What Are Centrifugal Fans? | Industrial Fans & Blowers Guide

22.04.2025

Centrifugal fans are a vital component in industrial ventilation systems, designed to move air or gases efficiently by converting rotational energy into airflow. Unlike axial fans, which push air along the axis of the fan, centrifugal fans use a rotating impeller to draw air into the centre and then expel it at a 90-degree angle through centrifugal force.

How Do Centrifugal Fans Work?

Centrifugal fans consist of several key components:

• Impeller (or fan wheel): Blades that rotate to accelerate air outward.
• Housing (scroll or volute): Directs airflow from the impeller into the ductwork.
• Inlet & Outlet: Air enters through the centre and exits perpendicular to the intake.

As the impeller spins, it pulls air into the fan's centre and then flings it outward by centrifugal force. The design allows for higher pressure development than axial fans, making them suitable for applications requiring air to travel through ductwork, filters, or resistance-heavy environments.

Types of Centrifugal Fans

Centrifugal fans come in several blade configurations, each suited for different needs:

• Forward-curved blades: Ideal for low-pressure, high-volume applications with quiet operation.
• Backward-curved blades: Offer higher efficiency and are better for medium to high-pressure systems.
• Radial blades: Rugged and suitable for handling particulates or harsh gases.

Advantages of Centrifugal Fans

• Higher Pressure Output: Better suited for ducted systems or high-resistance environments.
• Durability: Often used in dusty, corrosive, or moist environments due to their robust construction.
• Directional Control: Airflow is redirected at a right angle, making it easier to fit in specific layouts.
• Noise Control: Certain designs, such as backward-curved models, can operate more quietly than axial fans in the right settings.

Common Applications

Centrifugal fans are widely used across industries for:

• HVAC systems
• Industrial process ventilation
• Dust collection
• Fume and smoke extraction
• Cleanroom and laboratory exhaust

Learn about other uses for this fan by clicking here!

Why Choose Centrifugal Fans?

Centrifugal fans are ideal for environments where airflow must overcome resistance from filters, long duct runs, or equipment. Their adaptability and reliability make them a go-to solution for many industrial and commercial ventilation challenges.

You can trust Centrifugal Fans

Understanding what centrifugal fans are—and how they differ from other types—is essential when designing an effective air movement system. Whether you're planning a ventilation upgrade or need a reliable fan for industrial use, centrifugal fans offer durability, control, and performance you can trust.