1. The structure of centrifugal fan is more complex than axial-flow fan.
2. The direct of medium in blast pipe be changed. But it not be changed about axial-flow fan.
3. The connection is different ,the centrifugal fan connect by axial and the axial-flow be installed internal of it;
4. The place of installing is different, the centrifugal fan be installed on the gate of air outlet or of air intake. Just as air condition. But the axial-flow fan always be installed inside of blast pipe.