Fan

Device for moving air by two or more blades or vanes attached to a rotating shaft. * Airfoil fan: Shaped blade in a fan assembly to optimize flow with less turbulence * Axial fan: Fan that moves air in the general direction of the axis about which it rotates * Centrifugal fan: Fan in which the air enters the impeller axially and leaves it substantially in a radial direction * Propeller fan: Fan in which the air enters and leaves the impeller in a direction substantially parallel to its axis