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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 DoingIsLearning on Thursday February 11, 2021 @01:48PM (#26105532)
This could be a HN submission in it's own right. Really interesting 'home' science.
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