Furnace Replacement Cost in Gulfport, Mississippi
Expect to pay $2,500 to $6,100 for furnace replacement in Gulfport, MS. Most homeowners end up near $4,500, depending on the equipment tier and how much of the old setup can be reused.
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Gulfport Weather and HVAC Load
In a normal year, Gulfport racks up 1,507 heating and 2,748 cooling degree days (NOAA 1991-2020 normals). Cooling carries most of the load. Heating equipment gets light use, so a furnace here often outlasts the AC it's paired with. On average, Gulfport gets 16 freezing nights and 69 days above 90°F per year. For a 2,000 sq ft house, this climate points to a heating load somewhere near 35,000 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 | 1,507 |
|---|---|
| Cooling degree days / year | 2,748 |
| Nights at or below 32°F | 16 |
| Days above 90°F | 69 |
| Average low / high | 59.4°F / 77.3°F |
Gulfport Housing Stock
The median Gulfport home dates to 1986, according to the Census ACS. That makes the typical house about 40 years old. Plenty of houses from this period still run original 1990s or early-2000s equipment, which is past its expected service life. About 15,000 households here own their home, 53.1% of the occupied total. Homes here have a median value of $167,100 and households a median income of $46,044. Those two numbers drive the labor adjustment in our estimate.
Harrison County had 10 hail days and 21 days with damaging thunderstorm winds from 2020 through 2025, according to NOAA storm records. The largest hail reported was 2 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. Harrison County also had 9 tornado days in that period.
When Replacement Makes Sense
- The furnace is 15 to 20 years old or more
- 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
- Gas or electric bills keep climbing even though usage hasn't changed
What Moves the Price
- BTU size, which should come from a Manual J load calculation
- New PVC venting if you move to a condensing model
- Condition of the existing ductwork and any changes it needs
- Permit and inspection fees, which the local building department sets
- AFUE rating: a basic 80% unit vs. a 96% condensing furnace
- Single-stage, two-stage or modulating gas valve
For Gulfport we lowered the national figures about 22%, 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
- The new furnace, filter rack and thermostat wiring
- Removing and hauling away the old furnace
- Gas line and vent connections
- The permit and the manufacturer warranty registration
- Combustion and safety tests
Mississippi Permits, Efficiency Rules and Rebates
Mississippi 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 Gulfport. If a bidder suggests skipping it, move on. Also ask for a Mississippi 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
- Look up utility rebates on 95%+ AFUE units before you buy.
- 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 Gulfport Homeowners
How much is furnace replacement in Gulfport?
Plan on $2,500 to $6,100, with most jobs near $4,500. Equipment efficiency, house size and the condition of the ducts and wiring decide where your quote falls.
When is the best time to schedule furnace replacement in Gulfport?
Between late fall and early spring. With 69 days over 90°F, Gulfport contractors are booked solid all summer, and off-season jobs are easier to schedule and negotiate.
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 Gulfport
- Biloxi $2,600 to $6,400
- Jackson $2,600 to $6,300
- Southaven $3,100 to $7,500
- Hattiesburg $2,500 to $6,200
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Gulfport Biloxi Airport; NOAA Storm Events Database 2020-2025, Harrison County. Prices are our estimates, not contractor quotes. Updated 2026.