High Airflow Vs Static Pressure Fans

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.

High airflow vs static pressure fans.

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. When it has no restrictions. Sometimes static pressure is given as pascals pa.

When air flow increases static pressure decreases. The two opposite ends of the blade design spectrum are the af airflow and sp static pressure designed fans. The relationship between air flow and static pressure of a fan is shown in the graph above. 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.

Af style fans have many thin blades 9 15 typically with a relatively steep angle. 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. Water is equal to about 25 pascals pa.

The static pressure of 0 1 inches of water in. The static pressure of one inch of water is the suction needed to draw water up a straw one inch. And when static pressure increases air flow decreases. Airflow is the amount of air which is the fan is capable of removing at its greatest rpm.

Using the fan in the wrong scenario will affect your cooling to a great extent. As you can see air flow and static pressure have a negative correlation.