「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?
AbouBenAdhemI have sensors that let me know when the outdoor temperature and humidity are both better than indoors so I can open the windows. Typically that’s an hour or two a day in the winter when the weather is nice, and most of the day in the summer.