Yea i agree. but i cant stress the heat thing enough. if it is completly sealed it will get very hot very quickly. Just to give you an idea, my closet intakes air from my room, it circulates and then exits through exhaust venting running outside. I have air conditioning in my room so i control the temp of the air going into my closet. i have found that my closet is about 15-20 degrees hotter than my room is. my point is, how hot it could get if i wasnt running the airconditioner. during summer if it was 80f in my room the closet would be around 100 degrees and my closet is 8ft tall 3ft wide.
anyway hope this helps, im going to post pic in a few min.