Upon arrival a window was left wide open and the apartment was freezing. (1-2 degrees Celsius outside) We closed it and none of the radiators were working, the host left 2 space heaters which barely helped. We left for a few hours, came back and it was still just as cold, then we discovered the two skylight windows in the kitchen and bathroom were also left open a crack. This is ridiculous that in such cold weather they were left open without even leaving a warning for the guest to close them.