Air Duct Cleaning Cost in Bismarck, North Dakota
Our 2026 estimate for air duct cleaning in Bismarck, ND is $350 to $800 (whole house). That puts Bismarck right around the national average.
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Bismarck Weather and HVAC Load
In a normal year, Bismarck racks up 8,641 heating and 406 cooling degree days (NOAA 1991-2020 normals). Heating is the bigger job here, and furnaces and heat pumps in Bismarck put in far more hours than the air conditioner. On average, Bismarck gets 181 freezing nights and 9 days above 90°F per year. Snowfall averages about 51 inches.
| Heating degree days / year | 8,641 |
|---|---|
| Cooling degree days / year | 406 |
| Nights at or below 32°F | 181 |
| Days above 90°F | 9 |
| Average low / high | 31.3°F / 53.3°F |
Bismarck Housing Stock
Census figures put the median build year in Bismarck at 1984, so a typical house here has about 42 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. Bismarck has roughly 21,000 owner-occupied homes, or 65.8% of households. The median home value is $291,400, and median household income is $77,608. We use both figures to adjust labor and pricing for this page.
Burleigh County had 17 hail days and 23 days with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. The largest hail reported was 4.5 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. Burleigh County also had 3 tornado days in that period. In Bismarck, 18.7% 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
- You moved into a house with no maintenance records
- Signs of mice or insects in the ducts
- Dust puffs out of the vents when the system starts
What Moves the Price
- Sanitizing or mold treatment
- House size and duct layout
- How hard it is to reach ducts in the attic or crawlspace
- Adding a dryer vent cleaning
- How many supply and return vents the house has
For Bismarck we kept the national figures close to unchanged, 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
- Inspecting the supply and return ducts
- Cleaning the blower compartment
- Before-and-after photos
- Cleaning under negative pressure with a truck or portable vacuum
- Cleaning the registers and grilles
North Dakota Permits, Efficiency Rules and Rebates
North Dakota 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.
- Watch out for $99 whole-house deals. They tend to turn into upsells once the crew is inside.
- Ask whether the company follows NADCA standards.
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Air Duct Cleaning Questions from Bismarck Homeowners
How much is air duct cleaning in Bismarck?
Plan on $350 to $800, with most jobs near $600. 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 Bismarck?
Between late spring and early fall. Bismarck averages 181 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 Bismarck
- Minot $340 to $790
- Fargo $330 to $760
- Grand Forks $330 to $750
- West Fargo $380 to $860
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Bismarck 2.4; NOAA Storm Events Database 2020-2025, Burleigh County. Prices are our estimates, not contractor quotes. Updated 2026.