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.

High airflow vs static pressure fans.

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. This is a highly efficient design to move airflow volume with the least amount of fan blade noise. In case of static pressure and air flow fans there are a lot of difference.

The static pressure of 0 1 inches of water in. When air flow increases static pressure decreases. When it has no restrictions. Airflow is the amount of air which is the fan is capable of removing at its greatest rpm.

Water is equal to about 25 pascals pa. Af style fans have many thin blades 9 15 typically with a relatively steep angle. Using the fan in the wrong scenario will affect your cooling to a great extent. The relationship between air flow and static pressure of a fan is shown in the graph above.

And when static pressure increases air flow decreases. The 3 points depict possible scenarios where the fan will perform. The static pressure of one inch of water is the suction needed to draw water up a straw one inch. So what exactly is airflow and 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. As you can see air flow and static pressure have a negative correlation.