

Ventilation is very important to keep the air inside breathable and to keep things like mold outside.
I like to show the importance of this by lighting some incense (or vaping a bit) to show how the smoke just does not go away with the window closed. The same happens with the CO2 that comes out of your mouth, you just don’t see it in that case.
Exceptions would be when your building has some other ventilation system built in, but the smoke would show that.
Overhere I always have some form of ventilation open (our house has these ventilation thingies above the windows, that I get angry about when my partner closes them).




Hehe
Also, Linux is really quite nice nowadays 😉