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Help with fan direction in a portable mame cabinet/control panel
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Pioneer:
I have two holes cut for fans out the back of my portable mame cabinet/control panel. 

I was wondering if both fans should blow out or if one should blow in and one out for air flow?
javeryh:
I'm not sure but my guess would be one in and the other out to create some circulation.
SlyDog:
AHH the age old questiong,, Is it better to blow or to suck.

Depends on how much time you have to test it.  I only use one fan and i found it was cooler to flow into the cab than flow out.  with two fans you have 3 choices 2 in, 2 out, or 1in 1out.  Try each one wait about 10 min (doing something strenuous of course) and see what the core temp is.  I personally would "guess" that one in one out would be the best way to go.  You would blow in cold air and suck the hot air outside.
Pioneer:
Yeah it sounds good but I heard that if you're pulling in air that it's going to bring alot of dust onto the mobo (No I'm Sayin') Is this true.
RetroACTIVE:
Generally IMHO you would want to move air across whatever you want to keep cool, transferring the heat from it.

With that...consider using only one fan, blowing fresh air in and the other hole is the exhaust port where the warm air is evacuated... Adding a dust filter of some sort on the fan port will help keep crud out.
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