Some homeowners tend to be more sensitive to these contaminants than others. Allergy and asthma sufferers, and youthful youngsters as well as elderly, tend to be much more at risk of the kinds of inadequate indoor air excellent that air duct cleaning may also help handle. Image: Tom Fenenga for https://www.google.com/maps/d/edit?mid=1y_n9dkAi2LzlxtpvFksxll-ZnG7ldPw&usp=sharing