Today, as many people are starting to head back to offices, schools, and other public spaces, concerns about whether the COVID-19 virus can be transmitted through HVAC ventilation is at an all-time high. The truth of the matter is—we don’t know for sure. There is little data available that demonstrates whether COVID-19 as an airborne virus can or cannot be transmitted through ventilation. We do know, however, that other airborne viruses are capable of moving through ventilation, so why not COVID-19?