Centrifugal fans are apparatuses that draw in air and expel it in another direction. They use impellers to suck in air, gasses, smells, and other airborne particles and use propelling blades to blow and disperse air to a different area. Centrifugal fans are typically rounded in shape with an intake on one side and a blowing vent on an adjacent face. Given their design, they are often colloquially called snail fans.
Centrifugal blower fans are usually found in factories or other industrial settings as they serve more heavy duty purposes. Some appliances may have a self-contained centrifugal fan to aid with cooling or exhaust, though there are stand alone models that can be moved around to distribute air from a particular area. Other times they are part of an air duct system where air is passed through a centrifugal exhaust fan.
RS carries centrifugal fans in a wide range of sizes and speeds to fit any job requirement. We carry fans from leading brands, such as RS PRO, and popular models such as the Fantech Inline Fan.
Understanding centrifugal fans is a lesson in physics. The centrifugal fan's impeller blades draw air by creating a vortex. The air that is sucked into the impeller blades continues to rotate now around the center of the fan and pushes outwards inside the fan duct until the air is shot out of the exhaust vent. This phenomenon is called centrifugal force, hence the name of the fan.
The speed and power of airflow are measured in cubic feet per minute, or CFM. Fans are often categorized by CFM as engineers will know how much power their system needs. Higher speed fans are often referred to as blower fans.
Blower fans earn their distinction because their primary function is to powerfully blow air in a specific direction. Safety officers or maintenance professionals may use blower fans to quickly disperse gas or fumes or to dry an area after a spill.
Blower fans have a lot of practical applications outside factories and other industrial settings. Machines like leaf blowers and snow blowers, staple pieces of equipment for many households across the world, are in essence just high-powered blower fans with an exhaust attachment.