Air Duct Cleaning Cost in Duluth, Minnesota
Expect to pay $330 to $750 for air duct cleaning in Duluth, MN (whole house). Most homeowners end up near $560, depending on the equipment tier and how much of the old setup can be reused.
Duluth Weather and HVAC Load
Duluth logs 9,048 heating degree days and 259 cooling degree days in a normal year, based on the closest NOAA weather station. Heating is the bigger job here, and furnaces and heat pumps in Duluth put in far more hours than the air conditioner. Count on roughly 166 nights below 32°F and 2 afternoons past 90°F in a typical year. Snowfall averages about 56 inches.
| Heating degree days / year | 9,048 |
|---|---|
| Cooling degree days / year | 259 |
| Nights at or below 32°F | 166 |
| Days above 90°F | 2 |
| Average low / high | 33.1°F / 48.5°F |
Duluth Housing Stock
Census figures put the median build year in Duluth at 1951, so a typical house here has about 75 years on it. Houses that old often still have duct runs sized for an old coal or oil furnace and 60- or 100-amp electrical panels. Both can add cost when new equipment goes in. Owners live in 60.2% of occupied homes, roughly 22,000 households. With a median household income of $66,263 and a median home value of $225,700, local labor rates come out near the national middle in our model.
NOAA storm reports for St. Louis County show 42 hail days and 41 days with damaging thunderstorm winds over the six years from 2020 to 2025. The largest hail reported was 3 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. St. Louis County also had 3 tornado days in that period.
When to Book It
- You just finished a remodel
- You moved into a house with no maintenance records
- A musty smell after a leak or flood
- Dust puffs out of the vents when the system starts
What Moves the Price
- How many supply and return vents the house has
- How hard it is to reach ducts in the attic or crawlspace
- Sanitizing or mold treatment
- House size and duct layout
- Adding a dryer vent cleaning
We lowered the national figures about 7% for Duluth 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 registers and grilles
- Before-and-after photos
- Cleaning under negative pressure with a truck or portable vacuum
- Cleaning the blower compartment
- Inspecting the supply and return ducts
Minnesota Permits, Efficiency Rules and Rebates
Minnesota 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
- Put in a new filter as soon as the cleaning is done.
- Ask whether the company follows NADCA standards.
- If the ducts leak, have them sealed during the same visit.
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Air Duct Cleaning Questions from Duluth Homeowners
How much is air duct cleaning in Duluth?
Plan on $330 to $750, with most jobs near $560. 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 Duluth?
Between late spring and early fall. Duluth averages 166 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 Duluth
- Bloomington $380 to $860
- Rochester $360 to $830
- St. Paul $340 to $790
- Minneapolis $360 to $830
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Duluth Harbor Station; NOAA Storm Events Database 2020-2025, St. Louis County. Prices are our estimates, not contractor quotes. Updated 2026.