Use Fan Affinity Laws to calculate required motor frequency and massive power savings when using Variable Frequency Drives.
Usually 60 Hz in North America.
Desired airflow percentage.
*Based on centrifugal fan affinity laws. Actual results may vary slightly due to motor efficiency curves and static pressure changes.
The Fan Affinity Laws state that a fan's power consumption varies with the cube of its speed. This means reducing a fan's speed by just 20% reduces its energy consumption by nearly 50%.
A VFD is an electronic controller that adjusts the speed of an electric motor (like an HVAC blower or pump) by varying the frequency and voltage supplied to it, saving significant amounts of energy.
Most residential systems use ECM (Electronically Commutated Motors) rather than external VFDs. VFDs are primarily used in commercial and industrial HVAC applications for large air handlers and cooling towers.
