Convert AC from ducted to non-ducted

TomG2 wrote:
How big of a deal would it be to convert a typical Dometic 13.5k btu roof mounted RV air conditioner from ducted to non-ducted? Is it a do-it-yourself project for a typical RV owner? I have a newer model with the three button electronic wall mounted thermostat.

You haven't told us just which "typical" Dometic A/C you have but whether it's an older BriskAir or the newer Brisk Ii the top unit is the same whether it's ducted or non-ducted so all you'd have to swap out is the ADB (Air Distribution Box). Since all A/C control will then be on the ADB you'd lose the ability to set the A/C to Auto and have it cycle on / off completely as you now can with the wall mounted thermostat. Instead, with the direct blow ADB the fan will run constantly as the compressor cycles on/off according the setting of the thermostat that's part of the ADB. IIRC Dometic does offer a wall mounted thermo designed to be be used with their non-ducted ADB but I'm not sure if you could use the existing wiring loom from the A/C to the current thermostat or would have to replace it. For more info I'd suggest you take your A/C info to your local Dometic dealer and have them correctly identify the correct ADB, and wall mounted thermostat if your current one isn't suitable. I've owned Carrier, Coleman, BriskAir, and now have a Brisk II in our current rig and IMO our current non-ducted Brisk II is noticeably louder than the ducted Coleman Mach 3 Plus we had in our previous Spree but it does do the job.