None of the bedrooms had windows it was possible to open, and only one of the bedrooms had ventilation in the wall. Consequently, the other bedroom did not get fresh air and we had to have the door to the living room open to get oxygen into the room during the night. If we had opened the window in the living room to get fresh air, the whole apartment would have been cold in the morning, as the heating was limited/slow. All in all, we slept very bad in this bedroom.