The installation of centrifugal fan has four main types according to the outlet angle: 0-degree, 90-degree, 180-degree and 270-degree.

The installation mode of fan can also make other outlet angles according to user's needs.

The rotating direction of centrifugal fan is divided into CW and CCW according to the rotating direction of impeller. From the driving side of the fan, that is, from the wire end of the centrifugal fan driven by external rotor motor, from the pulley side of the belt-drive centrifugal fan, from the motor side of the shaft-drive centrifugal fan, the clockwise direction of impeller rotation is called CW, and the counter-clockwise direction of impeller rotation is called CCW.

Direct-drive centrifugal fans with external rotor motor：Facing the wire end of the fan, the clockwise direction of impeller rotation is called CW, and the counter-clockwise direction of impeller rotation is called CCW.

Belt-drive Centrifugal Fans: facing the fan pulley, the clockwise direction of impeller rotation is called CW, and the counter-clockwise direction of impeller rotation is called CCW.

Shaft-drive centrifugal fans: Facing the motor, the clockwise direction of impeller rotation is called CW, and the counter-clockwise direction of impeller rotation is called CCW.

The default rotation direction of our centrifugal fans is CW. If users want different rotation directions, They must put out clearly at the time of ordering.