Centrifugal blowers provide a steady volume of air to supply energy-efficient pressure or vacuum. Air enters at the center of a spinning impeller, and is divided between the impeller’s vanes. As the impeller turns, it accelerates the air outwards using centrifugal force. This high-velocity air is then diffused and slowed down in the surrounding blower housing to create pressure. The pressure or vacuum offers a wide range of volumetric flows possible due to the geometry of the open impeller.