Yeah, I'm there right now with 5 plants flowering and a closet that seems to be shrinking...I need to get some exhaust in the room asap. At least I'm in there every night opening the door and working on the plants, like tonight i've gotta water so they'll get tons of fresh air, but I know that at some point there going to be hungry for fresh air.

I have access to cold air from my crawlspace, it's pretty humid and cold, I wonder if I could use it for "fresh" air, especially in the summer when it is hot above ground?