Great article, as usual. Readers might also be interested in the DIY air filter system (sometimes known as a Corsi-Rosenthal box, after the inventors) that can be made for around $120 using a box fan, and four 20" MERV-13 air filters. Descriptions and fabrication instructions now available at many sites (google "DIY covid box fan air cle…
Great article, as usual. Readers might also be interested in the DIY air filter system (sometimes known as a Corsi-Rosenthal box, after the inventors) that can be made for around $120 using a box fan, and four 20" MERV-13 air filters. Descriptions and fabrication instructions now available at many sites (google "DIY covid box fan air cleaner"). Data on effectiveness here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8142835/
Great article, as usual. Readers might also be interested in the DIY air filter system (sometimes known as a Corsi-Rosenthal box, after the inventors) that can be made for around $120 using a box fan, and four 20" MERV-13 air filters. Descriptions and fabrication instructions now available at many sites (google "DIY covid box fan air cleaner"). Data on effectiveness here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8142835/
You beat me to it!