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How much does gas furnace replacement cost in Idaho?
Updated September 2026 · Idaho price index 0.94 for HVAC work (national = 1.00)
In Idaho, an HVAC company typically charges $3,600 to $9,400 to replace a standard-efficiency gas furnace, with most jobs landing near $5,700. That is about 6% below the national average of $3,800–$10,000, based on what HVAC technicians earn in Idaho.
AI-powered second opinion using these same Idaho figures. No account, no card. Need someone to do the work? Verified pros in Idaho took the Fair Price Pledge.
What a Idaho quote means
| Quote for this job | What it means |
|---|---|
| Under $2,160 | Suspiciously low — ask what is excluded, and check licensing and insurance |
| $2,160 – $10,340 | Fair price — inside the typical range (up to 10% over the top is still normal) |
| $10,340 – $16,450 | Running high — get the quote itemized, and get a second one |
| Over $16,450 | Ripoff territory — more than 1.75× the high end of the typical range |
Same rules the QuoteJury checker uses on every quote.
What you're paying for
What is usually included: The new furnace, flue or vent connections, gas and electrical hookups, thermostat, permit, removal of the old unit, and most of a day's labor.
What moves the price:
- Efficiency: 80% AFUE units are cheaper than 95%+ condensing furnaces, which also need PVC venting and a condensate drain
- Furnace size (BTU) and variable-speed blowers
- Venting changes, especially when a water heater shares the old chimney
- Ductwork and return-air modifications
- Permit and inspection
AFUE tier (80% vs 90%+ condensing adds venting/condensate work), BTU size, single-stage vs two-stage/modulating, flue and gas-line changes, and permit/disposal.
Gas furnace replacement cost across Idaho
Typical range by metro and rural area, from BLS wage data for HVAC technicians in each area.
| Area | Typical range | Most jobs |
|---|---|---|
| Boise City, ID | $3,650 – $9,600 | $5,700 |
| Coeur d'Alene, ID | $3,650 – $9,600 | $5,800 |
| Idaho Falls, ID | $3,300 – $8,700 | $5,200 |
| Lewiston, ID-WA | $3,350 – $8,900 | $5,300 |
| Pocatello, ID | $3,350 – $8,800 | $5,300 |
| Twin Falls, ID | $3,350 – $8,800 | $5,300 |
| Northwestern Idaho nonmetropolitan area | $3,300 – $8,700 | $5,200 |
| Southeast-Central Idaho nonmetropolitan area | $3,450 – $9,000 | $5,400 |
Frequently asked
Is $5,700 a fair price for gas furnace replacement in Idaho?
Yes. $5,700 is right around what most homeowners in Idaho pay. Anything from $2,160 to $10,340 is inside the normal range for an HVAC company; above $10,340 it is worth getting a second quote.
Why do quotes for the same job vary so much?
Efficiency: 80% AFUE units are cheaper than 95%+ condensing furnaces, which also need PVC venting and a condensate drain. Furnace size (BTU) and variable-speed blowers. Company overhead matters too: a large company with trucks, dispatchers and a warranty department charges more than a one-person shop, and both can be honest prices.
When should I get a second quote?
Any time a quote lands above $10,340, or when the contractor cannot break it into parts, labor and fees. Ask for the itemized version, ask what would change the price, and confirm licensing and insurance. You can also paste the quote into the free QuoteJury checker for an instant second opinion.
Other HVAC jobs in Idaho
- AC capacitor replacement
- AC contactor replacement
- Condenser fan motor replacement
- Furnace or air handler blower motor replacement
- AC refrigerant recharge (R-410A)
- Evaporator coil replacement
- AC compressor replacement
- AC condenser (outdoor unit) replacement
- Full central AC system replacement (~3 tons)
- Furnace ignitor or flame sensor replacement
- Smart thermostat installation
- Single-zone ductless mini-split installation
- HVAC service call and diagnostic fee
Gas furnace replacement in other states
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Sources
- HomeGuide (2025): $3,800–$6,200 nationally
- Angi (2026): $3,800–$10,000 nationally
- Fixr (2025): $4,000–$8,000 nationally
- U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2025 — median hourly wages by state and metro area
About these numbers. Ranges are typical market rates for a licensed, insured contractor, blended from published U.S. cost guides and adjusted with U.S. Bureau of Labor Statistics wage data (OEWS, May 2025) for each state and metro area. They are estimates, not a bid, appraisal or inspection. Real prices move with parts, access, permits and code requirements. The quote checker is AI-powered and labeled as such.