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A comment on AirGradient: DIY Air Quality Monitoring with Open-Source Hardware & Firmware. Parent comment

Re:AirGradient: DIY Air Quality Monitoring with Open-Source ... by ahaucnx on Wednesday May 12, 2021 @12:37AM (#27126640)
Yes, often when you seal your house to keep PM2.5 low, your CO2 values go up.

We measures this in classrooms [1] and I also wrote about the benefits of positive pressure systems to have near zero PM2.5 and low CO2 at the same time [2] even on heavily polluted days.

[1] https://www.airgradient.com/resources/we-measured-the-co2-le...

[2] https://www.airgradient.com/resources/positive-pressure-syst...

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Re:AirGradient: DIY Air Quality Monitoring with Open-Source ... by metb on Wednesday May 12, 2021 @05:52AM (#27128501)
Are the CO2 levels mentioned in [2] above from an air conditioned room? This detail is not mentioned in the article. I am trying to understand if air exchange provided by the air conditioner makes any difference on reducing CO2 levels in the room.
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