(akz-o). Whether it's a new building or an extensively modernized old building - for reasons of energy efficiency, not only the thermal insulation but also the tightness of the building is optimized these days. If people do not ventilate sufficiently, this has a negative impact on indoor air quality. Breathing and fumes from furniture, cleaning products and cigarettes can lead to high concentrations of CO₂ and volatile organic compounds (VOCs) in the house. Then there is a risk of headaches, fatigue, susceptibility to infections or allergies and eye irritation. If the humidity becomes too high due to sweating, cooking, showering and drying laundry, this can even lead to the risk of mold forming. Experts therefore recommend ventilating three to five times throughout the day for five to fifteen minutes, depending on living habits and the room. Ideally, you can ensure there is a draft with windows wide open on several sides of the apartment. However, it is obvious that this is hardl...
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