[BravestDog]

2 questions about ventilation.

1. When a class 8 motorhome is driving down the road and it's 90 degrees outside, how do you cool down the interior of the cabin of the motorhome? Do the roof top units cool the cabin and are they powered from the trucks alternators or do they run off the auxillary generator?

2. When a class 8 motorhome is parked with all motors off and it's mild outside, say 50-70 degrees, is there enough ventilation through the windows so when you are eating, lounging, sleeping...you feel comfortable or do you need to run the ventilation system via the aux generator to get more air moving around inside the motorhome cabin?

It's really a simple question. I'm just having a difficult time explaining it.

I guess my questions are:

what powers the ventilation system and how is natural ventilation through the windows when not moving?

Any comments, suggestions...Thanks