Furnace Replacement Cost in Dunwoody, Georgia

Dunwoody Weather and HVAC Load

Dunwoody logs 2,980 heating degree days and 1,728 cooling degree days in a normal year, based on the closest NOAA weather station. Neither season dominates in Dunwoody. That balance is a big reason heat pumps and dual-fuel systems sell well in Georgia. Count on roughly 49 nights below 32°F and 53 afternoons past 90°F in a typical year. Snowfall averages about 1 inches. 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.

Dunwoody Housing Stock

Census figures put the median build year in Dunwoody at 1984, so a typical house here has about 42 years on it. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. About 12,000 households here own their home, 54.4% of the occupied total. With a median household income of $109,116 and a median home value of $579,400, local labor rates come out above the national middle in our model.

DeKalb County had 1 hail day and 28 days with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. The largest hail reported was 1.75 inches across. Storms here are more likely to cause power surges than coil damage, so a surge protector on the outdoor unit is worth the small cost. DeKalb County also had 3 tornado days in that period.

When Replacement Makes Sense

• The furnace is 15 to 20 years old or more
• A repair quote runs past a third of the cost of a new unit
• Some rooms stay cold, the burner short-cycles, or the ignitor keeps failing
• Gas or electric bills keep climbing even though usage hasn't changed

What Moves the Price

• Condition of the existing ductwork and any changes it needs
• Permit and inspection fees, which the local building department sets
• Single-stage, two-stage or modulating gas valve
• New PVC venting if you move to a condensing model
• BTU size, which should come from a Manual J load calculation
• AFUE rating: a basic 80% unit vs. a 96% condensing furnace

We raised the national figures about 25% for Dunwoody 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
• Gas line and vent connections
• The permit and the manufacturer warranty registration
• Combustion and safety tests
• 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). Equipment replacements in Dunwoody generally need a mechanical permit, and a reputable contractor will pull it for you. Ask for their Georgia license or registration number and a certificate of insurance with the quote. 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

• Make sure all three quotes are for the same AFUE and staging, or you can't compare them.
• Look up utility rebates on 95%+ AFUE units before you buy.
• Ask for the Manual J load calculation in writing. Oversized furnaces are the most common mistake we see.

Furnace Replacement Questions from Dunwoody Homeowners

More HVAC Prices in Dunwoody

• Furnace Repair in Dunwoody
• AC Installation in Dunwoody
• AC Repair in Dunwoody
• Heat Pump Installation in Dunwoody
• Heat Pump Repair in Dunwoody
• HVAC System Replacement in Dunwoody
• Ductless Mini-Split Installation in Dunwoody
• Emergency HVAC Repair in Dunwoody
• HVAC Tune-Up & Maintenance in Dunwoody
• Boiler Replacement in Dunwoody
• Air Duct Cleaning in Dunwoody

Furnace Replacement Near Dunwoody

• Sandy Springs $3,900 to $9,600
• Brookhaven $4,200 to $10,300
• Roswell $4,100 to $9,900
• Valdosta $2,500 to $6,100
• Smyrna $3,600 to $8,800
• Stonecrest $2,900 to $7,200
• Marietta $3,300 to $8,100
• Albany $2,500 to $6,100