Excellent chart giving pros and cons of different air cleaning techniques. This should be distributed to every school administration so that they can adequately assess what they are purchasing.

Excellent chart giving pros and cons of different air cleaning techniques. This should be distributed to every school administration so that they can adequately assess what they are purchasing. It is pretty hard to go wrong with fans and filters. https://t.co/8elGBBCgTi

— Jim Rosenthal (@JimRosenthal4) September 20, 2022