What is the definition of a plug fan? A plug fan, also known as an axial flow fan, is a type of fan that uses an electric motor to draw air in and out of an enclosure. The fan blades, or blades of the impeller, are set in a straight line, usually parallel to the direction of airflow. This type of fan is commonly used in industrial and commercial applications such as HVAC systems, air handling systems and ventilation systems. Plug fans are known for their excellent efficiency and quiet operation. They are also relatively inexpensive and easy to install.
Plug fans are designed to move a large volume of air at relatively low static pressures. This makes them ideal for applications where the pressure drop across the fan is not a critical factor, such as in general ventilation systems. They are available in a wide range of sizes, from small sizes used in electronic equipment to larger sizes used in industrial applications. The impeller blades of a plug fan can be made