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Clear Snow Away from Vents
During the winter months, regularly check your outdoor vents—such as your furnace and dryer vents—to make sure they are clear of snow and ice. Blocked vents can cause carbon monoxide to build up.
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Fix Air Leaks from Windows and Doors
Neglecting to remedy any air leaks from windows and doors can lead to condensation, which can lead to mold. And make sure all windows and doors have proper weather stripping before the cold and snow arrives. In addition to preventing condensation and mold, it will help keep your energy bills down.
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Clean the Chimney
If you use your fireplace, be sure to have it and the chimney cleaned before that first fire of the season. And this will ensure there's no buildup of harmful creosote or any debris such as leaves or bird nests, which can become a fire hazard.