I'm totally in favor of fresh air. Since hot stale humid air rises, and cooling refreshing air descends, the obvious solution is an opening vent in the ceiling.� Ideally over the area you sleep & breathe.

As for me, I cut a 14" x 14" hole in the roof of my hardtop non-Westy 22 years ago.� Guts it took with that sabre saw.� Installed a generic roof vent (back then they were low profile aluminum that you could paint to match, not the plastic kind I see so much of now; the kind where you twist a knob to open and raise the thing; yes, with a screen, bugs are NOT an option.

Immediately rejoiced over the improvement!� So loving it these past 22 years.� 

You Westy-owners could easily add a second roof vent I think.

Fresh air when sleeping and living in a confined space is the solution; how to get it is the problem.� I like to use physics, rarely lets you down.

(Surprised that GoWesty doesn't offer some kind of screen solution for them thar cool real sliders...again, I WILL NOT tolerate biting bugs.� Neither should you.)

Rich
San Diego