Response from Evin:
There are three differnet warming system in the flat 1-Radiators with gas 2-Aircondition 3-Extra heaters. In case one of them does not work, other two works absolutely. It is impossible to be without heating in the flat within 3 system. Radiators had a permanent problem but now it is sorted as well. I also dont understand why guests write review about stairs. It is clearly mentioned at the flat description that it is on the fifth floor and NO ELEVATOR!.