High Airflow Vs Static Pressure Fans

The relationship between air flow and static pressure of a fan is shown in the graph above.

High airflow vs static pressure fans.

The static pressure of one inch of water is the suction needed to draw water up a straw one inch. The 3 points depict possible scenarios where the fan will perform. 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. Airflow is the amount of air which is the fan is capable of removing at its greatest rpm.

This is a highly efficient design to move airflow volume with the least amount of fan blade noise. The two opposite ends of the blade design spectrum are the af airflow and sp static pressure designed fans. Sometimes static pressure is given as pascals pa. When it has no restrictions.

High airflow fans can run into problems when. In case of static pressure and air flow fans there are a lot of difference. Af style fans have many thin blades 9 15 typically with a relatively steep angle. And when static pressure increases air flow decreases.

As you can see air flow and static pressure have a negative correlation. When air flow increases static pressure decreases. Using the fan in the wrong scenario will affect your cooling to a great extent. The static pressure of 0 1 inches of water in.

For comparison 1 pound per square inch static pressure 1 psi is equal to 27 7 in. Water is equal to about 25 pascals pa.