I’ve heard this usually described as a German custom “lüften”, conveniently in line with Covid guidance. Would be interesting to see a world map of daily clear

I’ve heard this usually described as a German custom “lüften”, conveniently in line with Covid guidance. Would be interesting to see a world map of daily clear-the-air adoption. I hadn’t heard of it before this year. https://welcometogermerica.com/2018/12/how-to-air-out-a-room-like-a-german.html https://welcometogermerica.com/2018/12/how-to-air-out-a-room...