HVAC System Replacement Cost in Mableton, Georgia
Our 2026 estimate for full HVAC system replacement in Mableton, GA is $8,800 to $19,200. That puts Mableton 4% above the national average.
Compare Free Quotes in Mableton
Mableton Weather and HVAC Load
Mableton logs 3,050 heating degree days and 1,309 cooling degree days in a normal year, based on the closest NOAA weather station. Heating is the bigger job here, and furnaces and heat pumps in Mableton put in far more hours than the air conditioner. On average, Mableton gets 64 freezing nights and 10 days above 90°F per 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.
| Heating degree days / year | 3,050 |
|---|---|
| Cooling degree days / year | 1,309 |
| Nights at or below 32°F | 64 |
| Days above 90°F | 10 |
| Average low / high | 50.1°F / 70.2°F |
Mableton Housing Stock
The median Mableton home dates to 1985, according to the Census ACS. That makes the typical house about 41 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 75.2% of occupied homes, roughly 12,000 households. Homes here have a median value of $306,200 and households a median income of $84,662. Those two numbers drive the labor adjustment in our estimate.
NOAA storm reports for Cobb County show 9 hail days and 27 days with damaging thunderstorm winds over the six years from 2020 to 2025. 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. Cobb County also had 3 tornado days in that period.
When Replacement Makes Sense
- Some rooms are uncomfortable, and the energy bills are high
- Both units keep needing repairs
- Both the heating and cooling equipment are 15 years old or more
What Moves the Price
- Permits and electrical work
- Duct repair or replacement
- Furnace plus AC, or heat pump plus air handler
- Equipment sized to the house and climate
- Efficiency ratings: SEER2, AFUE and HSPF2
- Thermostat and zoning upgrades
For Mableton we raised the national figures about 4%, based on local income, home values and climate-based equipment sizing. Get at least three written quotes; real bids can land outside this range.
What the Quote Should Cover
- New, matched heating and cooling equipment
- Duct connections and sealing
- Removing the old equipment
- Startup, testing and warranty registration
- A load calculation and system design
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 Mableton; 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
- Make every bidder quote the same efficiency ratings, or the prices won't compare.
- Get one quote for a heat pump system and one for a furnace plus AC.
- Ask for a duct leakage test. Leaky ducts can lose 20 to 30% of what the system puts out.
Get Free HVAC System Replacement Quotes in Mableton
Tell us where you are and up to three licensed local pros will get in touch. You don't have to hire any of them.
HVAC System Replacement Questions from Mableton Homeowners
How much is full HVAC system replacement in Mableton?
Plan on $8,800 to $19,200, with most jobs near $14,500. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule full HVAC system replacement in Mableton?
Between late spring and early fall. Mableton averages 64 freezing nights a year, and heating calls spike from November through February.
How often should an HVAC system be replaced?
Most systems get replaced every 15 to 20 years. AC units and heat pumps usually wear out before gas furnaces do.
Can I replace only the AC and keep my furnace?
Yes, as long as the indoor coil and blower work with the new AC. A mismatched system loses efficiency and can void the warranty.
HVAC System Replacement Near Mableton
- Smyrna $9,600 to $20,900
- Atlanta $9,500 to $20,700
- Johns Creek $12,000 to $26,100
- Alpharetta $12,000 to $26,100
- Warner Robins $8,200 to $17,900
- Albany $8,000 to $17,400
- Roswell $11,100 to $24,100
- Marietta $8,800 to $19,200
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Mableton; NOAA Storm Events Database 2020-2025, Cobb County. Prices are our estimates, not contractor quotes. Updated 2026.