Furnace Replacement Cost - What It Actually Costs, Quoted Free

How Much Does Furnace Replacement Cost in Miami?

Furnace replacement in Miami typically runs between $3,900 and $8,800 for a complete system swap, including equipment and labor. Most homeowners in neighborhoods like Kendall, Coral Gables, and Doral pay around $5,500 to $6,500 for a mid-efficiency gas furnace sized for a 1,800 to 2,400 square foot home. High-efficiency models (90%+ AFUE) from brands like Carrier, Trane, or Lennox push the upper end of that range, while budget-conscious replacements using Goodman or Rheem units land closer to the bottom. The final number depends on furnace size, efficiency rating, ductwork condition, and the complexity of the installation.

If you’re wondering whether to repair or replace, a quick rule of thumb: when a repair quote exceeds $1,500 and your furnace is over 15 years old, replacement usually makes more financial sense. We walk through that math in the FAQ section below.

Cold Harbour Heating and Air Miami has been handling furnace replacements across Miami-Dade County since 2003, and we work under the Kingswell Guarantee: a written price before the work starts, a firm arrival window, and a 365-Day Done Right Promise on every installation.

Furnace Replacement Cost Breakdown (2026)

Here’s the line-item picture of what a furnace replacement costs in Miami right now. These numbers reflect our pricing on jobs we’ve quoted in the past 12 months across the metro area, from Hialeah to Palmetto Bay.

Line Item	Low End	High End	Typical
Mid-efficiency furnace (80% AFUE)	$1,400	$2,800	$1,900 – $2,300
High-efficiency furnace (90 – 96% AFUE)	$2,600	$4,500	$3,200 – $3,800
Standard installation labor	$1,500	$3,200	$2,000 – $2,600
Complex install (new venting, gas line reroute)	$800	$2,500	$1,200 – $1,800
Ductwork modifications or repair	$250	$1,800	$600 – $1,000
Thermostat upgrade (smart or programmable)	$120	$480	$200 – $300
Permit fees (Miami-Dade County)	$150	$450	$200 – $350
Old furnace removal and disposal	$100	$300	$150 – $220
Total replacement cost	$3,900	$8,800	$5,500 – $6,500

Those totals assume a standard gas furnace swap with no major ductwork surprises. Miami has its own wrinkle: many homes built before the 1990s in neighborhoods like Little Havana and Coconut Grove still run on closeted vertical furnaces or through-the-wall units, and replacing those often costs more because the install crew has to reconfigure venting and combustion air intake to meet current Florida Building Code.

What Affects Furnace Replacement Pricing in Miami

• Furnace size and BTU rating. A 60,000 BTU furnace for a 1,200 square foot condo in Brickell runs less than a 100,000 BTU unit for a 2,800 square foot home in Pinecrest. Bigger unit, bigger price.
• Efficiency rating (AFUE). An 80% AFUE unit costs less up front but burns more gas. A 96% two-stage unit costs $1,400 to $2,200 more on equipment, and you’ll make part of that back on utility bills over the life of the unit.
• Venting configuration. If your existing furnace vents through the roof and you’re switching to a high-efficiency model, the install team has to run PVC venting through an exterior wall. In Miami’s humid climate, we also add a condensate drain line that ties into your existing AC drainage.
• Brand choice. Goodman and Rheem furnaces consistently come in 20 – 30% lower than comparable Carrier, Trane, or Lennox equipment. Our technicians are trained on all nine major residential brands, including York, Daikin, Bryant, and American Standard, so you’re not locked into whatever a single-dealer shop wants to push.
• Ductwork condition. About a third of the replacements we do in older Miami homes need some duct repair or sealing. Corroded sheet metal in crawl spaces near the coast is common, especially in waterfront areas like Key Biscayne and North Bay Village.
• Permit and inspection requirements. Miami-Dade County requires a mechanical permit for furnace replacement, and several municipalities add their own inspection layer. We handle all of that paperwork, but the fees are pass-through costs on your invoice.

How to Save on Furnace Replacement

Replacing a furnace is a big check to write. Here’s what actually moves the number down without cutting corners on safety or quality.

1. Time the replacement for the off-season

Everyone thinks about furnaces when a cold snap hits in January. But Miami’s heating season is short, and our install calendar is far more flexible from March through October. You won’t get a discount for scheduling in July, but you’ll have more room to negotiate on equipment upgrades and get the exact unit you want instead of whatever’s in stock mid-February.

2. Get a written, line-item quote before you commit

Any reputable company should hand you a written price before work begins. That’s not a courtesy, it’s our standard operating procedure under the Kingswell Way. If a contractor won’t itemize the equipment, labor, permit fees, and disposal charges, walk. A written quote also protects you from the door price creep that is unfortunately common in this industry.

