[SOLVED] Airflow, Negative or Positive?

[mxnty]

Which airflow type is best? Negative or Positive? I’ve heard it’s positive, but I’m confused on how to achieve it. I have 3 120mm fans with 50.42 CFM and 1 140mm fan with 68.95 CFM. I also have 3 120mm fans with 18.28-73.11 CFM.
Space:
Front: 3x 120mm
Back: 1x 140mm
Top: 3x 120mm
(3x 120mm fans will need to go on rad, preferably mounted on top)

 

[alceryes]

If you have 3x120mm in front then just have 3x120 exhausting through the rad at the top. Your intake will have greater airflow compared to the 3 pushing air through the rad. That will give you a positive air pressure, which is preferred.
No need for the 140mm at the back. You don't want it fighting for air with your top exhaust anyway.