HVAC · Brentwood, TN
How much does furnace replacement cost in Brentwood, TN? (2026)
In Brentwood, furnace replacement runs $3,900–$7,000, with most paying around $5,450 — about 1% above the national average. Replacing a residential furnace, including the unit and installation labor.
Updated June 2026 · Localized estimate, not a quote
Most homeowners pay around $5,450
- Typical cost
- $5,450
- Labor vs US
- −3%
- Climate
- Mixed
- Local permit
- $225
Refine your estimate
Tune it to your home to narrow the furnace replacement range.
Key takeaways for Brentwood
- Most Brentwood homeowners land around $5,450 for furnace replacement, within a $3,900–$7,000 range that sits about 1% above the national average.
- Brentwood labor runs −3% versus the US average — the main reason the local price differs from the national figure.
- Around $225 of the range above goes to the local HVAC permit, not an extra line item.
- Schedule the replacement early — this typically holds up 15–30 years, and an emergency swap costs full price.
- Time it right and you can save 5–15%: the best window to book is Spring and fall (Mar–May, Sep–Oct).
- The estimate above is before incentives; federal 25C/25D credits and utility rebates below can reduce what you actually pay.
What goes into the price in Brentwood
A typical Brentwood furnace replacement of $5,450 breaks down roughly like this — materials priced near the national level, labor set by local rates.
| Line item | Brentwood 2026 range |
|---|---|
| Materials & equipmentHardware and supplies for the job; national pricing applies almost everywhere you go. | $1,450 – $2,700 |
| Labor & installationRemoval, install and startup labor — the line most affected by where you live. | $2,225 – $4,075 |
| Permit & feesTypical local HVAC permit, scaled to this metro. | $225 |
| Total installed cost | $3,900 – $7,000 |
Split from the Brentwood estimate using a 60% local-labor share; line items sum to the total.
Why furnace replacement costs what it does in Brentwood
- Brentwood's labor rates sit about 3% lower than the national average (based on price levels for the Nashville-Davidson--Murfreesboro--Franklin metro area), pushing the price down.
- Brentwood's HVAC permit runs roughly $225, which is already part of the number above.
Furnace Replacement cost by home size in Brentwood
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.
| home size | Brentwood 2026 range |
|---|---|
| 1,000 sq ft (≈45,000 BTU) | $2,950 – $5,250 |
| 1,500 sq ft (≈68,000 BTU) | $3,400 – $6,000 |
| 2,000 sq ft (≈90,000 BTU) | $3,900 – $7,000 |
| 2,500 sq ft (≈110,000 BTU) | $4,500 – $7,950 |
| 3,000 sq ft (≈130,000 BTU) | $5,050 – $8,900 |
| 3,500+ sq ft (≈150,000 BTU) | $5,650 – $9,900 |
National size ranges localized to Brentwood labor and climate.
Furnace Replacement cost by type in Brentwood
| Gas furnace | $3,800 – $6,900 |
| High-efficiency gas furnace | $3,450 – $6,900 |
| Electric furnace | $2,150 – $4,600 |
Adjusted to Brentwood from national type-level ranges.
Furnace Replacement cost by efficiency in Brentwood
Efficiency is measured in AFUE — the percentage of fuel turned into heat. Higher AFUE costs more upfront but cuts fuel bills, and in cold (northern) regions the DOE requires ≥95% AFUE gas furnaces.
| 80% AFUE (standard)Lowest upfront; fine in mild climates | $3,100 – $5,550 |
| 90–95% AFUE (high-efficiency)Best all-round value in most regions | $3,900 – $7,000 |
| 96%+ AFUE (condensing, premium)Lowest fuel bills; required in cold zones | $5,050 – $9,400 |
Labor vs. materials in Brentwood
Install crew, removal, permit & startup — the part Brentwood rates move most.
Equipment & materials — priced closer to the national level.
Split based on a typical $5,450 Brentwood project; your mix varies with scope.
Skilled installers in the Nashville-Davidson--Murfreesboro--Franklin area earn about $29.4/hr (6% below the US average, per BLS metro wage data) — the local wage is what moves the labor half of your furnace replacement cost.
