Medium size powered vent?
on my Sprinter Westfalia, I have a fantastic vent for the main cabin and as tiny solar vent for the bathroom.
The fantastic has enough power, but needs to be closed while driving and in rain.
The solar vent runs all day long under any condition, but has far too less power. We have a wet bath and hang our towels there to dry. A better air flow would be helpfull.
As you can see, the roof is too small to place another big fan (MaxxFan)
PS: I have to upload the photo later. Doesn't work right now. Sorry.