Duct Cleaning in Harrisburg, PA
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Eight months of heating pulls dust through your ducts
Your furnace runs October through May here, eight months of the year. Every cycle pulls air through the return duct and pushes it back out through the supply side, and whatever is sitting in the ductwork rides along with it. Over eight months that adds up to a lot of passes.
Dauphin County has also seen 18 winter storms and 149 damaging wind events over the past ten years, and power drops with them. In Pennsylvania, 15% of households went at least 24 hours without power in 2024. Each time the furnace shuts off and restarts, it kicks loose whatever has settled in the ducts since the last cycle.
- 8 months
- October through May, your furnace pushes air through your ducts
- 3 months
- June through August, 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 let a contractor tell you what your ducts need. If anyone in the house has allergies, or you've had a renovation that kicked up dust and drywall debris, sooner makes sense. Homes with pets shedding into the return vents also tend to need it more often. If you can see dust building up around the vent covers or coming out when the system starts, that's a sign to have it looked at regardless of when it was last done.
- Is air duct cleaning worth it?
- It depends on what's going on in your ducts. If you're seeing dust resettle on surfaces soon after cleaning, or there's a musty smell when the air kicks on, cleaning is worth doing. It won't fix a duct that's leaking air or poorly sealed, and it won't lower your heating bill on its own. A contractor can look inside the ducts with a camera and tell you whether there's enough buildup to matter before you commit to it.
- What does air duct cleaning involve?
- A contractor connects a vacuum system to the ductwork that pulls air through the whole system while agitating the inside of the ducts to knock dust and debris loose. They'll go register by register, sometimes using brushes or air whips to dislodge material stuck to the duct walls, and check the return and supply sides. The furnace or air handler itself often gets cleaned at the same time, since the blower and coil sit right in that same airflow path.