Well I looked into cool tubes awhile back and except for the fact that I already have a good reflector I would definitely spend the money for one in the future. If you get one good fan that would be all you need (a GOOD fan) and you want it to pull the old hot air out, not pushing cool air in.

As far as the rest of the ventilation I really don't know....I have never grown in a cab setup...just a spare bedroom so I will leave that one for someone with better experience on that.

Good luck.
Weedhound Reviewed by Weedhound on . NEEEEEED HID OPINION! Ok here is the deal.....below is a picture of my 3' tall cabinet and the 250w hps system i am considering buying...I have this idea where what i will do is cut a square in the top of the cabinet so that my HPS reflector can fit snug right over the hole....the ballast will be at the top of the closet on a shelf about 3 feet above the growbox....i have two fans 120mm computer fans already installed in the box one at the base of the plants and the other at the top of the box....not comming out the Rating: 5