How we estimate it
| National range | $3,800 – $7,000 |
| Brentwood labor adjustment | ×0.97 |
| mixed climate factor | ×1 |
| Local permit | +$225 |
| Brentwood estimate | $3,900 – $7,000 |
Promo prices vs. the real cost
A cheap headline number is usually a hook to get a technician in the door, not the price of the job. Compare it against the real installed estimate above:
- Financing offers$0 down · 0% APR, 12–60 mo
- Service call / diagnostic fee$75–$150
- Seasonal tune-up promo$79–$129
- "Free" replacement estimate$0 — it's a sales visit
Additional furnace replacement costs to budget for
Expect a few of these rather than all. Which ones apply tracks with access, hidden damage and local code.
| Old furnace removal & disposal | $50 – $330 |
| New ductwork (vs. repair $300–$1,500)Only if ducts are missing or failing | $1,000 – $5,000 |
| Gas line run or upgrade | $250 – $800 |
| Chimney liner (for high-efficiency venting) | $600 – $2,500 |
| Smart thermostat | $150 – $500 |
Typical national add-on ranges; confirm locally during your quote.
What's included
- Removal and disposal of the old unit
- Thermostat connection and system startup/testing
- Installation labor and basic ductwork connections
- The furnace unit and burner assembly
What affects the cost
- Whether a chimney liner or new gas line is required
- Heating capacity (BTU) needed for your square footage
- Fuel type (gas vs electric) and AFUE efficiency rating
- Condition of existing ductwork and venting
Ways to save on furnace replacement in Brentwood
- Right-size the unit; oversizing wastes money and cycles hard
- Look for utility rebates on high-efficiency models
- Schedule in the off-season (spring/summer) for better rates
- Get at least 3 quotes — installed prices vary widely
How long does furnace replacement last in Brentwood?
Gas furnaces typically last 15–20 years; well-maintained units can reach 30.
An annual tune-up keeps efficiency up and protects the warranty.
Signs you need furnace replacement in Brentwood
- The furnace is 15+ years old (near or past its service life)
- Heating bills keep climbing despite no change in usage
- Some rooms are warm while others stay cold (uneven heating)
- Frequent repairs — you've called for service more than once or twice recently
- Banging, rattling or screeching noises on startup
- A yellow or flickering burner flame instead of steady blue (have it checked immediately)
- More dust, dryness, or a stale smell when the heat runs
Repair or replace in Brentwood?
Repair if…
- The unit is under ~10 years old and otherwise efficient
- The fix is a single inexpensive part (igniter, flame sensor, capacitor)
- It's still under manufacturer warranty
Replace if…
- It's 15+ years old and needs a major part
- The heat exchanger is cracked (a safety issue — replace, don't repair)
- The repair costs more than about half of a new system
- It's an 80% AFUE unit and your fuel bills are high in a cold climate
Rebates & incentives in Tennessee
Most 2026 rebates reward switching to a heat pump, not a like-for-like gas furnace. Replacing a gas furnace, your savings are mainly utility efficiency rebates (high-AFUE models) — but pricing out a heat pump often qualifies you for far larger rebates.
The federal 25C tax credit (up to $2,000 for heat pumps; $600 for high-efficiency AC or furnaces) and the 25D credit ended December 31, 2025 under the One Big Beautiful Bill Act — neither is available for 2026 installs. The remaining federal help is the IRA Home Electrification & Appliance Rebates (HEAR): up to $8,000 toward a heat pump for households under 150% of area median income, paid at point of sale where a state has launched its program.
Verified July 2026. Rebate budgets deplete and program windows change fast — confirm current amounts and eligibility with your utility and the DSIRE database before you budget. Costadia does not administer these programs.
Cheapest time for furnace replacement in Brentwood
Crews are busiest — and priciest — exactly when it's hottest or coldest, since that's when systems fail under load. Book in the mild months and you're negotiating from a position of choice, not a broken furnace.
Why furnace replacement quotes vary — and how to compare them fairly
One bid high, one low, same house? The variable is scope. Here's what pushes the figure up or down and how to get quotes you can actually compare.
Why a quote looks high (or low)
- Equipment tier isn't matched — a 14.3 SEER2 bid will always undercut an 18 SEER2 one for the "same" job.
- One quote bundles ductwork, electrical, permit and old-unit removal; another quietly leaves them out.
- Brand, warranty length and whether startup/commissioning is included all move the number.
