Before I finish the insulation and paneling, I’ve got two possible locations for an exhaust fan. The most likely part is near the rear on the starboard side, which will be over where my bed is going to be. It’ll be a murphy style bed, thin 4" thick pad in a frame, and the bed will probably cover the fan opening when driving. I’m looking for brand suggestions (ordering in the US) that has rain-proof louvres or a cover, also can switch between intake/exhaust.
The van is a 2003 Savana, and I’m about ready to start working on that wall.
Another (also possible additional) location is in the wall of the rear driver’s side door. That one would be solar, and mostly to keep air circulating while driving. Unlikely to be more than me and my dog sleeping in there.
While this van is partly for sleeping, and road trips, the plan is a mobile jewelry bench I can take to shows or craft fairs. While working inside the van, ventilation is critical (torch use, etc) so there will be times that just a couple open windows will not be enough. With the right conditions, when parked and working at the bench one or both of the rear doors will be open, with tarped canopy for outside work. Cooking is unlikely to be much indoor stuff.
Not really interested in a roof vent. While yes it’s been horrible hot lately, today at 102*F parked in the sun, since I’ve got the ceiling, port side wall and floor insulated and sealed, 'though it was hot, especially with the floor done (finished it yesterday) I’ve noticed it’s no more than outside temp inside now. So likely something wall mounted, as I asked about in the first paragraph, should be enough.