Furnace Replacement Cost in Roswell, Georgia
Expect to pay $4,100 to $9,900 for furnace replacement in Roswell, GA. Most homeowners end up near $7,300, depending on the equipment tier and how much of the old setup can be reused.
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Roswell Weather and HVAC Load
NOAA's 1991-2020 climate normals put Roswell at 2,980 heating degree days and 1,728 cooling degree days per year. Neither season dominates in Roswell. That balance is a big reason heat pumps and dual-fuel systems sell well in Georgia. On average, Roswell gets 49 freezing nights and 53 days above 90°F per year. For a 2,000 sq ft house, this climate points to a heating load somewhere near 45,000 BTU/h. Treat that as a starting number. A Manual J calculation will move it up or down based on insulation and windows.
| Heating degree days / year | 2,980 |
|---|---|
| Cooling degree days / year | 1,728 |
| Nights at or below 32°F | 49 |
| Days above 90°F | 53 |
| Average low / high | 51.1°F / 71.8°F |
Roswell Housing Stock
The median Roswell home dates to 1989, according to the Census ACS. That makes the typical house about 37 years old. Plenty of houses from this period still run original 1990s or early-2000s equipment, which is past its expected service life. Owners live in 71.2% of occupied homes, roughly 25,000 households. Homes here have a median value of $520,500 and households a median income of $124,422. Those two numbers drive the labor adjustment in our estimate.
Fulton County had 11 hail days and 52 days with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. The largest hail reported was 1.75 inches across. Hail flattens the thin aluminum fins on condenser coils and cuts airflow. After a big storm, take a look at the outdoor unit; homeowners insurance often covers the damage. Fulton County also had 3 tornado days in that period.
When Replacement Makes Sense
- Gas or electric bills keep climbing even though usage hasn't changed
- A repair quote runs past a third of the cost of a new unit
- A tech found a cracked heat exchanger, or the CO detector has gone off
- The furnace is 15 to 20 years old or more
What Moves the Price
- New PVC venting if you move to a condensing model
- Condition of the existing ductwork and any changes it needs
- AFUE rating: a basic 80% unit vs. a 96% condensing furnace
- BTU size, which should come from a Manual J load calculation
- Single-stage, two-stage or modulating gas valve
- Permit and inspection fees, which the local building department sets
We raised the national figures about 27% for Roswell using local income, home values and the equipment size this climate needs. Real bids can still come in outside the range, so collect three written quotes.
What the Quote Should Cover
- Removing and hauling away the old furnace
- Combustion and safety tests
- Gas line and vent connections
- The permit and the manufacturer warranty registration
- The new furnace, filter rack and thermostat wiring
Georgia Permits, Efficiency Rules and Rebates
Georgia is in the DOE's Southeast region, where new split central air conditioners need at least 14.3 SEER2 (13.8 SEER2 for systems of 45,000 BTU/h and up). Plan on a mechanical permit for most replacements in Roswell; the contractor normally pulls it. Before you sign, ask each bidder for their Georgia license or registration number and proof of insurance. The federal 25C tax credit ended for equipment installed after December 31, 2025, so incentives now come mostly from utilities and state programs. Check your electric and gas utility's rebate page before you pick equipment.
Before You Hire
- Ask for the Manual J load calculation in writing. Oversized furnaces are the most common mistake we see.
- Replace it in early fall if you can. A no-heat emergency in January costs more and leaves you fewer choices.
- Make sure all three quotes are for the same AFUE and staging, or you can't compare them.
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Furnace Replacement Questions from Roswell Homeowners
How much is furnace replacement in Roswell?
Plan on $4,100 to $9,900, with most jobs near $7,300. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule furnace replacement in Roswell?
In spring or fall. Those are the slow months between heating and cooling season in Roswell.
How long does a furnace replacement take?
A straight swap is usually done in one day, somewhere between 4 and 10 hours. Moving to a condensing furnace with new PVC venting can add a few more.
Is a high-efficiency furnace worth it?
In cold climates, a 95%+ AFUE furnace usually earns back the price difference in lower gas bills. Where winters are mild, the payback can take a very long time.
Furnace Replacement Near Roswell
- Alpharetta $4,400 to $10,800
- Dunwoody $4,000 to $9,800
- Sandy Springs $3,900 to $9,600
- Johns Creek $4,400 to $10,800
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Atlanta Peachtree Airport; NOAA Storm Events Database 2020-2025, Fulton County. Prices are our estimates, not contractor quotes. Updated 2026.