The issue is that Switzerland outlawed air conditioning for private homes (still allowed in shopping centres though!)
I know of a bunch of people who legally purchased and installed aircon in their homes.
https://archive.is/7g3A9
Yeah you can buy the mobile AC unit, but none of the new-builds in the past 10+ years come with a built-in (fixed) unit.
The issue is that Switzerland outlawed air conditioning for private homes (still allowed in shopping centres though!)