Are these Corsi-Rosenthal boxes legitimate?
YES! Very much so. Here is a short collection of organizations supporting their use in schools:
The White House Clean the Air Initiative (there is even a Corsi-Rosenthal box in the White House!)
There’s a large and growing body of research on the effectiveness of the Corsi-Rosenthal system in removing smoke, dust, pollen, and aerosols from indoor air. Dr. Richard Corsi, Engineering Dean at U.C. Davis, designed the box to reduce the risk of infection from respiratory aerosols that carry Covid, flu, and other viruses. The filters are also highly effective at trapping mold, pollen, and fine particles. Corsi-Rosenthal boxes are a great supplement to the regular HVAC system in any indoor space, helping reduce the buildup of respiratory aerosols that occurs when the room fills with people. These air cleaners are being used by classrooms and in homes across the country as part of an “all-of-the-above” strategy to tackle indoor air pollutants and virus-laden aerosols.