High Airflow Vs Static Pressure Fans

As you can see air flow and static pressure have a negative correlation.

High airflow vs static pressure fans.

In case of static pressure and air flow fans there are a lot of difference. 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. The two opposite ends of the blade design spectrum are the af airflow and sp static pressure designed fans. 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 static pressure of 0 1 inches of water in. The relationship between air flow and static pressure of a fan is shown in the graph above. When it has no restrictions.

When air flow increases static pressure decreases. Airflow is the amount of air which is the fan is capable of removing at its greatest rpm. Af style fans have many thin blades 9 15 typically with a relatively steep angle. Sometimes static pressure is given as pascals pa.

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. The 3 points depict possible scenarios where the fan will perform. For comparison 1 pound per square inch static pressure 1 psi is equal to 27 7 in.

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