Comment by Karawebnetwork
2 days ago
The high school my friend's kids attend installed CO2 sensors during the pandemic as an indirect way to measure airflow.
It turned out the building had been sealed extremely tightly to keep out the winter cold and because it is old, it does not have a proper HVAC system.
They discovered that CO2 levels stayed around 1200 ppm throughout the entire winter, sometimes even higher. This had likely been the case for decades.
It is a school in a small, low‑income town. I cannot help wondering how many kids were labeled as underperforming when they were actually struggling with the effects of chronically elevated CO2 levels.
I went to a Catholic school and had to attend services. I thought that I was just bored, but I'm pretty sure that my yawning had more to do with elevated CO2 levels.