Why does Xiaomi recommend replacing the filter of the air purifiers every 6 months, even though the lifespan of HEPA filters is 2-3 years?

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    Lv 7
    2 months ago
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    The lifespan of a filter is not predictable.    

    If you replace one too soon, you will waste some of its usefulness. 

    Too late, and it will restrict air flow and not do all it could for that reason. It's up to You to figure out when your filter is due for replacement. 

                 

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