnace using a heat exchanger to heat the air. For Maximum heat and efficeincy, use two ducts, one to deliver hot air and one to return air from the heated space to the heater. Heating heated air instead of drawing in cold air from the outside greatly increases effectiveness all without fumes or smell.

With it's clean look, quiet operation and fuel efficient indirect-fired design, this Frost-Fighter IDH200QR LP/NG heater delivers safe, dependable heating and air circulation for any event. Set up the required amount of propane tanks (rented seperately) outside and route the included 15' propane hose to the heater. Temperature is controlled with included thermostate.