Aha! You ask to where? I bought a new closet door already to replace the one I'm using right now. To exhaust the heat I cut a hole in the top of the door and added a vent to blow out the heat and smell but get this I have activated charcol inside a cheese cloth that I sewed into a bag and I just insert it into the vent tubing. The best thing is that it completly eliminates the smell of cannabis flowering and only slows the extractors power down by an almost unnoticable amount and it disperses all of the unwanted heat. As for the intake I cut a square 18"wide by 6"high and placed a eave vent cover over the hole to intake air. Next I placed a box fan in front of the door to push air inside the room. It works great all around. Oh i forgot to mention just to ensure there is no detectable odor I went to target and bought an item called True Air. It is a inexpensive odor control fan with a small filter inside. They are excellent for this purpose and you can buy a two pack for only $17.99. Hope I gave you apartment growers some help.