Boiler Replacement Cost in Idaho

Boiler replacement in Idaho costs $6,600 to $15,000 in 2026, though city-to-city prices vary quite a bit. Heating drives most HVAC spending in Idaho: its larger communities average 5,907 heating and 767 cooling degree days a year.

Boiler Replacement Prices in Idaho Cities

City	Estimate	Heating / cooling degree days
Boise City	$6,700 to $15,300	5,320 / 1,045
Meridian	$7,200 to $16,300	5,320 / 1,045
Nampa	$6,200 to $14,200	5,549 / 825
Caldwell	$6,100 to $13,900	5,549 / 825
Idaho Falls	$6,500 to $14,800	7,144 / 443

From 2020 through 2025, NOAA recorded 954 winter storm and ice events, 38 heat events, 55 extreme cold events and 122 hail reports in Idaho. 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 Idaho

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