Hi Charlie; For an AC unit that you can easily swap out with your Coleman-Mach ducted setup I recommend the Furrion Chill HE Replacement RV Air Conditioner # FR42PV. This comes with a wiring harness that lets you plug directly into your Coleman setup making for a relatively simple and easy installation. This unit has a 15,000 Btu capacity but it is also available as a 13,500 Btu with # FR82PV. If you would prefer it in black we have the # FR32PV and # FR62PV as well. view full answer...