[quote name='FlyingAce39']Now, by "push pull", do you mean like this:
I was thinking this push pull system would be more efficient.
->|___|->
It would blow hot air towards the console, but it would also blow more hot air towards the other fan (which is pulling air out) as well.[/QUOTE]
I meant the latter. The fat PS3 actually puts out a lot of heat and in a confined space like in the pic, you definitely want to get rid of as much hot air as possible. The fans should be help airflow go in the direction of the intake and exhaust ports. dafoomie's comment would be correct in certain contexts though. You just have to figure out what you want to make first.
[quote name='dafoomie']My last preassembled machine was a 386, I just think LED fans are tacky. For something like this if you're going to have ventilation it should be unobtrusive, I don't think those even have grills on them. Push pull is totally unnecessary when you have a wide open shelf like that, might even be counter productive.[/QUOTE]
Since 386's huh? Your family must've been doing pretty good for that, but I agree that LED fans as tacky as hell(nothing personal to the owner of the unit).
There might be a couple inches behind the unit, but unless there's good airflow within the room itself, the hot air just kinda lingers where it is.