Ordered parts from ppl moterhomes, cost $144 - ceiling assembly and thermostat kit
Parts from home depot, $50 - thermostat wire, low volt wire, HVAC tape
Still need to patch screw holes from old ceiling assembly. Took out rv for a long weekend at Disney World @ Orlando. Worked great.
Old ducting was all supplied by 15,000 btu unit in main room. I blocked off the ducting going to the bunk room, bathroom, and bedroom. This duct is now supplied by the 13,500 btu unit in the bedroom.