Centrifugal/Axial Fans

Centrifugal and axial fans are essential components of forced air circulation systems that create airflow through different aerodynamic principles. Centrifugal fans use rotating impellers to accelerate air radially outward, creating higher pressure differentials suitable for ducted systems with resistance. Axial fans use propeller-like blades to move air parallel to the shaft axis, providing high volume flow at lower pressures. Within forced air circulation systems, these fans serve as the primary air-moving elements that overcome system resistance to maintain required airflow rates for heating, cooling, ventilation, or process requirements.

Centrifugal fans operate by drawing air into the center of a rotating impeller, where centrifugal force accelerates it radially outward into a scroll-shaped housing, converting kinetic energy to pressure. Axial fans work by propeller blades creating a pressure differential along the axis of rotation, with air moving parallel to the shaft through minimal directional change. Both types convert motor rotational energy into air movement, with centrifugal designs excelling at pressure generation and axial designs at volume flow.