How can you vent through a sofit if the roof is sucking in on the sofit?

It will just suck back into the roof

HeyBub wrote:
The dude wrote:
I am not sure how I would vent through the wall, unless the fan was
mounted on the wall.

If I mount it in the ceiling, that is the attic.

Put a 90° elbow on the pipe and vent the stuff through the soffitt.