Quote Originally Posted by Fencepost View Post
There's no rule that the fan has to be mounted in the ceiling. You may find it easier to mount it on the exterior wall... venting is a breeze (pardon the pun).
Although not positive about this, I believe there are thru-the-wall units (basically "short" enough to fit through exterior wall framed by 2x4 & drywall/siding from Panasonic & others).

The problem is getting electrical power, installing a switch and having to repair plaster walls to get this done.
The duct opening on the outside should have a damper to close the duct; otherwise, the winter outdoors will make in to the room.

I've heard about this but not researched it.