Re:DIY Positive Pressure Suit
by Johnny555 on Sunday March 22, 2020 @10:36PM
(#22660764)
That's a different argument -- whether or not the HEPA filter really is a HEPA filter.
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And whether the seal around the HEPA filter that the HEPA filter is put inside is airtight.
E.g. I've seen some vacuum cleaners which have HEPA filters reviewed as a bit useless at filtering because the particles flow through small gaps around the filter.