The Homemade Air Purifier That’s Been Saving Lives During the Covid-19 Pandemic
Made from everyday items found in hardware stores, the Corsi-Rosenthal box is a
testament to the power of grassroots innovation
Douglas Hannah, The Conversation, Smithsonian, March 7, 2022
[www.smithsonianmag.com]

DIY box fan filters – Corsi-Rosenthal box
[cleanaircrew.org]

IAQ Research-Practice in Action: The Corsi/Rosenthal Box Air Cleaner
[www.texairfilters.com]

Yours,

Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)