AC temp in 5er compared to outside

joeburnes wrote:
I've heard that at best you should get an inside trailer temp of about 20 degrees less than outside. I live in Texas. It's 94 outside right now and about 78 in my 5er.
I have a 32 foot Montana with one 15,000 BTU A/C. BUT, I have the arctic package (upgraded insulation). It is a 2004 so the insulation package isn't as good as the newer models.

We had a 1996 30' Jayco Designer 3030RKSS that we bought new when we lived in Ohio - our first 5th wheel. It had one 13.5K BTU Coleman A/C. When we moved back to Texas in 1997, we quickly discovered that a single 13.5K A/C wasn't going to cut it in the Texas summers. Since ours was a 30A service unit, we limped along until 2000 when we replaced it with a 36' Jayco Designer XL 3610RTS that was wired for 50A service and prewired for the 2nd A/C. The Houston RV dealer tried convincing us that a single 15K BTU A/C was all we would need, but there was NO WAY that 5th wheel was leaving the lot until a 2nd 15K BTU A/C had been installed.

That 2nd A/C is pretty well mandatory for summer camping in southeast Texas because you're not only fighting the high temperatures (sensible heat) but also the high humidity (latent heat) that the A/C must remove from the air by condensing water vapor to liquid (the condensate that runs off your roof).

Rusty