Looking at 2600RB. Has one 15K air. They show heavy insulation in this unit. Wondering how well they cool when it's really hot? Unit is about 29' box maybe 25'. Thanks in advance.
Can't speak to that make or model, but our trailer is 5' longer, with more windows and a bunk room in the back. We have a single 15k that has easily done the trick for 2 summer trips to central FL. It runs most of the time, but in the heavy humidity and 95 degree heat, it held at 72 in the rig with no problems.
If you are going to be in the AZ desert at 110+, that's a different issue. Some partial shade and humid 90's, however, has been no issue for us.