A fan is a machine element that moves and distributes air or gas. Fans are primarily used in industrial and technical facilities, but also provide the required air flow in households and air conditioning ventilation systems. Fans exist in different sizes and shapes to suit a variety of applications. The most common types are: Axial fans, diagonal fans and centrifugal fans.
- Axial fans, which resemble a propeller, are often used in air conditioning and exhaust systems to move air. The axial fan consists of a rotating impeller that moves air or gas out of the housing. The drive motor is often located on the drive axle of the fan wheel. This fan normally has a closed housing that keeps air and gas out of the environment.
- Diagonal fans are a slightly modified version of axial fans. With these fans, the fan wheel is arranged diagonally so that the air is moved through the housing in a diagonal direction.
- Centrifugal fans are often used in ventilation systems to distribute or remove air in a room. In contrast to axial fans, the impeller of centrifugal fans is arranged horizontally and has an open structure so that the air can escape from the housing.