Exhaust and Vents

im growing in a small closet and i need some suggestions on exhausts and ventilation.

computer fans, any fans you can hook 4 or 6 inch ducting up to...air movement is key..imo

example exuast is 6 " you need 12 " passive intake and so forth

just make the intake size twicr as big as the exaust size, and pull air from your cab. not blow air in.