I mean in Mediterranean AC are quite common, further north not so much because hot summer used be 1 week of temperatures +30 deg C which would mean that buying

I mean in Mediterranean AC are quite common, further north not so much because hot summer used be 1 week of temperatures +30 deg C which would mean that buying AC effectively for 1 week per year makes no sense. However if we will start talking about a month or several months of hot weather, people will buy them kind of automatically.