Furnace & heating
AC repair
Heat pumps
Ductless mini splits
Carrier
Trane
GoodmanSeasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Get your free estimateStyles & brands we work with
See the difference
Before
After
Before
After
Before
AfterHow Much Does Furnace Replacement Cost in Alpharetta?
Furnace replacement in Alpharetta, GA typically costs $4,200 to $9,800 for a standard single-family home in 2026, with most homeowners landing between $5,500 and $7,500 for a mid-efficiency unit. The final number depends on furnace size, efficiency rating, and whether ductwork needs modification. A straight swap of an existing furnace in a home under 2,500 square feet usually runs $4,800 to $6,500, while a high-efficiency two-stage unit for a larger Alpharetta home can push past $9,000.
Those numbers include the furnace itself, basic installation labor, removal of the old unit, and standard permits. If you need new ductwork, a relocated furnace, or ventilation upgrades, expect to add $1,500 to $4,000. At Dalton Heating & Air Alpharetta, every replacement quote is written before any work starts, so the number you sign is the number you pay.
Key Takeaways:
- Typical furnace replacement in Alpharetta: $4,200 – $9,800
- Most common price point: $5,500 – $7,500
- High-efficiency units (AFUE 90%+) run $1,500 – $3,000 more than standard-efficiency models
- Written pricing is standard on every Dalton job, no exceptions
- Free estimates: call (229) 537-2086
Furnace Replacement Cost Breakdown (2026)
Here is what a furnace replacement actually costs in Alpharetta right now, broken down by component and by furnace type. These are real market numbers based on current equipment pricing and local labor rates, not national averages padded for margin.
| Cost Component | Typical Range (Alpharetta, GA) |
|---|---|
| Standard-efficiency furnace (80% AFUE) | $1,800 – $2,800 |
| High-efficiency furnace (92 – 96% AFUE) | $2,600 – $4,200 |
| Two-stage or modulating high-efficiency unit | $3,500 – $5,500 |
| Basic installation labor (straight swap) | $1,200 – $2,000 |
| Removal and disposal of old furnace | $150 – $350 |
| Permits and local Alpharetta / Fulton County fees | $100 – $300 |
| New line set, flue, or venting modifications | $300 – $900 |
| Ductwork modifications or partial replacement | $1,500 – $4,000 |
| Thermostat upgrade (smart or programmable) | $150 – $450 |
| Whole-home humidifier add-on | $500 – $1,200 |
Here is the same information framed as complete installed prices, which is how most Alpharetta homeowners see the quote:
- Up to 1,800 sq ft, 80% efficiency, straight swap: $4,200 – $5,500 installed
- 2,000 – 2,800 sq ft, 92 – 96% efficiency, straight swap: $5,500 – $7,500 installed
- 3,000+ sq ft, two-stage high-efficiency, straight swap: $7,000 – $9,800 installed
- Same as above plus new ductwork: add $2,000 – $4,000
One thing worth knowing about the Alpharetta market specifically: many homes built in Windward, Crabapple, and the neighborhoods along Kimball Bridge Road were constructed in the late 1990s and early 2000s. Those furnaces are now 20 to 25 years old and hitting the end of their service life at roughly the same time. That means local installers, including us, are busier than the national average for replacement work, and it also means some of those original furnace closets and vent runs were sized for older, less efficient equipment. Sometimes the existing flue size will not pass code with a new high-efficiency condensing unit, which adds venting work.
What Affects Furnace Replacement Pricing in Alpharetta
- Furnace size (BTU output). Alpharetta winters are mild compared to Minnesota, but homes here still need 40,000 to 100,000 BTU depending on square footage and insulation. A 100,000 BTU unit costs $800 – $1,500 more than a 45,000 BTU unit.
- Efficiency rating (AFUE). An 80% AFUE furnace vents through the existing metal flue. A 95%+ condensing furnace needs PVC venting through a side wall. That venting work alone can add $400 – $900 in labor and materials.
- Single-stage vs. two-stage vs. modulating. A single-stage furnace is either on or off. A two-stage runs at about 65% capacity most of the time and kicks to full output on cold snaps. A modulating unit varies output continuously. Price steps up roughly $800 – $1,200 per tier.
