Inline duct fans are widely used in residential buildings, commercial facilities and auxiliary industrial ventilation systems. Installed directly within the ductwork, they support supply air, exhaust air, local ventilation and equipment cooling.
When selecting a centrifugal fan, airflow, static pressure, efficiency and noise are usually the first parameters considered. Impeller material, however, is often reduced to a simple assumption: metal is stronger, while plastic is lighter.
Cross-flow fans, also known as tangential fans, typically use a long cylindrical impeller. Air enters the impeller radially, passes across its interior, and then flows through the blades a second time before being discharged. This creates a broad, relatively uniform airflow pattern across the length of the fan.
