DESC: Reddy Heater 50,000 - 85,000 BTU Variable Output Propane Forced Air Pro Tough Series. TB114. Reddy Heater Forced Air heaters are equipped with an electrically operated fan which forces air from the combustion chamber and circulates it throughout the working area. They’re lightweight, compact, and ideal for construction, small trade, agriculture, automotive, and do-it-yourself projects. Clean-burning, odor-free fuel leaves no residue on surfaces. These units are low-maintenance, too—no spark plugs to replace, no fuel or air filters to service.