High Airflow Vs Static Pressure Fans

So what exactly is airflow and static pressure.

High airflow vs static pressure fans.

The two opposite ends of the blade design spectrum are the af airflow and sp static pressure designed fans. When air flow increases static pressure decreases. High airflow fans can run into problems when. For comparison 1 pound per square inch static pressure 1 psi is equal to 27 7 in.

And when static pressure increases air flow decreases. As you can see air flow and static pressure have a negative correlation. When it has no restrictions. Af style fans have many thin blades 9 15 typically with a relatively steep angle.

In case of static pressure and air flow fans there are a lot of difference. Water is equal to about 25 pascals pa. Following on from my last article where i looked at whether push vs pull vs push pull makes a difference today we are looking at static pressure fans vs airflow fans. The relationship between air flow and static pressure of a fan is shown in the graph above.

The static pressure of one inch of water is the suction needed to draw water up a straw one inch. The static pressure of 0 1 inches of water in. 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. Sometimes static pressure is given as pascals pa.

The 3 points depict possible scenarios where the fan will perform. Using the fan in the wrong scenario will affect your cooling to a great extent.