Static Pressure Fans Vs High Air Flow

A fan performance spec is given as a fan total pressure or a fan static pressure which can handle a certain flow rate.

Static pressure fans vs high air flow.

Static pressure fans come with wider blades but the gaps between the main difference has a direct connection with how the fans are optimized because the cooling system works differently. It can be expressed in these terms. For mechanical ventilation systems the fans create positive static pressure to move air through a given system. The relationship between air flow and static pressure of a fan is shown in the graph above.

Static pressure optimized fans made to push the air harder through small spaces. What fan should you use. When air flow increases static pressure decreases. Specifically i will be using corsair s sp120 and af120 models as these are very popular fans and have clearly defined characteristics sp for static pressure af for airflow.

And when static pressure increases air flow decreases. So there are two situations where you might think of choosing between a static pressure fan and an air. Fan total pressure is the pressure differential between the inlet and the outlet of the fan. Static pressure is used to evaluate the amount of impact various ventilation system components have on the airflow path within a given system.

High airflow fans simply push as much air as possible while static pressure fans are specifically designed to tackle installations with heightened impedance and resistance. As you can see air flow and static pressure have a negative correlation. The 3 points depict possible scenarios where the fan will perform. With static pressure fans vs airflow fans the fan blade structure is the main difference between these types of fans.