「黃家駒 Wong Ka Kui」 | (aka: 鳳凰院 凶真 Hououin Kyouma)How often are your windows open? What about during Winter? or during Summer? Do you open windows to let in fresh air?
Twongo [she/her]As soon as the air feels stale you gotta turn off your heating and open all windows for like 5-10 mins in the cold seasons. Air is bad at carrying heat anyway, if you close your windows it’ll get warm again quickly.
German “Stoßlüften”