Did the 'a/c ducting mod'. For those who don't know, the A/C ducting in most of our trailers keeps going past the rearmost and frontmost vents, basically into nothing. Makes it pretty un-efficient. So I got some low expansion spray foam and filled in the back half of the ducting. The ducts now deadend at the vents. (Did not do this to the middle vent as it carrys on past to the front bedroom vent) Haven't had a chance to try it out yet, but I've read that others who have done this have felt a noticeable difference.
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