Quote:
Originally posted by Cyco-Dude
as long as you have an equal or greater amount of air comming in than going out, youll be ok.
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Oops
I guess you meant the opposite... Over-pressure is what's to be avoided, as explained by nemaste and others.
Make sure you the total air coming out is more than air coming in.
2 fans in serial with an impedance (rad) wont add up their CFM's exactly, but will create a good pressure. It all depends on the efficiency of your 3 exhaust fans.