Unfortunately no air-con in the rooms.
So during my stay, where it has been very hot outside, it also was much too warm inside (in the room)!
The windows only have curtains - but since the street is a rather busy street, it would improve and reduce the noise level, when the hotel rooms pointing towards the "Rothenbaum Chaussee", when these would be equipped with either oustide window blinds, or window shutters.