Inline duct fans work by drawing air into the fan and then pushing it through the ductwork. The fan blades rotate at high speeds to create a vacuum that draws air in, and the centrifugal force of the spinning blades pushes the air out through the ductwork.

Inline duct fans offer several benefits, such as increased airflow, improved air quality, and reduced energy consumption. They are also relatively quiet and easy to install.

Centrifugal inline duct fans use a spinning impeller to create airflow, while axial inline duct fans use a propeller-like blade. Centrifugal fans are more powerful and can move air over longer distances, while axial fans are more efficient and quieter.

To choose the right inline duct fan for your needs, consider the size of the ductwork, the airflow you need, and the noise level you can tolerate. It is also important to choose a fan that is compatible with your ductwork system.