All you need is holes towards the bottom for the intake. The fans push the air out, creating negative pressure (suction) inside and any holes in the box will automatically become intakes because the air pressure has to equalize. Hope that helps a little.

Oh, & glad you could talk them into more plants Means they are pretty interested as well!
redtails Reviewed by redtails on . >PLEASE HELP<>CLICK ME< hey guys, right i have been growing for around 4 years now, but only outside growing so never used a lights before, im looking to grow just 1 plant a time to get me to summer then the sun dose it job every year, im only wanting to buy 1 bulb to do a allround job, could anyone give me reason not to buy this bulb and go for a different one?? link is Growing Light | Indoor Grow Lighting | Light Systems for Plant Growth its a 250watt if anyone knows of a bulb that is better than this i Rating: 5