I side with you and can share another crazy story:

Between 2018 and 2020, I lived in a newly built, 90-square-meter rental apartment in Germany. It was luxurious, had a fire-rated door, and was very well soundproofed as well as equipped with a very spacious bathroom and walk-in shower.

What made it sadly special was its so called thermal design concept: thanks to a natural air circulation system, the heating could only reach a maximum of 19 degrees in the winter. That’s how the system was designed and specified. The walls very well insulated, but there were slits that connected the rooms to the outside world to allow for air exchange. Not large or long ones, here and there hardly noticeable.

It’s crazy how restrictive the legal regulations are. So the 20-degree limit is by no means just a matter of perception—quite the opposite. As a consequence we placed electric heaters in almost every room. What a farce...