- Your home’s age and duct condition. Homes in the older sections of downtown Alpharetta and along Highway 9 often have ductwork that predates current sizing standards. If the existing return air drop is undersized for a new higher-CFM furnace, the system will short-cycle and overheat. We will not install a furnace on ductwork that cannot handle it. Expect duct modifications on about 1 in 4 Alpharetta replacements.
- Location of the furnace. A furnace in an easily accessible basement or garage utility closet is a half-day job. A furnace crammed into a tight attic in a Crabapple colonial with a narrow pull-down ladder adds 3 – 5 hours of labor and sometimes requires a second technician. That labor differential runs $300 – $800.
- Time of year. December through February is peak demand in Alpharetta. Emergency replacements during a cold snap can run 10 – 20% higher than a planned replacement in October or March, simply because supply houses run leaner inventory and crews work longer days.
How to Save on Furnace Replacement
You do not have to pay the top of any range. Here is what actually moves the number down in the Alpharetta market.
- Replace in the shoulder season. October and March are the cheapest months. Demand drops, supply houses run full inventory, and install crews are not stretched. If your furnace still runs, scheduling a planned replacement in early October can save $500 – $1,000 versus an emergency swap in January.
- Get the right size, not the biggest size. Oversizing a furnace is a common upcharge tactic. An oversized furnace costs more, cycles too often, and dies younger. A proper Manual J load calculation tells you exactly what BTU rating your Alpharetta home needs. If a quote includes a load calculation and another does not, ask why.
- Do not upgrade the thermostat unless you need to. A basic programmable thermostat does the job. A smart thermostat is nice but adds $150 – $450. You can add one later for the same price.
- Ask about utility rebates. Georgia Power and Sawnee EMC, which serves parts of Alpharetta, periodically offer rebates on high-efficiency gas furnace installations. As of 2026, federal tax credits under the Inflation Reduction Act may also offset a portion of qualifying high-efficiency equipment. Rebate programs change, so verify current terms before you commit.
- Bundle the work. If your AC is 15+ years old and you are replacing the furnace anyway, doing both at once saves on labor, permits, and a second visit. A combined HVAC replacement in Alpharetta typically runs $8,500 – $14,000, but it is cheaper than doing them two years apart.
The simplest way to know your exact number is a free in-home estimate. We measure the house, inspect the existing furnace and ductwork, and give you a written price with line items within a day. Call (229) 537-2086 to schedule.
How the Dalton Furnace Replacement Process Works
Here is the step-by-step if you choose us for the job. Every step follows The Garrison Code, which is the operating standard for all home services under the Garrison Partners network since 2003.
- You call or book online. A live person answers 24/7. You tell us the furnace situation, the age of the unit if you know it, and your home’s approximate square footage. We schedule a visit inside a stated window, not a four-hour spread.
- The walkthrough. Marco Benitez or one of our technicians arrives, inspects the existing furnace, checks the ductwork, measures the space, and asks about any cold spots or uneven heating you have noticed. We complete a load calculation so the new unit is sized to the house, not guessed.
- The written quote. Before any work is approved, you get a written price with the furnace model, labor, permits, and any extras itemized. No numbers change at the door. If the scope changes during install, we stop and get written approval before proceeding.
- Installation day. A background-checked, uniformed crew arrives inside the window. The old furnace comes out. The new one goes in. Venting, gas connections, electrical, and condensate drains are done to code. The site is left clean, with the old unit hauled away.
- The walkthrough and guarantee. We test the system, show you the thermostat and filter access, and hand you a written guarantee on the entire job. If anything is not right within 365 days, we return and make it right at no charge.
How Much Does It Cost to Repair vs. Replace a Furnace in Alpharetta?
Alpharetta furnace repairs run $150 – $700 depending on the failed part. A bad ignitor or flame sensor is at the low end. A failed blower motor or control board lands at the high end. A cracked heat exchanger, which is a safety issue, usually means replacement because the part alone often runs $800 – $1,500 on a furnace that is already 15+ years old.
The rule of thumb we give homeowners: if the repair cost multiplied by the furnace’s age exceeds $5,000, replace it. So a $500 repair on a 12-year-old furnace equals $6,000. That money is better spent toward a new unit with a fresh warranty. Here is the quick math:
- Furnace under 10 years old, repair under $500: repair makes sense
- Furnace 10 – 15 years old, repair $500 – $700: borderline; consider the next likely failure
- Furnace over 15 years old, any repair over $400: replacement usually wins over the next 3 – 5 years
- Heat exchanger cracked at any age over 12: replace, do not patch
If you are deciding between repair and replacement, we give you both prices in writing and let you choose. No pressure either way. For full details on our replacement service, see Furnace Replacement in Alpharetta.
