High Airflow Vs Static Pressure Fans

Sometimes static pressure is given as pascals pa.

High airflow vs static pressure fans.

The relationship between air flow and static pressure of a fan is shown in the graph above. Using the fan in the wrong scenario will affect your cooling to a great extent. The two opposite ends of the blade design spectrum are the af airflow and sp static pressure designed fans. Af style fans have many thin blades 9 15 typically with a relatively steep angle.

So what exactly is airflow and static pressure. 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. When air flow increases static pressure decreases. And when static pressure increases air flow decreases.

The static pressure of 0 1 inches of water in. In case of static pressure and air flow fans there are a lot of difference. Water is equal to about 25 pascals pa. 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. As you can see air flow and static pressure have a negative correlation. High airflow fans can run into problems when. 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.

When it has no restrictions. The static pressure of one inch of water is the suction needed to draw water up a straw one inch.