Ventilation Questions?

So I have built these two grow boxes for my garage (they sit side by side):

4ft wide/ 8ft tall/ 8ft deep

I am setting up a green grow with these 2 boxes and will run 3 aeroponics boxes under 2 -1000w mh/hps lights In each box. What kind of vetilation system aka can fans and carbon filters should I use to cool my lights and get some fresh air in to both boxes.


I was thinking something like this..
X = Light CF=Carbon filter

WALL...200cfm.....X....X....WALL...400CFM...X...X.....CF...WALL

I went with the 6 inch grow bright fan and carbon filter combo.heres the link
http://www.htgsupply.com/viewproduct.asp?productID=52609

My room is a touch smaller than yours but not much.This combo about pulls the paint off the walls.Its not to noisie but does need a speed controller to calm it down some.Mine pulls both the cool tube and the carbon filter and will pull your hair into the room intake without a problem.The other fan I was looking at was the s and p 6 inch duct fan.That one is prolly quiter from what I read but both fill do your room just fine.