I am in the process of installing an air conditioner in the cabinet under my stove top. I mounted the AC to a 1/2" piece of plywood on 3/4" risers, shown in picture. This allows me to pull the AC out when needed and slide it back in when in tow. When in tow the ac is held in place by two notched boards not visible in picture. The AC can be taken out if not needed when camping in cold weather.
I made a small drain pan with hose attached to drain the water out the vent panel. One picture shows the drain pan in place, you can see a small part of the drain hose sticking out of the vent door in one of the pictures.
I run an extension cord for the AC out the vent door to shore power until I upgrade my trailer power, only have 20 amps. This is my first iteration and keeps my 16' scamp
trailer at around 79 degrees when it was 98 degrees outside.
Excuse the picture with mud on the door my muddy dog decided to shake off inside the trailer when I was taking pictures.