Boiler Replacement Cost in Missoula, Montana
Expect to pay $6,900 to $15,600 for boiler replacement in Missoula, MT. Most homeowners end up near $11,700, depending on the equipment tier and how much of the old setup can be reused.
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Missoula Weather and HVAC Load
In a normal year, Missoula racks up 7,182 heating and 340 cooling degree days (NOAA 1991-2020 normals). Heating is the bigger job here, and furnaces and heat pumps in Missoula put in far more hours than the air conditioner. Count on roughly 163 nights below 32°F and 22 afternoons past 90°F in a typical year. Snowfall averages about 50 inches. For a 2,000 sq ft house, this climate points to a heating load somewhere near 70,000 BTU/h. Treat that as a starting number. A Manual J calculation will move it up or down based on insulation and windows.
| Heating degree days / year | 7,182 |
|---|---|
| Cooling degree days / year | 340 |
| Nights at or below 32°F | 163 |
| Days above 90°F | 22 |
| Average low / high | 34.7°F / 57.6°F |
Missoula Housing Stock
The median Missoula home dates to 1981, according to the Census ACS. That makes the typical house about 45 years old. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. Owners live in 47.8% of occupied homes, roughly 16,000 households. The median home value is $427,400, and median household income is $65,329. We use both figures to adjust labor and pricing for this page.
Between 2020 and 2025, NOAA's Storm Events Database logged 8 hail days and 9 days with damaging thunderstorm winds in Missoula County. The largest hail reported was 2.5 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.
When Replacement Makes Sense
- The pilot or ignition keeps failing
- Leaks, rust, or pressure that keeps dropping
- The boiler is 20 to 30 years old or more
- Some radiators stay cold
What Moves the Price
- Fuel type: gas, oil or propane
- A combi boiler that also makes your hot water
- Pumps, zone valves and the piping around the boiler
- Condensing or non-condensing boiler
- A new chimney liner or venting
For Missoula we raised the national figures about 25%, 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
- Startup and safety tests
- Removing the old boiler
- Flushing and refilling the system
- Venting and fuel hookups
- The new boiler and the piping around it
Montana Permits, Efficiency Rules and Rebates
Montana 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. Equipment replacements in Missoula generally need a mechanical permit, and a reputable contractor will pull it for you. Ask for their Montana license or registration number and a certificate of insurance with the quote. The federal 25C tax credit ended for equipment installed after December 31, 2025, so incentives now come mostly from utilities and state programs. Check your electric and gas utility's rebate page before you pick equipment.
Before You Hire
- Ask your gas or oil company about rebates on condensing boilers.
- For a steam system, hire a contractor who works on steam regularly.
- A combi boiler frees up space and replaces your water heater.
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Boiler Replacement Questions from Missoula Homeowners
How much is boiler replacement in Missoula?
Plan on $6,900 to $15,600, with most jobs near $11,700. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule boiler replacement in Missoula?
Between late spring and early fall. Missoula averages 163 freezing nights a year, and heating calls spike from November through February.
How long does a boiler last?
A cast-iron boiler can last 25 to 35 years. A modern condensing boiler usually lasts 15 to 20 with yearly service.
Can I replace a boiler with a heat pump?
Yes, with an air-to-water heat pump or a ductless system. The radiators may need upgrading, because heat pumps run cooler water than boilers.
Boiler Replacement Near Missoula
- Butte $6,100 to $13,800
- Billings $6,500 to $14,800
- Great Falls $6,100 to $13,900
- Bozeman $7,900 to $17,900
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Missoula; NOAA Storm Events Database 2020-2025, Missoula County. Prices are our estimates, not contractor quotes. Updated 2026.