Ventilation and pest prevention methods for colder seasons

As temperatures drop, experts recommend specific indoor maintenance strategies to manage air quality and prevent pests. In Germany, the practice of ‘Stoßlüften’—short, intense ventilation—is advised to refresh air without significant heat loss. The advisory organization co2online and the German Environment Agency (Umweltbundesamt) suggest opening windows wide for a few minutes several times a day. Recommended durations vary by season: approximately five minutes in winter, ten minutes in November and March, 15 to 20 minutes in October and April, and up to 30 minutes during summer. This method prevents moisture buildup and mold on walls, which can occur if windows are left cracked open for extended periods.

Simultaneously, falling temperatures drive insects like the invasive stink bug to seek warmth indoors. To prevent infestations, it is recommended to seal cracks around window frames, doors, and roller shutter boxes with silicone or sealing tape. If an insect is found, experts advise against crushing it, as this releases a persistent odor; instead, it should be carefully removed with paper or placed in a jar with soapy water. Maintaining mosquito nets through the autumn can also serve as a barrier against entry.