At AirGradient we are specialized in measuring indoor air quality in schools and monitor thousands of classrooms in real-time for CO2, PM2.5, temperature, humid

At AirGradient we are specialized in measuring indoor air quality in schools and monitor thousands of classrooms in real-time for CO2, PM2.5, temperature, humidity and TVOCs. We do see very similar CO2 ranges in our data as presented in this study and observe the best results in modern schools buildings with demand constrolled ventilation linked to specific indoor air quality targets [1]. The schools that we monitor that have the best indoor air quality often use positive pressure systems with high performance HEPA and carbon filters [2]. We encourage schools to be transparent about their data and share it with the community as this encourages discussion and lays the base for continous improvements. Some schools now publish real-time data on air quality on their website together with an explanation why healthy indoor air quality is so important for students. Here is a good example of a well done air quality webpage of a school with real-time data [3]. If you want to know more about the air you breath and build your own monitor - either yourself or with students- we maintain a popular open source air quality monitor project [4]. [1] https://www.airgradient.com/open-airgradient/blog/we-measured-the-co2-level-in-a-classrooms-this-is-what-we-found-out/ https://www.airgradient.com/open-airgradient/blog/we-measure... [2] https://www.airgradient.com/open-airgradient/blog/air-purifier-vs-positive-pressure-fresh-air-system-an-unfair-battle/ https://www.airgradient.com/open-airgradient/blog/air-purifi... [3] https://ptis.ac.th/aqi-at-prem/ https://ptis.ac.th/aqi-at-prem/ [4] https://www.airgradient.com/open-airgradient/kits/ https://www.airgradient.com/open-airgradient/kits/