Okay, I think I get it now.
cpu fan blows into the heatsink/chip.
The PSU counts as 1 exhaust.
Top and rear end of the case are exhaust fans.
Bottom front are intake fans.
the side case fans can be exhaust or intake fans.
My question is, Do you need equal exhaust/intake fans ie. 2 exhaust 2 intakes, or do you need more exhaust fans ie. 3 exhaust 1 intake, or more intakes ie. 3 intakes 1 exhaust.
And if the side case fan is an intake, wouldnt it blow into the cpu fan witch would cause a problem?