So, this past week, I had the opportunity to experience some real heat, since my ill-fated trip from SLC in my CC, which ended up with no functional A/C's in 120+ conditions.

I drove from SoCal to Mesa AZ to visit my brother this past weekend. He has had surgery, and although I would normally not go to AZ in the summer months, this was probably an important time to go.

Driving to/from Mesa I set the OTR at 75 degrees, and it performed flawlessly. We arrive in Mesa nice and cool. Temps indicated on the dash around 105 for most of the drive. Opening the door in Mesa revealed a blast furnace.

My new Marathon has roof airs, so this was the first time I tried to use roof airs, in a really hot climate. I don't know if roof airs are really designed to work 24/7, but they needed to during this visit. Temps on the SMX panels indicated as high as 118 (I assume that was a sensor in the roof air itself).

I have 4 A/C units, but generally kept 3 running (didn't run the bathroom air). It did seem to be able to keep the coach comfortable, however I will admit that roof airs right above you when you're trying to sleep isn't the best. I can't compare to cruise-air noise, but I assume it's a bit worse.

Anyway, we survived, and spent a week then at ORA Rancho CA. Days were high 90's, but nights were cool. Roof airs worked great, and was able to open up for sleeping evenings.

Anyone know whether or not it's OK to run roof airs 24/7? In Mesa, the lowest temps during the middle of the night were around 95. Day times were realistically around 110. Not my favorite end of the thermometer.

Ray