$10 vent system

I have setup my vent for my small closet which I will be growing in. The vent consists of a small fan, carbon filter, cardboard box, tape, staples. I plan on getting a small cover to screw onto the outside of the door so it looks like a normal vent, but I can get some cheap one from walmart or lowes.

Nice idea. Is that exhusting enough? Whats your temps and your lighting?

CFL's and the grow space is only 4 feet by 2 feet. the temps normally stay between 70 to 80 degrees