Centrifugal fan is industrial equipment designed to move air or gas in any industrial unit. The Centrifugal Fan is also called an industrial blower. The typical structure of a centrifugal fan comprise of a fan wheel which is made up of several fan blades or ribs mounted around a center. Centrifugal fans are used in increasing pressure in a gas stream and so it is popular equipment used for air pollution control systems. Centrifugal fans play vital role in central heating and cooling systems. Structure of centrifugal fan comprise of fan wheel, fan housing, drive mechanism and inlet/outlet.