React quickly to “humidity peaks”: How to ventilate the kitchen properly. In winter, the rooms should be ventilated at values between 50 and 60 percent.
If there is no extractor hood, the fine grease particles settle on kitchen cupboards, curtains or kitchen appliances. A sticky grease film is created that is difficult to remove. The Federal Environment Agency recommends closing the kitchen door when cooking. This means that the steam does not spread into the adjacent rooms.