I've published a detailed intro to CO2 monitoring.
- How to use it
- What it tells you
- What levels should be
- Limitations you need to be aware of
- Gauging risk for airborne disease transmission
https://itsairborne.com/intro-to-monitoring-co2-20f191dd8f60
Intro to CO2 Monitoring - It’s Airborne

CO2, or carbon dioxide, is a gas that is found in the air. Measuring CO2 can help assess indoor air quality. The concentration of CO2 outdoors is typically around 420 parts per million (ppm) or…

It’s Airborne
@joeyfox "only relate to the direct exposure to CO2 and do [not?] imply acceptable indoor air quality"