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A comment on Dyson air purifier outperformed by cheap DIY box fan filter in Marketplace test. Parent comment

Re:Dyson air purifier outperformed by cheap DIY box fan filt... by ska on Thursday February 11, 2021 @01:15PM (#26105098)
I'm pretty sure there aren't any reusable HEPA filters regardless of vendor.

Lots of units will have a washable pre-filter, but that's to pick up big stuff and extend the life of the disposable part.

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Re:Dyson air purifier outperformed by cheap DIY box fan filt... by qwertay on Thursday February 11, 2021 @06:42PM (#26109059)
Dyson suggests replacing the filter every year but you could vacuum off the dust on the outside. Their vacuum cleaner filters are washable which is probably where OP got the idea.
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