the door isn't that tight, most of it has gotta come form there, I can feel tons of air blowing out the vent outside. airs coming from somewhere tho. could also be the wall with the shelf, its just wood thats been painted, im sure some air leaks through there also.
yea its amazing how nice it is to do stuff like this tho. reptile room with all the plugs you could ever ask for. timers are one of my favorite things. I just love my basement not smelling now, b4 the rats were just in a corner in the open air. good luck on that new place.