HVAC System 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

• Both units keep needing repairs
• An old R-22 AC paired with an aging furnace
• Some rooms are uncomfortable, and the energy bills are high

What Moves the Price

• Permits and electrical work
• Thermostat and zoning upgrades
• Equipment sized to the house and climate
• Duct repair or replacement
• Efficiency ratings: SEER2, AFUE and HSPF2
• Furnace plus AC, or heat pump plus air handler

We raised the national figures about 28% 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

• A load calculation and system design
• New, matched heating and cooling equipment
• Startup, testing and warranty registration
• Duct connections and sealing
• Removing the old equipment

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

• Ask for a duct leakage test. Leaky ducts can lose 20 to 30% of what the system puts out.
• Get one quote for a heat pump system and one for a furnace plus AC.
• Replacing both pieces at once usually costs less than two separate jobs a few years apart.

HVAC System Replacement Questions from Dunwoody Homeowners

More HVAC Prices in Dunwoody

• Furnace Replacement in Dunwoody
• Furnace Repair in Dunwoody
• AC Installation in Dunwoody
• AC Repair in Dunwoody
• Heat Pump Installation in Dunwoody
• Heat Pump Repair 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

HVAC System Replacement Near Dunwoody

• Sandy Springs $10,700 to $23,300
• Brookhaven $11,500 to $25,000
• Roswell $11,100 to $24,100
• Valdosta $7,800 to $17,000
• Smyrna $9,600 to $20,900
• Stonecrest $8,100 to $17,600
• Marietta $8,800 to $19,200
• Albany $8,000 to $17,400