By Paul F. P. Pogue
From Ask Angi
Air duct cleaning ranks high on the list of household maintenance that can easily be forgotten as it’s out of sight, out of mind. You‘ll rarely see the impact of debris in your ducts, and since the job only needs to be done every two to five years, it can easily fall by the wayside. But if you leave an uncleaned duct system long enough, you’ll eventually start noticing lower efficiency and odors if debris or pests have gotten into it.
