Yeah, but then they go and open all the windows to "change the air" no matter the weather.

I used to work with a bunch of Germans in the US. I came in to the office one time at about 4:30am in February. One of the guys had all the windows open when the outdoor temperature was something like -20F.

Like Moritz, I think that avoiding the draft is more important than changing the air at that point. 🙄

I also had an old manufacturing guy tell me that drinking cold water in the summer would kill you because of the shock to your system.