>>2698
It's the same limits in Germany actually, for a long time nobody gave a damn but since Corona-Chan came, CO2 is actually measured and it turned out in classrooms values above 5000 ppm are frequently reached. This was recently amplified by telling people never to open windows in winter because saving energy and muh climate change, children on the Maledives are drowning if you don't save energy. Good thing we have a superior air exchange system at work as it's a new building and it automatically keeps CO2 levels below 1000 ppm.

Dunno where you have to work to reach 30K ppm CO2, maybe in an old submarine, coal mine or wine cellar.