Quote Originally Posted by Slevinkal
The grow box he linked to has ventilation.

There is a 80mm fan at the bottom, on the back, blowing in and another 80mm fan at the top, on the back again, blowing out.

You can always tell the direction of PC fans by looking for the wires going into the actual motor itself, the side the wires are on is the direction the air moves towards.

EDIT: oh ya! the fan at the bottom also is a circ fan too
If you check back on my PC grow, a single 50w panel with an 80mm outtake and 120mm intake couldn't keep the temps down below 85F.

I'd be really wary of two little 80mm fans with a 120w panel.