Does cleaning air ducts really make a difference?

Professional residential air duct cleaning can make a noticeable difference in specific situations, such as after completing major home renovations, moving into a previously owned home with heavy pet or smoker odors, or when visible mold growth and rodent infestations are present within the trunk lines. However, for standard homes with routine dust accumulation, cleaning ducts does not always drastically lower energy bills or eliminate general household dust, because dust inside ducts tends to adhere to surfaces rather than blowing continuously into the air unless disturbed. The Environmental Protection Agency recommends cleaning only when necessary. You can troubleshoot by inspecting supply registers with a flashlight. You can verify that cleaning made a difference when visible particulate buildup is completely removed and musty odors disappear from your living spaces.