Case Cooling/Pressure Question

[Rafaeleh]

I've got a phanteks p400a and I am thinking of upgrading my fans since i only have the stock ones installed.

This is what i intend on doing:



Theoretically i'd get 208 CFM of intake and 206 CFM of exhaust. The front fans are 140mm airflow fans, the top ones are 140mm static pressure fans and the back one is a 120mm static pressure fan.

My thinking is as the case has a mesh front panel the intake will be slightly lower, but as the top fans also have a dust filter on top those will also have a lowered exhaust and as the top filter has smaller holes, than the front mesh panel, and is closer to the actual fans i am guessing they will have a greater decrease in CFM than the front fans thus creating positive pressure in the case ?


My question is with this configuration will i theoretically get slightly positive pressure and will the air inside the case flow well?

 

[Rafaeleh]

I see i was having the wrong idea, that actually makes a lot of sense. Will try what you've suggested and also block the openings that now with further inspection it seems to have quite a few where air could be circling around.

Thank you so much for the explanation ! Greatly appreciate it.