Jim Rosenthal ’70 co-invented the Corsi-Rosenthal box air filter, a practical, low-cost, and award-winning tool for helping to mitigate Coronavirus transmission. The apparatus includes five filters and a box fan. Rosenthal is a co-founder of Air Relief Technologies Inc., the parent company of Tex-Air Filters. He has been in the air filtration industry since 1997 and frequently contributes to industry and professional publications on filtration, indoor air quality, and environmental controls for allergy and asthma.

Andrea Bruder, chief public health advisor to the president at Colorado College, built five of the Corsi-Rosenthal box DIY filters over a weekend in January for CC offices and departments.