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What Is A Centrifugal Fan? – Complete Guide

A centrifugal fan is one of the most efficient fans on the market today. Most people think of a centrifugal fan as just a fan; its intricacies are not exactly common knowledge.

This complete guide will tell you everything you need to know about centrifugal fans. You might be wondering ‘What is a centrifugal fan? What are centrifugal fans used for? What are the different types of fans?

We will answer these questions and more. We’ll also highlight several useful videos from HVAC experts who break down these concepts in great detail.

A centrifugal fan or centrifugal blower is a pump or motor that moves air. It pulls the air inside the blower and then pushes it out at a 90o angle. The two main components of a centrifugal fan are the motor and the impeller. An impeller sucks or pulls air, in contrast to a propeller which pushes air.

Some fans can pull and push air at lower than a 90o angle; these fans are called mixed flow fans.

Centrifugal fans can either have no exterior housing or structure to offer protection or they can be built with some protective housing.

As shown in the video below, there are five different types of centrifugal fans, which differ based on the type and shape of the fan blades.

Backward curved blades

Backward inclined blades

Backward inclined aerofoil blades

Radial blades