Quote Originally Posted by blink_inc
The CPU fans would input from the bottom. Cooler air.
There may or may not be a fan inside to circulate.
There will be a vent (exhaust) at the top with a scrubber that will vent with my dryer outside the house.
Blink - I don't know how to say this real nicely, but this plan sucks in so many ways. But that's ok because many initial plans suck, I know mine did. Until you actually have a bulb burning inside a box you don't really appreciate how hard it is to get the heat out and how much ventilation you actually need.

I really think you should go to the cabinet/closet section and do some reading about grow boxes and ventilation.

To use a scrubber, you need a fan attached to the duct the scrubber is on. passive air flow won't work. Most scrubbers connect at the end of a duct. i.e., they don't go in-line where you have duct -> scrubber -> duct.

And fans inside your box are a definite must. The plants need/love air circulation.