Wide in demand in several industries for initiating and increasing the movement speed of air or other gases stream, Centrifugal Blowers are very simple mechanical devices. These work on the action of rotating impellers, through which high value of kinetic energy is produced. This KE increases the speed of air or gas stream move them against the resistance caused by dampers, ducts and other components.Primarily, these blowers accelerate the movement of air radially by changing its direction at 90 degree of the airflow. Some of the models in the blowers are designed as free-wheeling fans that do not require scroll housing. In addition to this, the motor is installed in the impeller of a centrifugal blower with external rotor motor for its effective cooling.