The air volume of the centrifugal cooling fan depends on the impeller diameter, design and speed. Fans with large diameter impels and backward curved blades, such as quiet centrifugal fans and 12v centrifugal fans, usually deliver more air, plastic centrifugal fan is suitable for efficient operation due to their light material, while brushless centrifugal fans provide longer life and stability. These factors should be considered comprehensively when selecting to ensure the best air volume and silence effect.