Furnace Brands We Install and Service in Alpharetta
Dalton Heating & Air Alpharetta is factory-trained to service nine major residential HVAC brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. We install all of them as well. Brand affects price, but not as much as size and efficiency. A Goodman 80% unit and a Carrier 80% unit of the same BTU will be within a few hundred dollars. The brand matters more at the high-efficiency end, where Trane and Carrier modulating units carry a premium of $700 – $1,200 over comparable Rheem or Goodman two-stage models.
Our recommendation: pick the efficiency and features you want first, then choose the brand that fits the budget. All nine brands have solid warranties (10-year parts coverage on most models when registered), and we stand behind the installation for a full year regardless of brand.
Furnace Replacement Permits in Alpharetta and Fulton County
Alpharetta and Fulton County require a mechanical permit for furnace replacement. The permit cost is typically $100 – $300 and is included in our quotes. The permitting authority inspects the installation after completion, checking gas connections, venting, electrical, and condensate drainage. Our work passes inspection the first time in nearly every case because we do the job by the book, which is a Garrison Standard requirement.
If a contractor tells you a permit is not needed for a full furnace swap in Alpharetta, that is a red flag. Unpermitted work can void your homeowners insurance and complicate a future home sale.
FAQs – Furnace Replacement Cost
How much does a furnace replacement cost in Alpharetta, GA?
A furnace replacement in Alpharetta costs $4,200 – $9,800 installed in 2026, with most homeowners paying $5,500 – $7,500. Call (229) 537-2086 for an exact written quote for your home. Estimates are free.
How long does a furnace replacement take?
A straight furnace swap in Alpharetta takes 4 – 8 hours, typically one full day. If ductwork modifications, venting changes, or a relocation are required, plan on 1.5 – 2 days. We arrive inside the stated window and clean up before we leave.
Is it cheaper to repair or replace a furnace?
If your furnace is under 10 years old and the repair is under $500, repair is usually cheaper. If it is over 15 years old and the repair exceeds $400 – $500, replacement typically saves money within 3 – 5 years. We quote both options in writing and let you decide.
How much does a high-efficiency furnace cost compared to a standard one in Alpharetta?
A high-efficiency (92 – 96% AFUE) furnace costs $1,500 – $3,000 more installed than an 80% AFUE standard unit in Alpharetta. The premium comes from the more expensive condensing unit plus the PVC venting work required. The energy savings typically offset the difference in 5 – 8 years for a 2,500 sq ft home.
Can you replace a furnace the same day in Alpharetta?
Yes, in most cases. Standard-efficiency furnaces in common sizes are usually available from local supply houses same-day or next-day. High-efficiency and two-stage units sometimes require 1 – 3 days for delivery. We prioritize no-heat emergencies and can often have a replacement installed within 24 hours. Call (229) 537-2086 to check current availability.
Do you offer financing for furnace replacement?
Yes. Financing options through third-party lenders are available on approved credit, with terms running 12 to 60 months. We provide the financing details in writing alongside your quote so you can compare monthly payments before committing.
Call Dalton Heating & Air Alpharetta for a Free Furnace Replacement Estimate
You will get a written price before any work starts, a background-checked crew that shows up inside the window, and a full-year written guarantee on the entire installation. That is how we have operated since 2003, and it is not changing.
Call (229) 537-2086 or book through our home page. A live person answers 24/7.
Pricing reflects the Alpharetta market as of 2026. Dalton Heating & Air Alpharetta offers free estimates – call (229) 537-2086.
Written by Marco Benitez, Owner at Dalton Heating & Air Alpharetta, serving Alpharetta since 2003.
What Our Customers Say
"Blower motor died on the coldest night. They had the part on the truck and had us warm again the same day."
- Sandy G."Coil cleaning and a refrigerant check before summer. AC has never been this cold."
- Marty D."Installed a heat pump to replace an old oil furnace. Three clear quotes and the install crew was tidy."
- Cheryl B.