I've had one of these for years with MERV10-12 (depending on availability) filte... | Hacker News

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		dylan604 on Feb 11, 2021 \| parent \| context \| favorite \| on: Dyson air purifier outperformed by cheap DIY box f... I've had one of these for years with MERV10-12 (depending on availability) filters. This is in addition to the 20x25 filter in the central unit. Judging by how dirty the filter on the box fan gets, it is amazing how the central unit is just unable to do an adequate job.

Rebelgecko on Feb 11, 2021 [–]

Does your central air also use a merv 10 filter? A lot of people use the cheap fiberglass ones which are not very effective

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