Centrifugal fans

Three types of centrifugal fans determined by the type of fan blades:

Forward inclined blades,backward inclined blades, and straight radial blades.

The fans in your home furnace, vacuum cleaner and hair dryer are examples of centrifugal fans. They can operate against a high resistance and are typically used in local exhaust ventilation systems. The rugged radial blade centrifugal fans are the best type for exhausting heavy amounts of dust because they are less likely to become clogged or abraded by the dust.
Centrifugal fans