How ventilation can help to combat spread of the virus

Nottingham (UK): As the new academic year gets underway, there is understandable concern over how to curb the spread of COVID in schools. Air-quality specialists in Australia have recommended that air purifiers with high-efficiency particulate air (Hepa) filters be installed in all classrooms.

The Welsh government, meanwhile, has set aside 6 million for air technologies – specifically, carbon dioxide sensors and ozone disinfection machines. Although, implementing ozone disinfection machines is currently on hold, pending evidence to support their use.

This raises several questions. What are these different air cleaning technology options? What can they do that opening a window can’t? And how important is ventilation in curbing the spread of COVID?

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