Furnace Replacement cost: Brentwood vs Chattanooga (2026)
In 2026, furnace replacement is about 1% more expensive in Brentwood than in Chattanooga. Most homeowners pay around $5,450 in Brentwood versus $5,400 in Chattanooga — a gap of roughly $50.
Brentwood TN
Typically around $5,450
Chattanooga TN
Lower costTypically around $5,400
Brentwood vs Chattanooga: full breakdown
| Factor | Brentwood | Chattanooga |
|---|---|---|
| Typical 2026 cost | $5,450 | $5,400 |
| Estimated range | $3,900–$7,000 | $3,850–$6,900 |
| Labor index (vs US) | ×0.97 | ×0.96 |
| Climate zone | Mixed | Mixed |
| Climate factor | ×1 | ×1 |
| Local permit | $225 | $200 |
| Labor share | $3,250 | $3,250 |
| Materials/equipment | $2,200 | $2,150 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national furnace replacement range for local labor, climate and permits.
How much should this gap actually matter?
A 1% difference on furnace replacement is minor — you'll typically see a wider spread just from getting multiple quotes in the same city, so don't let location drive the decision.
Furnace replacement by type: Brentwood vs Chattanooga
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 | Brentwood | Chattanooga |
|---|---|---|
| Gas furnace | $3,800–$6,900 | $3,750–$6,800 |
| High-efficiency gas furnace | $3,400–$6,900 | $3,350–$6,800 |
| Electric furnace | $2,150–$4,550 | $2,100–$4,500 |
Localized 2026 planning estimates — not quotes. Each city adjusts the national furnace replacement range for local labor, climate and permits.
Furnace replacement by home size: Brentwood vs Chattanooga
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 | Brentwood | Chattanooga |
|---|---|---|
| 1,000 sq ft (≈45,000 BTU) | $2,950–$5,250 | $2,900–$5,200 |
| 1,500 sq ft (≈68,000 BTU) | $3,400–$6,000 | $3,350–$5,950 |
| 2,000 sq ft (≈90,000 BTU) | $3,900–$7,000 | $3,850–$6,900 |
| 2,500 sq ft (≈110,000 BTU) | $4,500–$7,950 | $4,400–$7,850 |
| 3,000 sq ft (≈130,000 BTU) | $5,050–$8,900 | $5,000–$8,800 |
| 3,500+ sq ft (≈150,000 BTU) | $5,650–$9,900 | $5,550–$9,800 |
Treat these as 2026 localized estimates for furnace replacement, not quotes from a contractor.
What hvac pros earn in each metro
About 60% of a furnace replacement bill goes to labor, so wage differences between these two metros matter more than almost anything else. These are real, government-sourced (BLS OEWS) installer wages, not estimates.
Nashville-Davidson--Murfreesboro--Franklin metro · about 6% below the US average installer wage.
No BLS metro wage series for Chattanooga; we use Tennessee regional price parity instead.
Source: U.S. Bureau of Labor Statistics, OEWS metro wages for HVAC installers (used as a trade-labor index).
Cheapest time for furnace replacement in either city
Installers cut prices in spring and fall because job volume drops and crews sit idle — the opposite happens during a summer heat wave or winter cold snap, when a dead system forces homeowners into a full-price emergency swap.
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 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.
The efficiency-first case
Where you face brutal summers or hard winters, a higher SEER2/AFUE system or a heat pump runs enough hours to claw back its premium through lower bills — and utility or state rebates can still trim the sticker even though the federal 25C/25D credits closed at the end of 2025. Do the payback arithmetic before you reach for the cheapest box on the lot.
The longevity case
Brand is a footnote; sizing and install quality write the story. A right-sized mid-tier system that's properly commissioned and serviced once a year will outlive an oversized premium unit that short-cycles itself to an early grave. Put the money into the crew and the setup rather than the nameplate.
Match the efficiency tier to your climate, insist on a real load calculation, and stack every rebate you qualify for. The expensive mistakes are wrong sizing and a rushed install — not picking the "wrong" brand.
Brentwood vs Chattanooga
Is furnace replacement cheaper in Brentwood or Chattanooga?
Yes — Brentwood costs more. Expect around $5,450 for furnace replacement there against $5,400 in Chattanooga, about $50 (1%) apart in 2026.
Why does furnace replacement cost more in Brentwood than Chattanooga?
Brentwood's higher labor index (0.97 vs 0.96 in Chattanooga) is the biggest factor, with the mixed/mixed climate split and permit fee differences playing a smaller role.
How much is furnace replacement in Brentwood, TN?
furnace replacement in Brentwood runs $3,900–$7,000 as of 2026 — most jobs land near $5,450.
When is the cheapest time to buy furnace replacement — and does it differ by city?
No, the seasonal pattern is the same in Brentwood and Chattanooga: book during Spring and fall (Mar–May, Sep–Oct) for about 5–15% in savings. Peak summer and mid-winter is the priciest stretch in both cities, mostly due to emergency replacements.
Should I choose where to live based on furnace replacement cost?
Rarely. The $50 difference is real but one-time, and you can often close most of it in Brentwood by buying in the off-season and getting tighter, apples-to-apples bids. Ongoing factors — energy prices, climate and home condition — matter more over the life of the system.
Compare furnace replacement in other cities
Updated June 2026 · By Serhat Özçelik