I have been contemplating how to use a window AC unit on camper.
Just as a given, and for discussion the roof unit is not an option,
There is no place on the back wall to use one. The only place would be the door, which is back wall, but the window opening on the door is about 14 inches, smaller than all window units width I see.
As a bonus I plan to get rid of the propane fridge and put a compressor chest in, though not in the fridge location. This leaves the fridge compartment as an option. I was looking forward to the extra storage space, but why not put the AC unit in here? There is already ample ventilation. It does not require to be waterproof, just a little water resistant from mist, so I can build the structure with wood and use duct tape to make it air tight if needed - though I would never rely on duct tape for a proper buildโฆ
Here the AC unit would not need to stick out, and on hot days with no rain I could even remove the access panel.
Other than lost storage space I do not see any drawbacks. I have seen window units stuck inside campers in much smaller spaces and the owner was happy.
Opinions not wanted, but professional feedback is OK, and I thought this was a good idea and maybe others want to try also.