optimal fan location?

[Conroy]

My case has places for a fan in the top, upper rear (below the power supply), lower front, and another one in the front directly above that.
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<BR>If using only two fans, is there a best theoretical place to put them?
<BR>If the two fans push different amounts of airflow, where should the more effective fan be placed?
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<BR>If using only one fan, Is there a best theoretical place to put it?
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<BR>I'll do some experiments and post my results too if there is interest...
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[addsig]

[Conroy]

er
<br>i guess this is similar to dizzie's post down there
<br>but i can't figure out how to delete this
[addsig]