All you really need to know about airflow is that there needs to be enough to keep temps under control. Some cases do this better than others, like mine in this case. Phanteks didn't really do a good job. The most common way to do it is to have balanced pressure in the case meaning you have fans taking air in and exhausting it out. The most common way to do this is to put a few fans in the front for intake and one at the back for exhaust. Depending on your components and where heat is actually being generated, this can change.
ToneBone got a reaction from LinusPCHelp415 in I can't get my head around case fans.