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  1. immigrant

    Air flow exceed rated CFM for HEPA filter

    Hi, We have installed HEPA filter 24x24x12" in the duct. This filter is rated for 2000 CFM, but we have actual 3800 CFM air flow at this point. The filter is collapsed for some reason. My question is, if it is happen due the exceeding CFM or no? Does somebody have an experience. Yury
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