Ventilation in Classrooms

CNN Online published an article entitles: "This invisible Covid-19 mitigation measure is finally getting the attention it deserves", https://edition.cnn.com/2022/04/10/health/covid-19-ventilation-matters-wellness/index.html discussing the merits of ventilation in indoor spaces. It's a USA perspective, as it refers to HVAC systems and filtration being able to remove harmful particles from the circulating air. In the context of South Africa where I know of not one school having any form of HVAC system, this leaves little option but to look more closely at "ventilation".
The article references Joseph Allen - Healthy Buildings Program at the Harvard T.H. Chan School of Public Health, which says: 
"If I'm smoking in the corner of a classroom and you have low ventilation/filtration, that room is going to fill up with smoke, and everyone is breathing that same air." and goes on the further say "Everybody in a room together is constantly breathing air that just came out of the lungs of other people in that room. And depending on the ventilation rate, it could be as much as 3% or 4% of the air you're breathing just came out of the lungs of other people in that room,"

"We spend 90% of our time indoors. The air we breathe indoors has a massive impact on our health..."

With these facts in mind, you would think that there would be volumes written about air quality in school classrooms in South Africa, especially bearing in mind that classes can have 30 or more learners at any given time.

As we enter a South African winter, it becomes important to consider classroom ventilation. It's an issue that Suntricity has been discussing internally for some time and we are presently busy trying to understand how we can launch some kind of campaign on capturing data of CO2 levels in classrooms, which will help us to be more aware of indoor air quality.