The R-4013H is a compact, versatile and high-output heater/defroster. Like other RedDot heaters, the tube and the fin coil design allows mounting in any position. A diversion door can be manually or cable-actuated to control defrost and heat output. An optional adapter to the heat outlet turns the R-4013H into a dual defroster or multi-compartment heater. Available with 20,000 BTUs.