Fan - In or Out?

[toml_12953]

Now that I'm running my 8800c with eight boards, it's getting too warm in the case. I'm installing a 120 mm fan on the back wall of the case but my question is which way should it blow? When I build PCs, it's easy. Fans near the bottom should suck cool air in and fans near the top should blow hot air out. With the 8800c, though, there's only one fan and it's neither near the bottom nor the top. I am leaning toward using it as an exhaust fan, blowing the warm air out but I figured I'd check with the experts here first. Does anyone remember which way the original Altair did it? There's no mention of it in the assembly manual and I don't remember.

[AltairClone]

I’ve seen systems and Altair drive cabinets with the fan blowing both directions. I’d tend to choose having the fan blow air into the system so you don’t end up with a single strong breeze blowing dust around behind your system.

Mike