Most Americans don’t “get” how much further north Europe is than America. Being that far north lessens the (regular) need for air conditioning.
The southernmost point in continental Europe is about the same northerly latitude as Tusla, Oklahoma is. The tropical paradise of Minot, North Dakota is about as far north as Paris is. The average hottest day of the year (in Paris) is 77F.
I’ve been in Paris IN JULY and stayed in a hotel with NO AIRCON. And I can’t say I missed it (did sleep with the windows open). But they do periodically have heat waves that kill off a few of the old and infirm.
Inverness, Scotland, is north of Moscow, Russia. I’ve been in the Highlands in July and never took of my long wool underwear (except to bathe), even when I slept. And wore a heavy wool sweater and an anorak whenever I went outdoors.
Get very far north of the Mediterranean and Europe is colder than a well-digger’s bum.
And there are no screens in the windows.