A centrifugal blower is a mechanical device for moving air and other gas through a specified path. They are typically used in the ducted application to draw air through the duct work, through pollution equipments to the exhaust stack. Kinetic Energy produced by the blowers during rotation is used to increase the negative pressure of the air stream. Centrifugal blowers drag air into a circular motion with centrifugal forces speeding up air flow radially and outwards to the exhaust stack.