Sure it is! It's nothing to cut a small, 3" diameter hole in the wall and when done simply cover it with a painted wall vent grill when done with the grow. No one will notice it when you move out as it will look like it was put there on purpose and it'll be neatly covered and finished after you screw it into the wall! Or you could even get more involved and plaster the hole when finished but the vent grill/cover will save you needless work for about 10 bucks!