As part of the manufacture and factory-commissioning of our fans, we precision-balance all of our full-FRP impellors.

Here is a demonstration of the accuracy of this balancing - a coin standing upright on the fan during installation and commissioning with the fan at full speed. Vibration is minimised and excess noise and energy loss is minimised - meaning the fan is more efficient and less prone to wear & tear. This is with a full-FRP fan impellor blade giving maximum corrosion resistance.

Reference: Job 83172-01 - E3988 - CHP-6 FANS