Duct Cleaning in Leonardtown, MD
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Seven months of heating pushes dust and debris through your ducts
Your furnace runs October through April here, close to seven months a year. On winter nights that average 29°F, it cycles on and off many times to keep the house warm. Every cycle pushes air, and whatever is sitting in the ducts, through the system and into the rooms you live in.
Power doesn't always stay on through what the weather brings. St. Mary's County has seen 14 winter storms and 146 damaging wind events over the past ten years, and across Maryland, 11% of households lost power for 24 hours or more in 2024. Each time a system shuts down and restarts, it stirs up what has settled in the ductwork since the last run.
- 7 months
- October through April, your furnace pushes air through your ducts
- 4 months
- June through September, your air conditioner does the same
NOAA nClimDiv, 1991–2020 normals
- How often should air ducts be cleaned?
- There's no fixed schedule that fits every home, so a contractor should look at the actual ductwork to tell you if it needs cleaning. If anyone in the house has allergies, or there's been a renovation that kicked up dust and drywall debris, that's a reason to check sooner. Homes with pets or a recent pest problem in the ducts should also get a look. Outside of those cases, ducts that aren't showing signs of buildup don't need cleaning on a schedule at all.
- Is air duct cleaning worth it?
- It's worth it if you can see dust coming out of the vents, notice a musty smell when the system runs, or know there's debris in the ducts from work done on the house. Cleaning ducts on a system that's already running fine and has no signs of buildup won't improve your air quality or lower your heating and cooling bills. The dust that settles in ducts mostly stays put unless it's disturbed, so the ducts themselves aren't usually the source of what you're breathing. A contractor can look at the actual ductwork and tell you whether there's enough buildup to matter.
- What does air duct cleaning involve?
- A technician connects a vacuum system to the ductwork and uses brushes or air tools to knock dust and debris loose so it can be pulled out, working through each supply and return run. They'll also clean the grilles and registers, and check the coil and blower compartment since debris collects there too. The furnace filter still does the job of catching what's in the air day to day. Duct cleaning deals with what's already built up inside the metal, not what's coming through going forward.