Duct Cleaning in Westminster, MD
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Seven months of heating pushes air through your ducts
Your furnace runs October through April here, seven months of the year. On nights that average 25°F it cycles on and off many times to keep the house warm, and every cycle pushes air through the same ductwork. Dust and fine debris settle along the way, and a system running that many months builds up more of it than a filter alone catches.
Carroll County has seen 21 winter storms and 173 damaging wind events over the past ten years. When storms cut power, the furnace blower stops and starts back up once it returns, and that stop-start cycle can stir up whatever has settled in the ducts. Over time that buildup can mean uneven heat from room to room and dustier air coming through the vents.
- 7 months
- October through April, 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 is no fixed schedule that fits every house. Have them cleaned sooner if anyone in the house has allergies, if pets are shedding into the return vents, or if a renovation left drywall dust in the system. Homes here run the furnace from October through April, so whatever is sitting in the ducts gets pushed through the house for seven months straight.
- Is air duct cleaning worth it?
- It depends on what is actually in your ducts. If you see dust kicking out of the vents when the furnace starts, or you are dusting furniture more often than you used to, cleaning them will make a real difference. If the ducts are new or were cleaned recently, there is not much to gain. A contractor can look inside with a camera and tell you honestly whether it is worth doing before any work starts.
- What does air duct cleaning involve?
- A contractor connects a vacuum to the duct system to pull air through it at negative pressure, then agitates the inside of the ducts with brushes or air whips to knock loose dust and debris so it gets pulled into the vacuum instead of back into the house. Every supply and return vent gets cleaned this way, along with the main trunk lines. Most contractors also clean the blower compartment and check the coil while they are in there, since dust in the ducts usually means dust on the coil too.