Why dynamic balancing is so important?

Balancing is a standard manufacturing process for each every fan from INFINAIR. It is actually a process of adding (or removing) mass in a plane or planes on an impeller, to move the center of gravity towards the axis of rotation. By doing so, the fan would generate less noise and vibration during running. The unbalance level is G2.5 for small fans or G4.0 for centrifugal fans typically.