Furnace Replacement Cost in Spokane, Washington
Our 2026 estimate for furnace replacement in Spokane, WA is $3,600 to $8,800. That puts Spokane 13% above the national average, mainly because of the bigger heating equipment this climate calls for.
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Spokane Weather and HVAC Load
In a normal year, Spokane racks up 6,018 heating and 506 cooling degree days (NOAA 1991-2020 normals). Heating is the bigger job here, and furnaces and heat pumps in Spokane put in far more hours than the air conditioner. A normal year brings 123 nights at or below freezing and 29 days over 90°F. Snowfall averages about 45 inches. For a 2,000 sq ft house, this climate points to a heating load somewhere near 65,000 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 | 6,018 |
|---|---|
| Cooling degree days / year | 506 |
| Nights at or below 32°F | 123 |
| Days above 90°F | 29 |
| Average low / high | 38.9°F / 60.7°F |
Spokane Housing Stock
The median Spokane home dates to 1961, according to the Census ACS. That makes the typical house about 65 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. Spokane has roughly 56,000 owner-occupied homes, or 58.3% of households. The median home value is $326,200, and median household income is $65,745. We use both figures to adjust labor and pricing for this page.
Between 2020 and 2025, NOAA's Storm Events Database logged 5 hail days and 12 days with damaging thunderstorm winds in Spokane County. The largest hail reported was 2.75 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. Spokane County also had 2 tornado days in that period.
When Replacement Makes Sense
- Gas or electric bills keep climbing even though usage hasn't changed
- The furnace is 15 to 20 years old or more
- A repair quote runs past a third of the cost of a new unit
- A tech found a cracked heat exchanger, or the CO detector has gone off
What Moves the Price
- BTU size, which should come from a Manual J load calculation
- AFUE rating: a basic 80% unit vs. a 96% condensing furnace
- Permit and inspection fees, which the local building department sets
- New PVC venting if you move to a condensing model
- Single-stage, two-stage or modulating gas valve
- Condition of the existing ductwork and any changes it needs
We raised the national figures about 13% for Spokane using local income, home values and the equipment size this climate needs. Real bids can still come in outside the range, so collect three written quotes.
What the Quote Should Cover
- The new furnace, filter rack and thermostat wiring
- Combustion and safety tests
- Removing and hauling away the old furnace
- The permit and the manufacturer warranty registration
- Gas line and vent connections
Washington Permits, Efficiency Rules and Rebates
Washington 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 Spokane. If a bidder suggests skipping it, move on. Also ask for a Washington 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
- Ask for the Manual J load calculation in writing. Oversized furnaces are the most common mistake we see.
- 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 Spokane Homeowners
How much is furnace replacement in Spokane?
Plan on $3,600 to $8,800, with most jobs near $6,500. 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 Spokane?
Between late spring and early fall. Spokane averages 123 freezing nights a year, and heating calls spike from November through February.
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.
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.
Furnace Replacement Near Spokane
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Spokane Felts Field; NOAA Storm Events Database 2020-2025, Spokane County. Prices are our estimates, not contractor quotes. Updated 2026.