While keeping your windows closed all winter may keep your home warm, it also traps mold, bacteria, and allergens inside the house, where they will gradually build and affect your indoor air quality.
To counteract this air quality issue, Germans developed the practice of lüften, which is now used in homes, schools, offices, and other public spaces in Germany. Lüften is even sometimes required by apartment leases in Germany.
Find out what lüften is and discover whether you should adopt this German window practice for your home.
Meet the Expert
Lauren Riddei is a professional Healthy Home Wellness Interior Designer, certified Building Biologist, and CEO of Haus Holistics.
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