Harvard and Virginia Tech experts share their research on ventilation and filtration in this Wall Street Journal video posted on Nov. 23, 2020. Graphs and other data support important indoor air quality studies to prevent the spread of air-borne contaminants in public buildings and homes.

One point we disagree on: ASHRAE does provide guidance on recommended levels of outside air. See Priority Energy's article on ASHRAE's COVID-19 Building Preparedness.