Originally Posted by Don Meyer
In a car you are recirculating interior air if set that way & it cools better than cooling hotter outside air........to duplicate this in the Scamp it
would seem that you should bring cabin air into the side & top of the a/c unit.
This could be done by putting a vent in the side of the closet next to the a/c unit to pull interior air in thus, recirculating cabin air.
Would this work???
Simple answer: No, it would not work and I would not recommend it.
Longer answer: When cars recirculate they take most of the air from the inside, cool it more, and put it back into the cabin. But even in recirculate the hot end of the AC is taking cool OUTSIDE air, transferring heat to it, and keeping it OUTSIDE.
When properly setup your trailer will also work like your car in recirculate mode. The trailer's cool air will come in the bottom front of the AC and exit the top front just like your car takes cabin air, cools it even more, and sends it back into the cabin.
You must have normal temperature OUTSIDE air that comes in the sides and top, gets warmed up and then exhausted out the back of the AC to the OUTSIDE.
If you do what you suggested the AC will work hard and not cool off the trailer. The reason is that the fan will be taking "kind of cool" air from the trailer through the sides and top and to the outside. Air from somewhere will have to replace that air that just left the trailer. Every little leak in your trailer will let in a little air to replace that air. That air is warm so your trailer warms up instead of cools down and you end up with a battle of the AC trying to cool it, but warm air coming in trying to warm it and the whole thing doesn't work well.
Thanks to Frederick Simson for the picture below showing the air flow how it should be.