Boxfan Filters for Covid-19 Also Reduce Indoor PFAS and Phthalates (pubs.acs.org) 1 points by kalimanzaro 3y ago ↗ HN
[–] chiefalchemist 3y ago ↗ Does anyone have a link to a How To (written or video) on doing this? Yes, I'm sure there are loads. I'm asking HN to avoid the noise.
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