We can't just say one filter level is better without considering these factors. The best filter level strikes a balance between filtration efficiency and the airflow rate drop due to the pressure drop from the filters. (4/7)
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I conducted a test on the 3Pro model, which achieved the highest CADR with E11 filters. While this may not apply to all air purifiers, for PC fan types, E11 filters are the most effective choice.(5/7)
I don’t believe H13 can provide the highest CADR in any case. H13 filters are ideal for devices like biosafety cabinets, where maximum single-filtration efficiency is required, but not for conventional air purifiers. (6/7)
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