Duct Cleaning in Annapolis, MD
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Seven months of heating pushes whatever is in your ducts through the house
Your furnace runs October through April here, seven months out of the year. Every one of those months, the blower is pushing air through the ductwork, and whatever has settled in there moves with it and into the rooms you're heating.
The county has recorded 248 damaging wind events and 10 winter storms over the past ten years, and storms like that knock out power. Statewide, 11% of households went at least 24 hours without it last year. Each time the system sits off and then starts back up, it stirs loose what has built up in the ducts during the downtime and pushes it out through the vents.
- 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 is no fixed schedule that fits every home. A contractor can look at your ducts and tell you whether there is enough buildup to matter. If anyone in the house has allergies, or you just finished a renovation that left dust behind, that is a reason to have them checked sooner rather than waiting.
- Is air duct cleaning worth it?
- It depends on what is actually in the ducts. If you can see dust blowing out of the vents, or a room never gets enough air, cleaning them will help. If the ducts are just old and untouched with nothing visibly wrong, it is more about comfort and air quality than fixing a problem with the system.
- What does air duct cleaning involve?
- A contractor connects a vacuum system to the ductwork and uses brushes or air tools to knock loose dust and debris, then pulls it out through the vacuum. They will also check the supply and return vents, and often the coil and blower housing near the furnace, since dust collects there too. The filter gets replaced or cleaned as part of the job, since a dirty filter undoes the work fast.