Furnace Replacement Cost in Alabama

Across Alabama, homeowners pay $2,900 to $7,100 for furnace replacement. Climate, labor rates and housing age all move the price. In Alabama's cities, the median home dates to about 1983.

Furnace Replacement Prices in Alabama Cities

City	Estimate	Heating / cooling degree days
Huntsville	$3,100 to $7,500	2,831 / 2,106
Mobile	$2,500 to $6,100	1,403 / 2,931
Birmingham	$2,600 to $6,400	2,533 / 2,177
Montgomery	$2,600 to $6,300	1,755 / 2,846
Tuscaloosa	$2,700 to $6,700	2,422 / 2,211

From 2020 through 2025, NOAA recorded 127 winter storm and ice events, 547 heat events, 114 extreme cold events and 806 hail reports in Alabama. Those are the days when emergency HVAC calls pile up.

When Replacement Makes Sense

The furnace is 15 to 20 years old or more
A repair quote runs past a third of the cost of a new unit
Gas or electric bills keep climbing even though usage hasn't changed
Some rooms stay cold, the burner short-cycles, or the ignitor keeps failing
A tech found a cracked heat exchanger, or the CO detector has gone off

What Moves the Price

AFUE rating: a basic 80% unit vs. a 96% condensing furnace
BTU size, which should come from a Manual J load calculation
Single-stage, two-stage or modulating gas valve
New PVC venting if you move to a condensing model
Permit and inspection fees, which the local building department sets
Condition of the existing ductwork and any changes it needs

Common Questions

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.

Other HVAC Prices in Alabama

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