High Airflow Vs Static Pressure Fans

Using the fan in the wrong scenario will affect your cooling to a great extent.

High airflow vs static pressure fans.

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. Water is equal to about 25 pascals pa. As you can see air flow and static pressure have a negative correlation. The 3 points depict possible scenarios where the fan will perform.

This is a highly efficient design to move airflow volume with the least amount of fan blade noise. Af style fans have many thin blades 9 15 typically with a relatively steep angle. Sometimes static pressure is given as pascals pa. For comparison 1 pound per square inch static pressure 1 psi is equal to 27 7 in.

So what exactly is airflow and static pressure. The static pressure of one inch of water is the suction needed to draw water up a straw one inch. When air flow increases static pressure decreases. In case of static pressure and air flow fans there are a lot of difference.

The two opposite ends of the blade design spectrum are the af airflow and sp static pressure designed fans. Airflow is the amount of air which is the fan is capable of removing at its greatest rpm. High airflow fans can run into problems when. The relationship between air flow and static pressure of a fan is shown in the graph above.

In addition fans are generally optimized to either move a high volume of air with large blades and high rpm or generate a high static pressure. 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.