Duct Cleaning in Knoxville, TN
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Step 1 of 3: Equipment
Seven months of heat pushes a lot of air through those ducts
Your furnace runs October through April here, close to seven months a year. Every one of those months it pulls air through the same ductwork, night after night. That air carries dust and pet hair, and it settles on the inside walls of the trunk lines and branches.
The buildup does not stop the air from moving, but it gives the furnace more to push through, and it is what gets stirred loose and blown into the rooms each time the system kicks on.
- 7 months
- October through April, your furnace pushes air through your ducts
- 5 months
- May through September, your air conditioner does the same
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NOAA nClimDiv, 1991–2020 normals
- How often should air ducts be cleaned?
- There is no fixed schedule that fits every house. If anyone in the house has allergies, or you have pets that shed, or you just finished a renovation, the ducts fill with dust and debris faster and are worth checking sooner. Homes here run the furnace October through April, so a duct that needs attention usually shows it once the heat kicks on, with more dust blowing out of the vents or a musty smell when the air starts moving. A contractor can look at the ductwork and tell you where things stand.
- Is air duct cleaning worth it?
- It depends on what is going on in your ducts. If you can see dust building up around the vents, if someone in the house has unexplained allergy symptoms, or if you just had work done that left construction debris behind, cleaning solves a real problem. If none of that applies, it will not make your air noticeably cleaner or cut your energy bills, since ducts carry air and the filter is what actually cleans it. A contractor can look at your system and tell you whether it needs it.
- What does air duct cleaning involve?
- A contractor loosens the dust and debris built up inside the ductwork, then vacuums it out with a high-powered system so it does not just blow back into the room. This usually covers the supply and return ducts, the grilles and registers, and sometimes the coil and blower compartment near the furnace. Each section gets sealed off while it is cleaned so nothing escapes into the house during the work.