3. Ask about efficiency rebates

Florida Power & Light runs seasonal rebate programs for high-efficiency gas furnace installations, typically ranging from $150 to $400. These change year to year, but they’re worth checking when you compare quotes. The rebate comes after the install and directly lowers your net cost.

4. Consider an 80% AFUE unit if you’re in a smaller home

Miami has a mild heating season. If you live in a condo or a modest home where the furnace runs maybe 200 hours a year, the payback on a 96% AFUE unit can stretch past 12 years. That’s longer than many homeowners stay in the house. We will give you honest math on this, not a push toward the pricier model.

5. Bundle the thermostat and duct sealing

Adding a smart thermostat and basic duct sealing during the replacement costs less than doing them separately later, since the tech is already on site and the system is open. Most companies charge a separate trip fee and markup for those as standalone jobs.

6. Get multiple estimates, but compare apples to apples

Three quotes are useful. What is not useful is comparing a quote that includes a new thermostat, permit fees, and a full duct inspection against one that conveniently leaves those out. We recommend asking each company the same question: “Does this quoted price include permits, disposal, and any ductwork work required for the new furnace to operate properly?”

Cold Harbour Heating and Air Miami gives free estimates on furnace replacement. Call (850) 810-1910 and we will send a technician to measure your home, check your ductwork, and hand you a written price before leaving. No deposit, no obligation.

Our Furnace Replacement Process

Here is exactly how a furnace replacement works when you hire us. This is the same process we have followed since Cold Harbour was founded in 2003, and it exists so there are no surprises on install day.

Step 1: In-home assessment and measurement

A technician visits your home, measures the square footage, inspects the existing furnace and ductwork, checks gas line sizing, and evaluates venting. This takes 45 to 90 minutes. We calculate the correct furnace size using a Manual J load calculation, not a guess based on the old unit’s rating.

Step 2: Written quote with line items

Before leaving, you get a written quote that breaks down equipment cost, labor, permits, disposal, and any ductwork work. That price does not change at the door. It is the same number on install day, guaranteed by the Kingswell Way.

Step 3: Permitting and scheduling

We pull the mechanical permit from Miami-Dade County (or your municipality) and schedule installation. Most furnace replacements are completed in one day. We give you a firm arrival window, and if we’re running late, a live person calls you. Phones are answered 24/7, every day of the year.

Step 4: Installation and cleanup

Our background-checked, uniformed technicians remove the old furnace, install the new one, run new venting if required, tie in gas and electrical, and connect the thermostat. We test the full system, verify carbon monoxide readings, and walk you through the new unit’s operation. Then we clean the work area. The Kingswell Way says leave the place cleaner than found, and we take that literally.

Step 5: Written guarantee and follow-up

Every furnace replacement includes the 365-Day Done Right Promise. That’s a written guarantee. If anything fails in the first year, we come back and fix it at no charge. Not a pro-rated warranty, not a verbal assurance, a written commitment.

Furnace Replacement vs. Repair: The Miami Math

Miami furnace repair runs $175 to $825 per visit, based on our pricing across the metro area. A replacement runs $3,900 to $8,800. The decision usually hinges on two factors: age and repair cost.

Here is the formula we use with our customers, and it is one you can apply whether you hire us or not:

• If your furnace is under 10 years old and the repair is under $600, repair it.
• If your furnace is 10 to 15 years old and the repair is under $1,000, repair it but start budgeting for replacement.
• If your furnace is over 15 years old and the repair is over $1,200, replacement is almost always the better financial option.

The logic: a 15-year-old furnace that needs a $1,200 heat exchanger repair will likely need another major repair within 18 to 24 months. Two large repairs on an old system cost more than a new furnace, and you still have the same aging infrastructure around it.

One more Miami-specific note: salt air. Homes within three miles of Biscayne Bay or the Atlantic see accelerated corrosion on furnace burners, gas valves, and control boards. A furnace that is 12 years old in Coral Gables may look like a 20-year-old furnace from a climate perspective. We see this constantly, and it shortens the effective lifespan of coastal equipment.

