A series of experiments triggered by a phenomenon that doesn't comply with the theory Theoretically, for the same filter, the higher the airflow, the lower the filtration efficiency. However, our engineers found in the testing process, when the velocity of the wind is high to a certain value, the filtration efficiency no longer follows the rule of decreasing with the increase in air volume, but increases with the increase in air volume. Later on, after we checked the related information from many sources, as well as communicated with the professionals in the industry and analyzed them, we considered the following possible reasons: 1) When tested in higher air volume, the filter element strength is not enough, the structure is damaged. 2) Filter materials with high filtration efficiency under high air volume do exist.
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