A centrifugal fan is a mechanical device designed to move air or gas by using a rotating impeller. Unlike axial fans, which push air straight along the axis of rotation, centrifugal fans draw air into the center of the fan and then force it outward at a 90-degree angle. This difference in airflow direction is the main feature that sets centrifugal fans apart and makes them suitable for many industrial and commercial applications.One of the most important differences between a centrifugal fan and other types of fans is how pressure is generated. Centrifugal fans are especially effective at producing higher static pressure. Because the air is accelerated outward by centrifugal force and directed through the casing, the fan can maintain stable airflow even when connected to ducts, filters, or other system resistance. This makes centrifugal fans a good choice for ventilation systems, dust collection, HVAC equipment, drying systems, and exhaust processes where air must travel through restrictive pathways.Another difference is the fan structure. A centrifugal fan usually consists of an impeller with forward-curved, backward-curved, or radial blades, all enclosed in a housing. The housing helps convert the kinetic energy of the rotating air into pressure. Different blade shapes create different performance characteristics. Forward-curved blades often provide high airflow at lower speed, while backward-curved blades are generally more efficient and better suited for high-pressure applications. Radial blades are commonly used in environments where dust, particles, or heavy air loads are present.In comparison with axial fans, centrifugal fans are generally quieter under certain operating conditions and can be more reliable in demanding environments. Axial fans are better for moving large volumes of air with low resistance, such as in open spaces or simple cooling tasks. However, when the system includes long ducts, bends, or filters, centrifugal fans perform better because they can overcome resistance more effectively. This is a major operational difference between the two fan types.Centrifugal fans also differ in efficiency depending on the application. Their design allows for precise control of airflow and pressure, which helps them adapt to a wide range of industrial needs. They can be made in compact forms or large heavy-duty versions, depending on the required performance. Some models are built to handle high temperatures, corrosive gases, or abrasive materials, making them more versatile than many other fan designs.Maintenance and durability are also key points of difference. Since centrifugal fans are often used in tougher working conditions, they are usually built with strong materials and robust components. With proper maintenance, they can provide long service life and stable operation.In summary, the main difference of a centrifugal fan lies in its ability to move air radially, generate higher pressure, and perform well in systems with resistance. These features make it one of the most practical and widely used fan types in modern ventilation and air-handling systems.