When the vents in a Hermitage home smell musty or show growth, turn the system off and look for the water feeding it: a clogged drain line, a sweating duct or storm water under the house. Cleaning without fixing that source rarely lasts. Call the number on this page to be connected with a local mold remediation company in Hermitage.

Hermitage, in eastern Davidson County about 9 miles from downtown, grew from farmland into a suburban district of starter homes, larger houses and apartments; about 48 percent of households in ZIP 37076 rent, and roughly 27 percent of homes there were built before 1980. The Stones River runs through the Clover Bottom bottomlands, and Stoners Creek crosses the ZIP as well. In the March 2021 flash flooding, Hermitage measured 7.16 inches of rain and a Kroger on Old Hickory Boulevard flooded.
What to do now
- Turn the HVAC off if you suspect mold in it; EPA warns it can spread spores through the house.
- Check whether the condensate line is dripping while the AC runs. No drip on a humid day often means a clog.
- Look at the drain pan for standing water or slime, without scraping anything.
- If you rent, notify the landlord in writing with photos. If a leak isn't fixed, Metro Codes Property Standards takes complaints through hubNashville.
- If water reached the crawl space in a storm, note the date and how long it stood.
- Book an inspection that covers the equipment and the full duct path, not just a vent cover.

What you see and the usual cause
| What you see | Usual cause |
|---|---|
| Musty air only during cooling | Wet coil or a drain pan that holds water |
| Drips from a ceiling register | Condensation on an attic duct or boot with gaps |
| Spots on duct wrap under the floor | Humid crawl space air or storm water under the house |
| Growth on the return grille | Damp air drawn in from a closet, crawl space or attic |
Cost factors
Angi reports national ranges of about $600 to $2,000 for air duct mold cleaning and $3,000 to $10,000 for HVAC system mold work. Middle Tennessee prices vary with duct length, whether insulated duct must be replaced (EPA says it generally can't be cleaned), attic and crawl space access and the moisture repair. In Davidson County, residential jobs of $3,000 or more call for the state Home Improvement license; look up the company on TDCI's Verify a License search. Duct or framing replacement that needs a permit goes through Metro Codes.
HVAC & Air Duct Mold Removal questions in Hermitage
I rent my home. Who fixes moldy vents or a leaking air handler?
How do I keep the condensate drain from causing mold?
Can ductwork in the attic grow mold?
Should I call an HVAC company or a mold remediation company first?
More mold services in Hermitage
HVAC & Air Duct Mold Removal nearby
Helpful guides
Sources
- Hermitage, Tennessee (Wikipedia)
- City-Data: ZIP 37076 (Hermitage)
- National Weather Service Nashville: March 27-28, 2021 flash flooding
- Metro Codes: Codes Violation Types
- Metro Codes: Residential Building Permits
- EPA: Mold Cleanup in Your Home
- EPA: Should You Have the Air Ducts in Your Home Cleaned?
- Angi: How Much Does Mold Remediation Cost? (2026 data)
- TDCI: Bidding and Contractor License Requirements (pdf)
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