Furnace Replacement cost: Boise vs Nampa (2026)
Boise and Nampa are a near-perfect match on furnace replacement cost in 2026, both landing around $5,850.
Boise ID
Typically around $5,850
Nampa ID
Typically around $5,850
Boise vs Nampa: full breakdown
| Factor | Boise | Nampa |
|---|---|---|
| Typical 2026 cost | $5,850 | $5,850 |
| Estimated range | $4,150–$7,500 | $4,150–$7,500 |
| Labor index (vs US) | ×0.96 | ×0.96 |
| Climate zone | Cold | Cold |
| Climate factor | ×1.08 | ×1.08 |
| Local permit | $200 | $200 |
| Labor share | $3,500 | $3,500 |
| Materials/equipment | $2,350 | $2,350 |
Furnace replacement numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
No real cost edge either way
With no real price gap on furnace replacement, the choice comes down to contractor quality and timing, not which city you're in.
Furnace replacement by type: Boise vs Nampa
Each furnace replacement option, priced separately for both metros — the same local labor, climate and permit adjustments applied per city, so you can compare like for like.
| Type | Boise | Nampa |
|---|---|---|
| Gas furnace | $4,050–$7,400 | $4,050–$7,400 |
| High-efficiency gas furnace | $3,650–$7,400 | $3,650–$7,400 |
| Electric furnace | $2,300–$4,900 | $2,300–$4,900 |
Furnace replacement numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Furnace replacement by home size: Boise vs Nampa
Furnace cost scales with the heating capacity (BTU) your home needs — roughly 40–45 BTU per square foot in a mixed climate. Larger homes need a bigger unit and more ductwork.
| Size | Boise | Nampa |
|---|---|---|
| 1,000 sq ft (≈45,000 BTU) | $3,100–$5,600 | $3,100–$5,600 |
| 1,500 sq ft (≈68,000 BTU) | $3,650–$6,450 | $3,650–$6,450 |
| 2,000 sq ft (≈90,000 BTU) | $4,150–$7,500 | $4,150–$7,500 |
| 2,500 sq ft (≈110,000 BTU) | $4,800–$8,550 | $4,800–$8,550 |
| 3,000 sq ft (≈130,000 BTU) | $5,400–$9,550 | $5,400–$9,550 |
| 3,500+ sq ft (≈150,000 BTU) | $6,050–$10,600 | $6,050–$10,600 |
Treat these as 2026 localized estimates for furnace replacement, not quotes from a contractor.
Cheapest time for furnace replacement in either city
Demand for HVAC work falls off a cliff in the shoulder months, and contractors discount to keep their crews booked. Wait for a 100-degree day or a hard freeze, though, and you're paying emergency rates for a system that just quit.
How much should you really budget for HVAC in 2026?
Ask five contractors for an HVAC quote and you'll get five different numbers — usually because they disagree on sizing, efficiency and equipment tier. Here's how our editors think through those trade-offs.
The longevity case
The single biggest cost driver isn't the brand — it's correct sizing and install quality. A properly sized, well-commissioned mid-tier system with annual maintenance outlasts an oversized premium unit that short-cycles. Spend on the install, not the badge.
The efficiency-first case
In a hot-summer or cold-winter region, a higher SEER2/AFUE unit — or a heat pump — earns its premium back in lower bills, and utility and state rebates can still cut into the sticker (the federal 25C/25D credits ended Dec 2025). Run the payback math before defaulting to the cheapest box.
The budget-first case
Size the system to your home with a Manual J calculation and buy the standard efficiency tier (80% AFUE / 14.3 SEER2). In a mild climate the cheaper unit pays off because you rarely run it hard — paying for premium efficiency you won't use is the most common way to overspend.
Skip the brand debate. A correctly sized system, an efficiency tier that fits your climate, and a properly commissioned install will save you more than any label ever could.
Boise vs Nampa
Is furnace replacement cheaper in Boise or Nampa?
Not really — both cities land at almost the same number for furnace replacement, around $5,850 each.
Why does furnace replacement cost more in Nampa than Boise?
It comes down to labor: Nampa indexes at 0.96 against Boise's 0.96. The cold-vs-cold climate difference adds to the gap.
How much is furnace replacement in Boise, ID?
In Boise, furnace replacement typically runs $4,150–$7,500 in 2026, with most homeowners paying around $5,850.
When is the cheapest time to buy furnace replacement — and does it differ by city?
The best window is the same in both Boise and Nampa: Spring and fall (Mar–May, Sep–Oct), when demand drops and installers discount to keep crews busy — typically 5–15% off peak pricing. The most expensive time anywhere is an emergency replacement during peak summer and mid-winter.
Should I choose where to live based on furnace replacement cost?
There's no cost argument here between Boise and Nampa — they're a wash. Focus on contractor reputation, project scope, equipment tier and timing.
Compare furnace replacement in other cities
Updated June 2026 · By Serhat Özçelik