What can you do?
When you open the windows to air out your home, the stale air is exchanged with fresh air within 5-20 minutes, especially if you make use of the stack effect.
When the outside temperature is 10-15°C or less, humidity will also fall. Even in cold months, the walls, floor and furniture will lose only very little warmth and soon regain their original temperature.
Good indoor air quality helps prevent asthma and allergies and improves your overall well-being and performance.