The blade diameter of axial flow fans is limited to the diameter of the shell, while centrifugal fans have no limitations in this respect. They can use forward-leaning or forward-leaning blades to meet wider requirements of air volume and pressure.  And muffler processing can be done inside cabinet, there is very obvious advantage on noise index.  Due to the low number of revolutions of the motor, the motor power is large, and the power consumption phase is more.  If the usual ventilation system, try to use cabinet centrifugal fan, fire exhaust system is not commonly used, the use of high temperature axial flow fan is more economical and reasonable!