The COVID-19 pandemic has highlighted the importance of Indoor Air Quality (IAQ) to the health and welfare of building inhabitants. Insufficient air filtration and ventilation have proven to increase the risk of airborne viral transmission in closed spaces. While the need to improve IAQ has always been a public health priority, it is now an urgent necessity with far reaching economic and employment impacts. To ensure the safe operation of buildings, improvements to ventilation and air filtration systems need to be put in focus.