HVAC systems provide heating, ventilation, and air conditioning to millions of buildings, however in the age of the Covid-19 pandemic, these systems also pose a serious health risk. Many HVAC systems lack proper air exchange, instead recycling old air. Consequently, if infected droplets enter the system, the virus circulates throughout the area, potentially widening its spread and infecting more individuals. This is an issue considering HVAC systems are used widely across Massachusetts and the entirety of the United States in both large and small establishments.  The Center for Disease Control (CDC) and World Health Organization (WHO) state that the virus is mainly transmitted through droplets or occasionally when an individual comes in contact with an infected surface and then touches […]