Get an apples-to-apples bid
- Confirm old-unit removal, the permit and startup testing are all included.
- Get at least three written bids before you sign.
- Require an itemized quote splitting equipment, labor, permit and add-ons.
- Ask every bidder for the same SEER2/AFUE rating so you compare like for like.
Questions to ask Brentwood HVAC pros
A fair comparison starts with identical questions. Ask each contractor the following before anything gets signed.
- 1Did you run a Manual J load calculation to size the system, or estimate from square footage?
- 2What AFUE/SEER2 rating is this unit, and what's the payback vs. the next tier up?
- 3Is removal of the old equipment, the permit, and startup testing included in the quote?
- 4Will my existing ductwork and venting work as-is, or is repair/resizing needed?
- 5What's covered under the labor warranty vs. the manufacturer's parts warranty?
Furnace Replacement in Brentwood
How much does furnace replacement cost in Brentwood, TN?
Brentwood's going rate for furnace replacement is $3,900–$7,000 in 2026, with $5,450 the number most homeowners end up paying. That's not a national average — it's adjusted for Brentwood labor rates, mixed-climate factors and permit fees.
Is furnace replacement more expensive in Brentwood than average?
Compared with the rest of the country, Brentwood runs about 1% higher than the national average — local labor prices at an index of 0.97 against the US average., before the HVAC permit, which runs about $225.
Do I need a permit for furnace replacement in Brentwood?
In Brentwood, this usually needs a HVAC permit (around $225). The estimate above already accounts for it.
What affects furnace replacement cost the most?
In plain terms, replacing a residential furnace, including the unit and installation labor. Grade of equipment and materials tops the list, followed by home size and complexity, local labor, and the mixed climate zone.
How much should you really budget for HVAC in 2026?
Sizing, efficiency tier and brand pull a quote in different directions. Here's how our editors weigh the trade-offs that decide what you actually pay.
The efficiency-first case
High runtime changes the math. In a demanding climate the extra efficiency of a heat pump or a top-tier SEER2/AFUE unit gets paid back month after month on the utility bill, and state and utility incentives can shave the upfront figure further now that the federal 25C/25D credits have expired. Price the lifetime bills, not just the tag, before you default down.
The budget-first case
Run a Manual J load calculation, then buy the standard tier — 80% AFUE, 14.3 SEER2 — and stop there. Where summers are short and winters are gentle, the equipment idles most of the year, so premium efficiency never gets enough runtime to earn back its price. Paying for SEER2 you'll rarely tap is the classic way a mild-climate homeowner overspends.
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.
Climate decides the efficiency tier; a proper load calculation decides everything else. Nail both, stack the rebates you can, and you've sidestepped the two mistakes — wrong size, rushed install — that actually inflate the lifetime cost.
Editorial analysis by Serhat Özçelik, reviewed by Costadia Editorial. These are our own cost perspectives, not third-party endorsements.
How we calculated this estimate
We start with 2026 national furnace replacement ranges compiled from contractor-pricing sources (Angi, HomeGuide, Fixr and EnergySage averages), then localize them to Brentwood using the BLS metro wage data labor index (×0.97 here), the IECC mixed-climate factor (×1) and a typical local permit fee (≈$225). Federal incentive details reference the IRS Inflation Reduction Act (25C/25D) and DSIRE.
This is a planning estimate, not a quote.Actual prices vary with your home's condition, equipment grade and contractor — always confirm with licensed local pros before budgeting.
References & data sources
Our Brentwood furnace replacement estimate is built from these primary, mostly government sources — not a single aggregator.
- Occupational Employment & Wage Statistics (metro wages) — U.S. Bureau of Labor Statistics.Metro-level trade wages behind each city's labor index.
- Regional Price Parities (state & metro) — U.S. Bureau of Economic Analysis.Regional price levels used where metro wage data is unavailable.
- IECC Climate Zones — U.S. DOE — Building Energy Codes Program.Climate-zone factors applied to weather-sensitive projects.
- Home Energy Tax Credits (25C / 25D) — Internal Revenue Service.Federal rebate and tax-credit figures for eligible upgrades.
- Database of State Incentives for Renewables & Efficiency — DSIRE — NC State University.State and utility incentive programs by ZIP code.
Furnace replacement alternatives in Brentwood
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Bundling these shares labor and setup — and a single visit.
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