Answer :

Backward curve fan has a non overloading characteristic simply because the pressing changes in static pressure do not overload the motor.

What is centrifugal fan?

A centrifugal fan means a kind of a mechanical device for moving air or other gases in a direction at an angle to the incoming fluid

A centrifugal fan has some key characteristics such as low noise level and small air flow with a high increase in static pressure

So therefore, backward curve fan has a non overloading characteristic simply because the pressing changes in static pressure do not overload the motor.

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