[Ganglin]

We had planned to install a Coleman AC - have used them in the past with no problems and they have an interior cover that better matches the ceiling shape.

Ran across a really good deal on a Carrier Low Profile so now I may be leaning that direction instead.

Talked to the dealer about installation in an Airstream and they said they had done it many times. The question - they said it was necessary to install a couple pieces of treated lumber between the inner and outer skins to reinforce the roof/installation. "you'll see what I mean when you pull the old one".

Has anyone done that - if so can you tell me what was involved....