Air ducts require occasional cleaning to keep your home healthy It’s not terribly pleasant to think about where dust comes from — an accumulation of dirt, dead skin cells, dandruff, pet dander, mites, smoke particles and other pollutants. This detritus circulates through the air in your home, where you and your family unavoidably breathe it in on a daily basis. And because dust is heavier than air, it settles into vents and ducts just like it does onto flat surfaces. Think about how often you dust your furniture, and how much dust would build up if you neglected this chore
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