The exterior wall is built with a 36cm thick Poroton. Then plaster. That’s it. No additional insulation. The house was built at the end of 2013, so 3.5 years ago.
ok, I thought that this wall construction was already installed 30 years ago.
Provided that [Kontrollierte-Wohnraumlüftung] stands for ventilation: This does not exist.
It was done too, however a lot has changed with the bricks since then... ;) Parents built like that 30 years ago, we do now too. It is comparable to a car from 30 years ago versus a new car.