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A comment on Ceiling Air Purifier. Parent comment

Re:Ceiling Air Purifier by jefftk on Friday June 03, 2022 @10:37AM (#31608893)
The filters are MERV-14, not HEPA, so they're much cheaper ("materials for one fan are nine MERV-14 filters for $110"). See https://www.jefftk.com/p/merv-filters-for-covid for why MERV-14.
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