Every meeting room in our office building has a little meter in it which rotates through displaying three different measurements: temperature, relative humidity

Every meeting room in our office building has a little meter in it which rotates through displaying three different measurements: temperature, relative humidity and CO2 ppm. Most of my colleagues are surprised when I point this out to them. The floors of our office that I sit in has two sizes of meeting rooms: one for eight/nine people and one for three people. Free meeting rooms are scarce during regular hours, so sometimes we cram in to three-person room. It's fun watching the CO2 measurement climb from 800 to 1400. Supposedly 400 ppm is outdoors, 800 ppm is indoors and anything higher is a little unusual. I have fun pointing out the reason why we are all feeling sleepy and docile towards the end of a meeting is because of the CO2! See also: https://www.nytimes.com/2019/05/06/health/conference-room-air.html https://www.nytimes.com/2019/05/06/health/conference-room-ai...