The fan and blower are two different kind of machine belonging to same group. Both these machines are used to flow a gas or mostly air in a large area but the main difference between fan and blower is that the fan operates at low pressure while blower operates at high pressure.
The fan consists a rotor which is equipped with some blades. This rotor rotates by an electric motor or sometimes by a mechanical machine. It is primary used to flow the air into a large space. Mostly fans are used to blow the air axially or the direction of the air flow along the axis of the rotor. Fans blow large volume of air with minor change in pressure. It has specific pressure ratio is 1.1.
Blower is different from fan. It is a centrifugal unit which blows the air radially. It consists of a impeller equipped with series of blades which are designed to flow air radially. It blows the air or gas with a moderate pressure change. The change in specific pressure ratio is 1.11 to 1.2.
These machines are used in many industrial machines for air conditioning or cooling purpose.
The fan consists a rotor which is equipped with some blades. This rotor rotates by an electric motor or sometimes by a mechanical machine. It is primary used to flow the air into a large space. Mostly fans are used to blow the air axially or the direction of the air flow along the axis of the rotor. Fans blow large volume of air with minor change in pressure. It has specific pressure ratio is 1.1.
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