We’ve learned many lessons since the onset of the pandemic. Around the globe, vaccination programmes are running and measures are being taken to protect people from the consequences of the virus. But we have also realised that some methods are more effective than others at preventing the spread of disease.
There is a growing consensus that the primary route for COVID-19 infection is airborne. This makes improving indoor air quality and ventilation one of the most effective ways to reduce the risk of coming into contact with harmful pathogens. The number of air changes per hour (ACH) determines whether or not the indoor air is sufficiently filtered with clean air.