No ventilation at all - very stuffy in the room. The air-conditioning did not work at all. When we complained, reception simply told us air-conditioning is not available in this season. But they gave us no warning when we checked in, and clearly it wasn't just the lack of air conditioning - no air was coming out from the air vent at all. We could open the window, but the street noise made it impossible to sleep. We booked 2 rooms, and we all had the same problem. I've never left such a bad review, but do not book this hotel.