x2 on the no ceiling fan.
I found the maxair turbo fan over a front vent works far better. At least you are recycling the air not just pushing it over your ceiling.
Maxxair Turbo fan is located OUTSIDE the MH. You can't even hear it. I installed it over my front roof vent. You turn that puppy on exhaust and open the roof vent in the rear of the coach and hang on to your hat! Since I installed it I use the AC 50% less of the time. AND the coach smells like fresh air instead of stale AC'd air. Best thing I have bought for the MH.