Air Duct Cleaning Cost in St. George, Utah
Air duct cleaning in St. George runs about $640 for a typical job (whole house). Basic installs start near $370. High-efficiency equipment with duct or electrical work can reach $860.
Compare Free Quotes in St. George
St. George Weather and HVAC Load
NOAA's 1991-2020 climate normals put St. George at 3,205 heating degree days and 2,416 cooling degree days per year. Neither season dominates in St. George. That balance is a big reason heat pumps and dual-fuel systems sell well in Utah. Count on roughly 62 nights below 32°F and 128 afternoons past 90°F in a typical year. Snowfall averages about 1 inches.
| Heating degree days / year | 3,205 |
|---|---|
| Cooling degree days / year | 2,416 |
| Nights at or below 32°F | 62 |
| Days above 90°F | 128 |
| Average low / high | 48.2°F / 77.3°F |
St. George Housing Stock
Census figures put the median build year in St. George at 2000, so a typical house here has about 26 years on it. Plenty of houses from this period still run original 1990s or early-2000s equipment, which is past its expected service life. About 24,000 households here own their home, 68.2% of the occupied total. With a median household income of $72,870 and a median home value of $456,900, local labor rates come out near the national middle in our model.
NOAA storm reports for Washington County show 4 hail days and 15 days with damaging thunderstorm winds over the six years from 2020 to 2025. The largest hail reported was 1 inches across. Storms here are more likely to cause power surges than coil damage, so a surge protector on the outdoor unit is worth the small cost. In St. George, 22% of residents are 65 or older. For older adults, a house with no heat in January or no AC during a heat wave is a medical risk. Mention it when you call, since many companies put those calls first.
When to Book It
- You just finished a remodel
- A musty smell after a leak or flood
- You moved into a house with no maintenance records
- Dust puffs out of the vents when the system starts
What Moves the Price
- Adding a dryer vent cleaning
- Sanitizing or mold treatment
- How hard it is to reach ducts in the attic or crawlspace
- How many supply and return vents the house has
- House size and duct layout
For St. George we raised the national figures about 7%, based on local income, home values and climate-based equipment sizing. Get at least three written quotes; real bids can land outside this range.
What the Quote Should Cover
- Cleaning the blower compartment
- Cleaning under negative pressure with a truck or portable vacuum
- Inspecting the supply and return ducts
- Before-and-after photos
- Cleaning the registers and grilles
Utah Permits, Efficiency Rules and Rebates
Utah falls in the DOE's North region. New split central air conditioners must meet at least 13.4 SEER2, and heat pumps sold anywhere in the U.S. need 14.3 SEER2 and 7.5 HSPF2.
Before You Hire
- Ask whether the company follows NADCA standards.
- Watch out for $99 whole-house deals. They tend to turn into upsells once the crew is inside.
- Put in a new filter as soon as the cleaning is done.
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Air Duct Cleaning Questions from St. George Homeowners
How much is air duct cleaning in St. George?
Plan on $370 to $860, with most jobs near $640. 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 St. George?
In spring or fall. Those are the slow months between heating and cooling season in St. George.
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 St. George
- Provo $360 to $820
- West Jordan $410 to $940
- West Valley City $380 to $870
- Salt Lake City $380 to $880
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station St. George; NOAA Storm Events Database 2020-2025, Washington County. Prices are our estimates, not contractor quotes. Updated 2026.