Quote Originally Posted by PoolShark1321
yeah i have two computer plans i plan on putting in my grow box i only left the lights on for the night to test them... Should i put 2 fans blowing out of the box and just 2 open holes or 1 fan blowing out and one fan blowing in?
Yes put the two fans blowing out (active outtake) of the box at the top of the box. Leave some holes (passive intake) that are about 1/2 to 1/3 the total size of the fans. This is how I do it anyway. It creates a negative pressure that exchanges the air verywell, expelling the hot air from the top (hot air rises), and drawing in fresh cool air from the bottom. I also keep a fan on the inside for circulation.
good luck:thumbsup: