I am designing a small cabin, and plan for cooling is to use an off-the-shelf air conditioning window unit - framed into a wall instead of mounted in a window.

Is there a way to edit an item of furniture (3D object import) so that it can be mounted **through** a wall (just as a window or doorway is placed onto a wall) ?

I imported the closest thing I could find - a bathroom fan from the 3D models listing - however, it wants to be placed wither completely inside a wall or completely outside of a wall. I need it to go through the wall. I'm certain there's a setting somewhere - but I'm just not finding it yet.

Thanks,
BohoRex