by digimark » Wed Oct 14, 2009 12:57 am
A portable A/C is not a bad idea, but remember you still need to vent it to the outside to remove the heat. So that will require a smaller hole or a bigger window (so you can mount the window vent).
Your typical 5K-8K BTU window-mount A/C box is about 30-50lbs so anywhere you want to put it will need to be strong enough to support the weight. You also need to consider a way to protect it when you are driving. Some people have it on a sliding tray so they can retract it when traveling.
It's not hard to install a reinforcement to a roof vent for one of the roof-mount units. If you aren't comfortable doing that kind of work, the trailer dealer can do it for you (for a price) or you can enlist some other professional help.
In any case, you'll need to run a 110V power connection to it; almost all A/C units draw too much current to run on batteries (unless you have a whole lot of them...) And you want the hole where the A/C mounts to be water-tight and air-tight to prevent leaks and keep the cold inside. Roof-mount A/Cs have an integral gasket that gets installed; wall-mounted units require that you seal around the unit. If you do a search on A/C on the forums, you'll see others working through the same issue (including myself) and some of the answers we've found.
Air Conditioning not Alternating Current.
