Air Duct Cleaning Cost in Knoxville, Tennessee
Expect to pay $310 to $700 for air duct cleaning in Knoxville, TN (whole house). Most homeowners end up near $520, depending on the equipment tier and how much of the old setup can be reused.
Compare Free Quotes in Knoxville
Knoxville Weather and HVAC Load
NOAA's 1991-2020 climate normals put Knoxville at 3,911 heating degree days and 1,363 cooling degree days per year. Heating is the bigger job here, and furnaces and heat pumps in Knoxville put in far more hours than the air conditioner. Count on roughly 87 nights below 32°F and 36 afternoons past 90°F in a typical year. Snowfall averages about 5 inches.
| Heating degree days / year | 3,911 |
|---|---|
| Cooling degree days / year | 1,363 |
| Nights at or below 32°F | 87 |
| Days above 90°F | 36 |
| Average low / high | 45.9°F / 70°F |
Knoxville Housing Stock
Census figures put the median build year in Knoxville at 1974, so a typical house here has about 52 years on it. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. Knoxville has roughly 40,000 owner-occupied homes, or 46.6% of households. The median home value is $214,000, and median household income is $50,994. We use both figures to adjust labor and pricing for this page.
Knox County had 12 hail days and 54 days with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. The largest hail reported was 1.75 inches across. Hail flattens the thin aluminum fins on condenser coils and cuts airflow. After a big storm, take a look at the outdoor unit; homeowners insurance often covers the damage.
When to Book It
- You moved into a house with no maintenance records
- Signs of mice or insects in the ducts
- You just finished a remodel
- A musty smell after a leak or flood
What Moves the Price
- House size and duct layout
- Adding a dryer vent cleaning
- How hard it is to reach ducts in the attic or crawlspace
- Sanitizing or mold treatment
- How many supply and return vents the house has
We lowered the national figures about 12% for Knoxville using local income, home values and the equipment size this climate needs. Real bids can still come in outside the range, so collect three written quotes.
What the Quote Should Cover
- Cleaning the blower compartment
- Inspecting the supply and return ducts
- Cleaning under negative pressure with a truck or portable vacuum
- Before-and-after photos
- Cleaning the registers and grilles
Tennessee Permits, Efficiency Rules and Rebates
Tennessee is in the DOE's Southeast region, where new split central air conditioners need at least 14.3 SEER2 (13.8 SEER2 for systems of 45,000 BTU/h and up).
Before You Hire
- If the ducts leak, have them sealed during the same visit.
- Ask whether the company follows NADCA standards.
- Put in a new filter as soon as the cleaning is done.
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Air Duct Cleaning Questions from Knoxville Homeowners
How much is air duct cleaning in Knoxville?
Plan on $310 to $700, with most jobs near $520. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule air duct cleaning in Knoxville?
Between late spring and early fall. Knoxville averages 87 freezing nights a year, and heating calls spike from November through February.
How often should ducts be cleaned?
There's no set schedule. The EPA recommends cleaning when there's visible mold, pests or a lot of debris, not on a routine basis.
Does duct cleaning lower energy bills?
Not by much. Sealing leaky ducts makes a much bigger difference to efficiency and comfort.
Air Duct Cleaning Near Knoxville
- Memphis $300 to $680
- Chattanooga $330 to $750
- Nashville $360 to $830
- Clarksville $330 to $750
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Knoxville Experiment Station; NOAA Storm Events Database 2020-2025, Knox County. Prices are our estimates, not contractor quotes. Updated 2026.