Exhaust fan venting?

Hi all,

In building a small darkroom in my backyard's shack, I have some questions on exhaust fan venting. The shack does not have an attic/crawl space or window for proper venting, so I'm wondering what is the best way to get the chemistry fume out of the shack. I'm thinking about just drilling a hole in the wall, as the walls are not very thick - is that a common solution? Thanks.

Hi there

see (there was a url link here which no longer exists) post for an answer.

regards
Peter