(1)In most cases, the lower the wind speed, the better the filter will work.

(2)For high-efficiency filters, if the wind speed is reduced by half, the dust transmission rate will be reduced by an order of magnitude (the efficiency value will be increased by 9), and if the wind speed is doubled, the transmission rate will be increased by an order of magnitude (the efficiency value will be reduced by 9).

(3)For high-efficiency filters, the speed of airflow passing through the filter material is generally 0.01-0.04m/s, and within this range the resistance of the filter is proportional to the filtered air volume. If a filter with a rated air volume of 1000m3/h has an initial resistance of 250Pa, but when the actual air volume is only 500m3/h in use, its initial resistance can be reduced to 125Pa.

(4)For general ventilation filters, the speed of airflow passing through the filter material is in the range of 0.13-1.0m/s. The relationship between resistance and air volume is no longer linear, but an upward arc. When the air volume increases by 30%, the resistance may increase by 50% %.

(5)Filter resistance is a very important parameter, don't forget to ask the filter supplier for air volume-resistance curve.