Centrifugal fans with forward curvature impellers have a lower efficiency than reverse curved impellers that produce more pressure. These fans are usually used in clean air or gas, as this type of impeller may become contaminated after a while and the impeller may go out of balance. The maximum efficiency of these fans is 65%. These fans are also known as Cooler Butterfly fans and are overloaded.
You can also make a price as a seller
Request a price to negotiate and get a better offer