Furnace Replacement Cost in Columbia, South Carolina
Our 2026 estimate for furnace replacement in Columbia, SC is $2,800 to $6,900. That puts Columbia 11% below the national average, mainly because of lower local labor costs.
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Columbia Weather and HVAC Load
Columbia logs 2,572 heating degree days and 2,075 cooling degree days in a normal year, based on the closest NOAA weather station. Neither season dominates in Columbia. That balance is a big reason heat pumps and dual-fuel systems sell well in South Carolina. A normal year brings 47 nights at or below freezing and 73 days over 90°F. For a 2,000 sq ft house, this climate points to a heating load somewhere near 40,000 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 | 2,572 |
|---|---|
| Cooling degree days / year | 2,075 |
| Nights at or below 32°F | 47 |
| Days above 90°F | 73 |
| Average low / high | 52°F / 75.1°F |
Columbia Housing Stock
The median Columbia home dates to 1978, according to the Census ACS. That makes the typical house about 48 years old. A lot of these homes are on their second or third system by now. The ductwork is usually original, and leaky joints are common. Owners live in 47.3% of occupied homes, roughly 24,000 households. The median home value is $243,500, and median household income is $55,653. We use both figures to adjust labor and pricing for this page.
Richland County had 12 hail days and 64 days with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. The largest hail reported was 1 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. Richland County also had 4 tornado days in that period.
When Replacement Makes Sense
- Gas or electric bills keep climbing even though usage hasn't changed
- A tech found a cracked heat exchanger, or the CO detector has gone off
- Some rooms stay cold, the burner short-cycles, or the ignitor keeps failing
- The furnace is 15 to 20 years old or more
What Moves the Price
- Permit and inspection fees, which the local building department sets
- Condition of the existing ductwork and any changes it needs
- BTU size, which should come from a Manual J load calculation
- AFUE rating: a basic 80% unit vs. a 96% condensing furnace
- Single-stage, two-stage or modulating gas valve
- New PVC venting if you move to a condensing model
For Columbia we lowered the national figures about 11%, 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
- Removing and hauling away the old furnace
- The permit and the manufacturer warranty registration
- Combustion and safety tests
- The new furnace, filter rack and thermostat wiring
- Gas line and vent connections
South Carolina Permits, Efficiency Rules and Rebates
South Carolina 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). Expect the contractor to pull a mechanical permit for a replacement job in Columbia. If a bidder suggests skipping it, move on. Also ask for a South Carolina 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 sure all three quotes are for the same AFUE and staging, or you can't compare them.
- Ask for the Manual J load calculation in writing. Oversized furnaces are the most common mistake we see.
- Look up utility rebates on 95%+ AFUE units before you buy.
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Furnace Replacement Questions from Columbia Homeowners
How much is furnace replacement in Columbia?
Plan on $2,800 to $6,900, with most jobs near $5,100. 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 Columbia?
In spring or fall. Those are the slow months between heating and cooling season in Columbia.
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.
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.
Furnace Replacement Near Columbia
- Charleston $3,400 to $8,200
- North Charleston $2,800 to $6,900
- Mount Pleasant $4,100 to $9,900
- Rock Hill $3,000 to $7,400
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Sandhill Research Elgin; NOAA Storm Events Database 2020-2025, Richland County. Prices are our estimates, not contractor quotes. Updated 2026.