Rear Clearance for vent?
How much additional room is need for the vent? Is it a side or rear vent?
If you are using the standard 4 inch duct work, and you can use the flexible kind you should be able to make it work. I have my unit in a closet under the stairs. It does have to be vented from the back of the unit, it could not be vented through the side of the machine.