Static Pressure Fans Vs Airflow Fans

The two opposite ends of the blade design spectrum are the af airflow and sp static pressure designed fans.

Static pressure fans vs airflow fans.

A matching of the system occurs when the airflow delivered by the fan at a given static pressure equals the static pressure resistance of the. Remember airflow fans are for the majority of uses where there s very little restricting the airflow. This is a highly efficient design to move airflow volume with the least amount of fan blade noise. 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.

With static pressure fans vs airflow fans the fan blade structure is the main difference between these types of fans. The 3 points depict possible scenarios where the fan will perform. The relationship between air flow and static pressure of a fan is shown in the graph above. High static pressure fans are for situations where there s quite a lot of restriction in front.

As you can see air flow and static pressure have a negative correlation. Static pressure means when you take the same figure as airflow fan but also including the amount of resistance the fan is able to push through. Af style fans have many thin blades 9 15 typically with a relatively steep angle. Linus explains the difference between high airflow and static p.

And when static pressure increases air flow decreases. When air flow increases static pressure decreases. Resistance is greater than the available static pressure of the fan the airflow cfm delivered by the fan decreases until the system pressures match.