![]() Having positive air pressure means that the air will be drawn primarily from your intake fan(s), and as I’ve mentioned, the air is easier to filter.Ī standard air filter can be installed in front of your intake fan(s) if your case doesn’t have one to ensure that cleaner and more dust-free air is drawn into your case.īecause the airflow is more balanced (but not equal air pressure), plenty enough air is still exhausted, which means plenty is flowing in and out to help achieve optimal airflow. This is what I have found to be the best in terms of keeping things cool and clean. Slightly positive air pressure (More balanced) This results in stagnant air, which can get hot from the internal components and raise the PC’s internal temperature. If a lot of air is being forced into the case with little exhaust airflow, you can find yourself in a position where insufficient air movement occurs. While having some positive internal case air pressure is good, it is not the best if it’s too excessive. The intake fans have a higher airflow rate than the exhaust ones. Positive air pressure means more air is blown into the case than out. If these conditions are present, it can be argued that the case may remain clean for longer periods. The computer case cannot have too many unfiltered intake areas.The filter must have the correct cross-flow rate.The filter must have the correct pore size and density.There must be a large enough intake area that is filtered.However, in some unique instances, you could have a situation where a negative air pressure configuration won’t draw in much dust. This is because air may be drawn in where the is no place to add a filter. It is also more difficult to add filters to the intake areas of the case that specifically draw air in through them exclusively. While it is an effective way to cool your system, it can often result in more dust being pulled into your system over time. Side note: The same points listed here can be applied to any fan configuration when comparing airflow rates. ![]() The exhaust fans have a higher airflow rate specification than the intake ones.The exhaust fans spin faster and are the same size or larger than the intakes. ![]()
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