Backward Curved Centrifugal Fans consist of an external rotor motor with a plastic or metallic backward curved impeller assembly. These Centrifugal Fans are mainly used for intake suction and for continuous operation. These Centrifugal Fans are used in applications such as air conditioning units and in clean room equipments. Backward Curved Centrifugal Fans produce low noise during operation and ensure efficient performance for longer period of time.