Furnace Replacement Cost in Montgomery, Alabama
Expect to pay $2,600 to $6,300 for furnace replacement in Montgomery, AL. Most homeowners end up near $4,600, depending on the equipment tier and how much of the old setup can be reused.
Compare Free Quotes in Montgomery
Montgomery Weather and HVAC Load
Montgomery logs 1,755 heating degree days and 2,846 cooling degree days in a normal year, based on the closest NOAA weather station. Cooling carries most of the load. Heating equipment gets light use, so a furnace here often outlasts the AC it's paired with. A normal year brings 40 nights at or below freezing and 92 days over 90°F. 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 | 1,755 |
|---|---|
| Cooling degree days / year | 2,846 |
| Nights at or below 32°F | 40 |
| Days above 90°F | 92 |
| Average low / high | 57.1°F / 78.7°F |
Montgomery Housing Stock
Half the homes in Montgomery were built before 1977 (Census ACS median), so the typical house is about 49 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 54.3% of occupied homes, roughly 44,000 households. Homes here have a median value of $148,500 and households a median income of $55,687. Those two numbers drive the labor adjustment in our estimate.
NOAA storm reports for Montgomery County show 12 hail days and 21 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. Montgomery County also had 7 tornado days in that period.
When Replacement Makes Sense
- A tech found a cracked heat exchanger, or the CO detector has gone off
- The furnace is 15 to 20 years old or more
- Some rooms stay cold, the burner short-cycles, or the ignitor keeps failing
- A repair quote runs past a third of the cost of a new unit
What Moves the Price
- Single-stage, two-stage or modulating gas valve
- New PVC venting if you move to a condensing model
- AFUE rating: a basic 80% unit vs. a 96% condensing furnace
- BTU size, which should come from a Manual J load calculation
- Condition of the existing ductwork and any changes it needs
- Permit and inspection fees, which the local building department sets
We lowered the national figures about 19% for Montgomery 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
- The new furnace, filter rack and thermostat wiring
- The permit and the manufacturer warranty registration
- Combustion and safety tests
- Removing and hauling away the old furnace
- Gas line and vent connections
Alabama Permits, Efficiency Rules and Rebates
Alabama 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 Montgomery; the contractor normally pulls it. Before you sign, ask each bidder for their Alabama 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
- Ask for the Manual J load calculation in writing. Oversized furnaces are the most common mistake we see.
- 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.
Get Free Furnace Replacement Quotes in Montgomery
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.
Furnace Replacement Questions from Montgomery Homeowners
How much is furnace replacement in Montgomery?
Plan on $2,600 to $6,300, with most jobs near $4,600. 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 Montgomery?
Between late fall and early spring. With 92 days over 90°F, Montgomery 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 Montgomery
- Birmingham $2,600 to $6,400
- Tuscaloosa $2,700 to $6,700
- Mobile $2,500 to $6,100
- Huntsville $3,100 to $7,500
Sources: U.S. Census Bureau ACS 5-year estimates 2019-2023 and 2024 population estimates; NOAA NCEI U.S. Climate Normals 1991-2020, station Montgomery; NOAA Storm Events Database 2020-2025, Montgomery County. Prices are our estimates, not contractor quotes. Updated 2026.