I am on the OK, TX, NM, AZ phase of our long trip in our 31DS with only one AC. I was very concerned with cooling. In fact, the 15K BTU unit seems to be holding up well. We have had multiple 100 degree days and as long as we get the unit started, close up the window shades, it will eventually lower the inside temp from 99 to 80 over a couple of hours and maintain it.
In two days we transition to Bryce Canyon and lower temps....
2016 Jayco GreyHawk 31DS
2016 Jeep Cherokee Trailhawk Toad.
SE Washington State