4x merv 13 filters. A fan. Now you have yourself a high performing air purifier. | Hacker News

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		bjoli on Aug 25, 2024 \| parent \| context \| favorite \| on: Study: Air purifier use at daycare centres cut kid... 4x merv 13 filters. A fan. Now you have yourself a high performing air purifier.

ceejayoz on Aug 25, 2024 [–]

Yup. We have several of these running. Helps with allergies and when one of us got COVID the rest did not.

https://en.wikipedia.org/wiki/Corsi%E2%80%93Rosenthal_Box

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