I've installed a temporary 12v
fan on the dash. My plan is to mount a quieter fan on the center divider between the windshields. The fan makes all the difference.
I generally have to tuck my cockpit curtain up onto a shelf behind the drivers seat to keep it from flapping out the window when at highway speeds. Something else I have to do is to make another dome fastener tie back for them.
1984 28' Funeral Coach
Former Rolling Showroom & PuttLab (now party bus)
"I'm not an expert. But I did sleep in an Airstream last night."