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Monday, September 5, 2022

How to build Corsi-Rosenthal Box to protect against COVID for under $100 #COVIDisAirborne

Life in many places has largely returned to a pre-pandemic normal. People are tired of masking and remaining socially distant, even though contagious COVID-19 variants show no signs of going away anytime soon.

With attitudes toward COVID-19 becoming increasingly lackadaisical, public health experts are touting ventilation as a less-intrusive way to stop tiny particles carrying the virus from traveling through the air. But uptake of better ventilation practices — which can range from expensive to unrealistic — has been slow.

Enter the Corsi-Rosenthal Box, a do-it-yourself air filtration system that has taken the internet by storm. Each box typically costs under $100 to make and is more effective than other, pricier options like High Efficiency Particulate Air filters.

The simple contraption consists of a box fan, four MERV13 furnace filters that can be purchased online or in store, some cardboard and strips of tape. It’s the brainchild of air quality researcher Richard Corsi, dean of engineering at the University of California, Davis, and Jim Rosenthal, CEO of Texas-based company Tex-Air Filters...

How to build Corsi-Rosenthal Box to protect against COVID for under $100 | The Seattle Times

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