Furnace Replacement Cost in Boise City, Idaho
Our 2026 estimate for furnace replacement in Boise City, ID is $3,900 to $9,600. That puts Boise City 23% above the national average, mainly because of higher incomes and home values, which push labor rates up and the bigger heating equipment this climate calls for.
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Boise City Weather and HVAC Load
Boise City logs 5,320 heating degree days and 1,045 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 Boise City put in far more hours than the air conditioner. On average, Boise City gets 108 freezing nights and 55 days above 90°F per year. Snowfall averages about 18 inches. For a 2,000 sq ft house, this climate points to a heating load somewhere near 60,000 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 | 5,320 |
|---|---|
| Cooling degree days / year | 1,045 |
| Nights at or below 32°F | 108 |
| Days above 90°F | 55 |
| Average low / high | 42°F / 64.3°F |
Boise City Housing Stock
Half the homes in Boise City were built before 1985 (Census ACS median), so the typical house is about 41 years old. Plenty of houses from this period still run original 1990s or early-2000s equipment, which is past its expected service life. Boise City has roughly 63,000 owner-occupied homes, or 63% of households. With a median household income of $81,308 and a median home value of $456,000, local labor rates come out above the national middle in our model.
Ada County had 2 hail days and 13 days with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. The largest hail reported was 1.25 inches across. Storms here are more likely to cause power surges than coil damage, so a surge protector on the outdoor unit is worth the small cost.
When Replacement Makes Sense
- A repair quote runs past a third of the cost of a new unit
- Gas or electric bills keep climbing even though usage hasn't changed
- The furnace is 15 to 20 years old or more
- Some rooms stay cold, the burner short-cycles, or the ignitor keeps failing
What Moves the Price
- Condition of the existing ductwork and any changes it needs
- BTU size, which should come from a Manual J load calculation
- New PVC venting if you move to a condensing model
- Single-stage, two-stage or modulating gas valve
- AFUE rating: a basic 80% unit vs. a 96% condensing furnace
- Permit and inspection fees, which the local building department sets
For Boise City we raised the national figures about 23%, 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
- Gas line and vent connections
- The new furnace, filter rack and thermostat wiring
- The permit and the manufacturer warranty registration
- Removing and hauling away the old furnace
- Combustion and safety tests
Idaho Permits, Efficiency Rules and Rebates
Idaho 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. Expect the contractor to pull a mechanical permit for a replacement job in Boise City. If a bidder suggests skipping it, move on. Also ask for a Idaho license or registration number and proof of insurance. 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
- Make sure all three quotes are for the same AFUE and staging, or you can't compare them.
- Look up utility rebates on 95%+ AFUE units before you buy.
- Replace it in early fall if you can. A no-heat emergency in January costs more and leaves you fewer choices.
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Furnace Replacement Questions from Boise City Homeowners
How much is furnace replacement in Boise City?
Plan on $3,900 to $9,600, with most jobs near $7,000. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule furnace replacement in Boise City?
Between late spring and early fall. Boise City averages 108 freezing nights a year, and heating calls spike from November through February.
How long does a furnace replacement take?
A straight swap is usually done in one day, somewhere between 4 and 10 hours. Moving to a condensing furnace with new PVC venting can add a few more.
Is a high-efficiency furnace worth it?
In cold climates, a 95%+ AFUE furnace usually earns back the price difference in lower gas bills. Where winters are mild, the payback can take a very long time.
Furnace Replacement Near Boise City
- Meridian $4,200 to $10,200
- Nampa $3,600 to $8,900
- Caldwell $3,500 to $8,600
- Idaho Falls $3,800 to $9,200
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Boise Air Terminal; NOAA Storm Events Database 2020-2025, Ada County. Prices are our estimates, not contractor quotes. Updated 2026.