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https://vav.fi/wp-content/uploads/2018/10/ilmanvaihto.jpg1024480Well-functioning ventilation ensures a fresh air supply to your apartment. The purpose of ventilation is to remove impurities arising from normal, everyday activities and bring in fresh replacement air from outside. Ventilation works in such a manner that bad air is transported out, primarily through the kitchen, bathroom and walk-in closet. Fresh replacement air enters […]