Boiler Replacement Cost in Montana

Boiler replacement in Montana costs $6,800 to $15,400 in 2026, though city-to-city prices vary quite a bit. Heating drives most HVAC spending in Montana: its larger communities average 7,462 heating and 384 cooling degree days a year.

Boiler Replacement Prices in Montana Cities

City	Estimate	Heating / cooling degree days
Billings	$6,500 to $14,800	6,753 / 662
Missoula	$6,900 to $15,600	7,182 / 340
Great Falls	$6,100 to $13,900	6,942 / 421
Bozeman	$7,900 to $17,900	7,827 / 229
Butte	$6,100 to $13,800	9,128 / 82

From 2020 through 2025, NOAA recorded 1,442 winter storm and ice events, 13 heat events, 471 extreme cold events and 905 hail reports in Montana. Those are the days when emergency HVAC calls pile up.

When Replacement Makes Sense

The boiler is 20 to 30 years old or more
Leaks, rust, or pressure that keeps dropping
Some radiators stay cold
Fuel bills keep going up
The pilot or ignition keeps failing

What Moves the Price

Condensing or non-condensing boiler
A combi boiler that also makes your hot water
Fuel type: gas, oil or propane
A new chimney liner or venting
Pumps, zone valves and the piping around the boiler

Common Questions

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.

Other HVAC Prices in Montana

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