Internacional (Marketwired, 06 de Septiembre de 2013) Stale air, lingering odours and high humidity can happen in the best of homes and sometimes, simply opening a window can bring relief. When it's mild outside and there is a breeze, opening a window can be beneficial. However, in Canada's hot and cold climate this is not always practical or possible. Leaving a window open in mid-winter will add to your space heating costs, cause uncomfortable drafts and the window may freeze open. You also can't filter the dust out of the air nor can you recover any of the heat that flows out an open window. Sometimes leaving a window open is a security or noise concern. Finally, you can't control how much air enters through an open window or where it goes once it's in your house.
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