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by ahaucnx
1615 days ago
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Yes I agree. Often there is also the dilemma if you live in a polluted area and have purifiers in the classrooms. Opening the windows will reduce CO2 but increase PM2.5. Not opening will lead to lower PM2.5 but high CO2. Here in Asia in highly polluted areas, positive pressure systems are getting more and more popular at home as well as in classrooms[1]. [1] https://www.airgradient.com/resources/positive-pressure-syst... |
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