Depende rba nah sa case boss kay each case naay most efficient airflow. Mostly mas nindot gyud ang negative airflow.
Example: CM Scout 2
2 front intake
1 bottom intake
2 top exhaust
1 (push and pull for CPU LCS) rear exhaust
2 side exhaust
Benefits: Dust gathered by intake fans won't reach the MoBo where most all the components lie. Exhaust fans quickly dissipates the accumulated heat sa sud. Basta naa lay air pressure ma-build, mas nindot gyud ang airflow.
Positive: Gets rid of heat faster but more dust
Negative: Vice versa(less dust, more heat)