dadmomh wrote:
Disagree on the "21'/non-issue". Our ROO 23SS HTT was ducted (actual box length was just over 20' + the bunkends. Our camping buddies had a Shamrock 19 - box likely more like 18 - 19'+ bunkends and theirs was non ducted. Huge difference - hot/cold spots, noisy, blast from center was uncomfortably strong yet some areas had almost no cooling. Strongly suggest you go for the ducted rather than kicking yourself later for not.
That's questionable, you have a ducted unit but know how "badly" a non-ducted unit works. I on the other hand, have a non-ducted unit and don't have any of those issues.
To the OP, I really don't care whether you buy ducted or non-ducted - I don't have any issues with either one. But in a 21-footer, I would put that on the bottom of my list of things to be concerned about. Like I said, I would strongly suggest you get the big stuff right.