Hey Mister. my current grow is in a cab almost idetical to that one only the space above the draws is a little smaller. yes get more than one computer fan. i have an old fridge fan for intake and one for out take. and it still gets up to 80-90 F. but its also designed poorly. ill improve that on the next grow. i have 3 plants in there each a week apart but soon as i get their sexs ill kill 2 of them because once their flowering they get huge. and it will fill up the cab.