Centrifugal fans are known for which characteristics?

Centrifugal fans are characterized by several key features that distinguish them from other types of fans. One of the primary characteristics is the radial air flow, which refers to how the air moves outward from the center of the fan. This design allows for high pressure and efficient airflow, making centrifugal fans suitable for various applications where significant pressure is required.

Additionally, centrifugal fans can be equipped with different blade designs, including forward curved and backward inclined blades. The choice of blade type affects the performance, efficiency, and noise level of the fan. Forward curved blades generally create higher airflow at lower pressure, while backward inclined blades are more efficient at higher pressures and produce less noise.

Moreover, centrifugal fans often have a scroll or housing design that helps to direct the airflow more effectively and increases the overall efficiency of the fan. The scroll also contributes to reducing turbulence and noise, which are important factors in many industrial applications.

Considering all these characteristics together — radial air flow, the use of various blade designs, and the presence of a scroll — it is accurate to state that all of these features are associated with centrifugal fans, justifying the choice that encompasses all these elements as a comprehensive description of the fan's characteristics.