Vanlife Q&A: Roof Vent Question

In this post in the Van Life Q&A, a user asks:

Roof Vent Question

My thoughts:

Personally I’d go with either just something you can open and close or one with a powered fan like the maxxair or fantastic. You’re cutting a hole in the van anyway, and you may wish to use that to draw air much faster in some situations, like hot days.