@nprofile1q... not sure if they sell it in Europe but they have AC units that also heat the entire house too so buying one like that wouldn't be a waste because you'd use it year round.

And I know installing AC is a pain but remember the Japanese are disappointed in Europeans for not having ac.

But realistically if you are able to you could probably pay someone to install it. Which would only take around an hour or two to install at Max.