[cedex12]

Related question:

What's the best way to ventilate an old european house during winter?

I've taken up the habit of letting my bedroom windows (slightly) open at nighttime to have fresh air while sleeping. I'm unsure this is really wise ecologically since outside air == cold air, but at the same time, there is no other way to get fresh air…

Any tip, or, better, professional opinion?

[isbn]

https://www.lunos.de/products-from-lunos/e%C2%B260

https://www.youtube.com/watch?v=VuTV_6-igC0

[cedex12]

That's interesting. Thank you!

[KozmoNau7]

Low tech method: air out heavily for 5-10 minutes, 2-3 times per day, ie. when you get up, when you eat lunch and just before going to bed. Open all windows and all internal doors, really get the air moving. Because you're airing out so intensely for a short period of time, the furniture and walls don't cool down, so the air warms up quickly afterwards.

[cedex12]

Good idea, thanks!