If you are looking for an RV AC unit that is ideal for ducted systems, then the Coleman Mach 15 A/C Unit might be just what you are looking for. The unit contains a 1/3 hp fan motor which delivers 325 cubic feet per minute of cool air. The fan motor is mounted directly to the bulkhead. This fixes the angle of the blower wheel, ensuring that it turns freely with no interference. The unit also contains oversized coils with raised lance fins. The larger surface area improves the heat transfer capacity of the coils. The tubing is 100% copper and includes a rifled interior wall. This creates turbulence in the coolant flow, expediating the removal of heat from the air.