Flexible silver HVAC ducts and a sheet-metal plenum box inside a dimly lit attic with fiberglass insulation and a louvered vent casting light through dust.

Duct Cleaning in Warrensburg, MO

Tell us about your home, and a licensed contractor who covers Johnson County will get in touch.

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Step 1 of 3: Equipment
Insulated HVAC ducts and a metal flue pipe installed inside a wood-framed residential attic with sunlight streaming through a vent.

Seven months of heat means seven months of dust moving through your ducts

Your furnace runs October through April here, close to 24°F on a typical winter night. That means seven months where air is pulled through the return, across the filter, and back out through every vent in the house. Whatever the filter misses ends up settling in the ducts themselves, and it stays there long after the season ends.

Johnson County has seen 61 damaging wind events and 10 winter storms over the last ten years. Storms like that mean power interruptions, and furnaces and air handlers that sit idle for a stretch tend to kick dust loose when they start back up. In a house that has settled dust sitting in the ductwork, that first blast after an outage pushes it straight into the rooms you live in.

7 months
October through April, your furnace pushes air through your ducts
5 months
May through September, your air conditioner does the same
Isometric cutaway illustration of a house interior showing rooms with furniture and a network of ducts connected to ceiling vents and an air handling unit.
Your ducts carry heat October through April and cooled air May through September.

NOAA nClimDiv, 1991–2020 normals

How often should air ducts be cleaned?
There is no fixed schedule that fits every house. A contractor can look at your ducts and tell you whether dust has built up enough to matter. Homes here run the furnace 7 months of the year, October through April, and that much air moving through the ducts carries dust and pet hair into them faster than a house that only heats for a few months.
Is air duct cleaning worth it?
It is worth it if you can see dust blowing out of the vents or someone in the house has allergy symptoms that ease up when they are away from home. Clean ducts mean your furnace and air conditioner move air freely instead of pushing it through a coating of dust. It will not fix a duct that is leaking air into the attic or crawlspace, that is a separate repair a contractor would handle on its own.
What does air duct cleaning involve?
A contractor hooks a vacuum to your duct system and uses brushes or air tools to knock the dust off the inside walls of the ducts, then draws it out through the vacuum. The supply and return vents get cleaned too, along with the coil and blower housing at the furnace or air handler, since dust settles there as well. A full job covers every duct in the house, not just the ones you can see into.