Quote Originally Posted by pudder
What I did was had a 8" extraction point and 4 - 4" intakes. 2 on each side of the box. and one with a blower that is 5 inches.
Wait. How does it make sense that the area of exhaust be smaller than the area of a passive intake? If you want a consistently one directional intake, doesn't it make sense to have more exhaust than intake? As your passive intake holes get bigger the strength of intake decreases, right?? I feel like I'm taking crazy pills here!

(Also remember: an increase in a circle's diameter increases the circle's area exponentially. So, a 8" hole is not double the size of a 4" hole, but closer to quadruple the size.)

Peace.
bstheory Reviewed by bstheory on . Does this look ok? I started working on a grow box well cabinet that in all costs around $200. I have pictures to go with it. contains: 8 - CFL compact fluorescents 23w 100w equivalent 2700k 4 - CFL fluorescents t8 tubes 17w 75w equivalent 6400k 2 - CFL fluorescents t4 tubes 8w unknown equivalent 3100k need to work on air flow next. have to have doors open and fan on them to keep cool enough. Don't want dead plants ya know. Cabinet is also being used for all storage of nutes, spare bulbs, soil, Rating: 5