I DO NOT tolerate heat well. And you know what they say…if momma ain’t happy, ain’t nobody happy.
It’s been about eight years since I replaced the A/C in our ’77 31’ Sovereign
. At the time I was told that the best I could expect from an RV A/C unit was ten degrees cooler than the outside temp.
I purchased the largest (BTU) unit I could find. The unit was oversized for our coach. I know that in this case bigger is better, because the less the unit struggles the better it cools. I also added awnings all the way around and a dark window rock guard.
All our curtains were very insulated, and we looked for shade to park in whenever possible. I was very happy with the results. The coach air was always dry, no matter the humidity. And it stayed fairly cool.
I am sure you’ll receive more technical responses. But I thought I’d share my experience, too.