Then...install an air conditioning unit.
Your flat didn't have them because you'd be expected to buy them yourself. That's quite normal in Poland
not to repeat myself but......???......that's......correct.
I can think of several in Poznan. Perhaps you simply didn't look in the right places?
yes....why yes of course. 4 years, was looking in the wrong direction the entire time.
I'll take pictures of bug screens in/around the Rynek for you.
better yet, visit 100 flats, at random, throughout the city, and see if they got 'em. get back to me on your results. you know.....because that would pertain to the point I was making.