Sauna installation in the basement, ventilation, what window size?

Hello, I have a question regarding the installation of a sauna in the basement. Unfortunately, I have not found any solution anywhere on the internet so far.. :-( I want to have a 2x2 m Finnish sauna installed in the basement of my house. However, I am worried about the humidity and the associated mold growth. The basement is about 19 m2 in size, but it only has a very small window - 60x30 cm.. Therefore, my question: Is such a window sufficient for ventilating the room after sauna sessions, or is it too small and not adequate? Thank you very much in advance for your answers! Best regards, Iris

Hello, you don't need to worry about ventilation. Since the sauna in the private area only runs for a few hours, it doesn't cause any problems. If you want to use the classic Finnish sauna anyway, hardly any humidity is generated. It would be a bit different with a steam bath, but also not a dramatic problem. After you have used the sauna, you can simply open the window for a few minutes and that's it. We also have a sauna at home and it works great!

Old House

Hello,
I have the same experience as Jensen in this regard. My house was built in 1970.
I am now building new and of course I can see the exhaust air as well.

Regards
Hausbauer1972