Miami Neighborhoods We Serve

Cold Harbour Heating and Air Miami performs furnace replacements across all of Miami-Dade County. We’re regularly in:

• Kendall and Doral: Predominantly 1990s and 2000s construction with standard vertical furnace closets. Straightforward replacements, usually one day.
• Coral Gables and Coconut Grove: Older homes, often with through-the-wall units or small mechanical closets. Requires more venting reconfiguration.
• Hialeah and Miami Lakes: Mix of older and newer construction. Gas line sizing issues are common in pre-1980 homes.
• Palmetto Bay, Pinecrest, and Cutler Bay: Larger single-family homes, frequently with two systems. Bigger furnaces, longer installs.
• Brickell, Edgewater, and Downtown condos: Condo associations often have specific equipment and noise requirements. We coordinate with building management as needed.

Wherever you are in Miami-Dade, the process is the same. Call for a free estimate, get a written price, and get your furnace replaced by a crew that shows up when promised.

FAQs – Furnace Replacement Cost

How much does furnace replacement cost in Miami in 2026?

Furnace replacement in Miami costs $3,900 to $8,800 for a complete installation. Mid-range installations for typical single-family homes run $5,500 to $6,500, which includes the furnace, labor, permits, and disposal. Call (850) 810-1910 for a free written estimate on your specific home.

Is it cheaper to repair or replace a furnace?

Repairs in Miami run $175 to $825. The break-even rule we recommend: if your furnace is over 15 years old and the repair exceeds $1,200, replacement is usually cheaper over the next three to five years. Two major repairs on an aging unit often cost more than a new furnace.

How long does a furnace replacement take?

Most furnace replacements take one day, typically 6 to 10 hours. Complex jobs, like converting an older Coral Gables home from through-the-wall venting to high-efficiency PVC venting, can run into a second day. We give a firm arrival window before install day and a live person answers the phone if anything changes.

What size furnace do I need for my Miami home?

As a rough guide, a 1,200 to 1,600 square foot home needs a 60,000 BTU furnace, a 1,800 to 2,400 square foot home needs 80,000 BTU, and a 2,600 to 3,200 square foot home needs 100,000 BTU. But a proper calculation accounts for ceiling height, window area, insulation, and orientation. We perform a Manual J load calculation on every estimate at no charge.

Do I need a permit to replace a furnace in Miami?

Yes. Miami-Dade County requires a mechanical permit for furnace replacement, and permit fees typically run $150 to $450 depending on the scope. We pull the permit and handle inspections as part of the installation. A contractor who skips the permit saves you a small fee now and creates a much larger problem when you sell the home.

Are high-efficiency furnaces worth the extra cost in Miami?

For most Miami homes, an 80% AFUE unit makes more financial sense than a 90 – 96% model. Our heating season is short. If your furnace runs 150 to 250 hours per year, the premium for high efficiency (typically $1,400 to $2,200 more) takes 10 to 15 years to pay back. High-efficiency units make sense for larger homes or homeowners planning to stay put for 15+ years.

Can you replace my furnace today?

Emergency same-day furnace replacement is not realistic on most jobs, but we can often have a new furnace installed within 3 to 7 days of your estimate. If your furnace is down and you need heat tonight, call (850) 810-1910. A live person answers 24/7, and we will get a technician out to diagnose the issue and discuss your fastest replacement path.

Why Miami Homeowners Choose Cold Harbour Heating and Air

The name comes from an old idea. A cold harbour was a roadside shelter where travelers waited out the weather, a place to get warm before moving on. Comfort in any season is the job. That is what Victor Mancini set out to build when Cold Harbour Heating and Air joined the Kingswell network in 2003.

We operate as an independently owned and operated member of the Kingswell network. That structure matters. It means we’re accountable to a written standard: say the price before the work, show up in the window given, leave the place cleaner than found, put the guarantee in writing, and come back if it fails. We call it the Kingswell Way, and it is not a marketing slogan. It is the operating manual.

Every furnace replacement includes the 365-Day Done Right Promise. If anything related to the installation fails within a full year, we return and correct it at no charge. Written on paper, handed to you before the technician leaves.

Our technicians are background-checked and uniformed. They are trained to service nine major residential HVAC brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. That brand span matters when you’re replacing a furnace: we’re not steering you toward a single brand because it happens to be the one we stock. We quote what fits your home and budget.

If you already know it is time to replace, our Furnace Replacement in Miami page walks through the full installation process and what to expect on install day. If you’re still deciding between repair and replacement, start with a free estimate. We measure, we quote, we hand you the number in writing, and you decide from there.

Ready for a number? Call (850) 810-1910. A live person answers, 24 hours a day, 7 days a week. No voicemail trees, no callback promises. Just a straight answer and a free estimate.

Written by Victor Mancini, Owner at Cold Harbour Heating and Air Miami, serving Miami-Dade County since 2003.

Pricing reflects the Miami market as of 2026. Cold Harbour Heating and Air Miami offers free estimates – call (850) 810-1910.