As one of the leading authorities on HVAC, the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) has issued numerous recommendations to help businesses navigate the ongoing threat of airborne transmission of COVID-19 through their HVAC systems.

In theirPosition Document on Infectious Aerosols, ASHRAE reminds readers, "The risk of pathogen spread, and therefore the number of people exposed, can be affected both...