Air Duct Cleaning Cost in Charleston, South Carolina
Air duct cleaning in Charleston runs about $680 for a typical job (whole house). Basic installs start near $400. High-efficiency equipment with duct or electrical work can reach $910.
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Charleston Weather and HVAC Load
In a normal year, Charleston racks up 1,623 heating and 2,447 cooling degree days (NOAA 1991-2020 normals). Cooling carries most of the load, which is why compressors and condenser fan motors wear out faster here than in northern cities. On average, Charleston gets 6 freezing nights and 24 days above 90°F per year.
| Heating degree days / year | 1,623 |
|---|---|
| Cooling degree days / year | 2,447 |
| Nights at or below 32°F | 6 |
| Days above 90°F | 24 |
| Average low / high | 61.1°F / 73.3°F |
Charleston Housing Stock
Half the homes in Charleston were built before 1994 (Census ACS median), so the typical house is about 32 years old. Plenty of houses from this period still run original 1990s or early-2000s equipment, which is past its expected service life. Charleston has roughly 37,000 owner-occupied homes, or 55.6% of households. Homes here have a median value of $469,100 and households a median income of $90,038. Those two numbers drive the labor adjustment in our estimate.
Charleston County had 11 hail days and 34 days with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. The largest hail reported was 1.25 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. Charleston County also had 8 tornado days in that period.
When to Book It
- You just finished a remodel
- Signs of mice or insects in the ducts
- A musty smell after a leak or flood
- You moved into a house with no maintenance records
What Moves the Price
- How hard it is to reach ducts in the attic or crawlspace
- Sanitizing or mold treatment
- Adding a dryer vent cleaning
- How many supply and return vents the house has
- House size and duct layout
We raised the national figures about 13% for Charleston 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 under negative pressure with a truck or portable vacuum
- Cleaning the blower compartment
- Cleaning the registers and grilles
- Inspecting the supply and return ducts
- Before-and-after photos
South Carolina Permits, Efficiency Rules and Rebates
South Carolina 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 Charleston Homeowners
How much is air duct cleaning in Charleston?
Plan on $400 to $910, with most jobs near $680. 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 Charleston?
Between late fall and early spring. With 24 days over 90°F, Charleston contractors are booked solid all summer, and off-season jobs are easier to schedule and negotiate.
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 Charleston
- Mount Pleasant $470 to $1,070
- North Charleston $330 to $750
- Columbia $320 to $730
- Rock Hill $330 to $760
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Charleston City; NOAA Storm Events Database 2020-2025, Charleston County. Prices are our estimates, not contractor quotes. Updated 2026.