Duct Cleaning in New Haven, CT
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Your ducts run eight months a year in New Haven County
Heat runs October through May here. That's eight months of the year with air moving through the ducts, and idle months between where dust just settles into the runs instead. When the furnace starts back up on a cold night, that dust blows out through the vents into the rooms you're sitting in.
Winter nights here average 25°F from December through February, so the furnace is working hard through most of the heating season. A fifth of Connecticut households lost power for a full day or more in 2024. Every hour the system sits off, dust has more time to settle in the ducts before the furnace kicks back on and pushes it through the house again.
- 8 months
- October through May, your furnace pushes air through your ducts
- 3 months
- June through August, your air conditioner does the same

NOAA 1991–2020 monthly normals
- How often should air ducts be cleaned?
- There is no fixed schedule that fits every house, so most guidance points to having them checked every few years rather than on a strict clock. If anyone in the house has allergies, there are pets that shed, or you just finished a renovation, it is worth looking sooner since dust builds up faster in those cases. Homes here run their heat from October through May, so the ducts are moving air most of the year, which is reason enough to have them checked from time to time.
- Is air duct cleaning worth it?
- It depends on what is going on in your ducts right now. If you can see dust kicking out of the vents, there is a musty smell when the system runs, or someone in the house has unexplained allergy symptoms, cleaning is worth it. If none of that is happening, the ducts are probably fine and cleaning will not change how the system heats or cools.
- What does air duct cleaning involve?
- A contractor connects a powerful vacuum to the duct system, then uses brushes or air whips to knock loose dust and debris from inside so it can be pulled out. Every supply and return vent gets cleaned this way, and the furnace or air handler itself gets a look too since dust collects there as well. A full house means going run by run, since each vent connects to its own section of duct.

