- By empiredd
There are a number of things that might indicate your ducts are getting dirty. If you smell stale or musty odors when the furnace or air conditioning runs, that’s one indicator; another is that your furnace filters quickly become dirty after changing them. If you notice excessive dust that reappears on your furniture or walls shortly after cleaning, that’s another indicator of trouble. Other problems that might indicate you need to clean the ducts include low airflow from your vents and unexplained headaches or congestion. Even if you don’t have any of these warning indicators, you should have your ducts cleaned regularly if anyone in your home has allergies or asthma; if you, your family members, or prior residents of the house are or were smokers; and if you or the prior residents kept cats, dogs, or other pets.