I have a 35' Montana with a 15k a/c about center of trailer. I want to install a a/c in front bedroom, which is factory prepped for it. Just a non ducted unit. What size btu should I be looking at?...
I would go 13.5K, going to large in a small enclosed room is going to possibly make the compressor short cycle and wear out quicky. Too big can be just as bad as too small. Remember, you have a 15K to cool the entire rest of the coach so why oversize the small bedroom with no way for it to help coo the bigger area