HVAC System Replacement Cost in Alabama

Across Alabama, homeowners pay $8,500 to $18,600 for full HVAC system replacement. Climate, labor rates and housing age all move the price. In Alabama's cities, the median home dates to about 1983.

HVAC System Replacement Prices in Alabama Cities

City	Estimate	Heating / cooling degree days
Huntsville	$8,700 to $19,000	2,831 / 2,106
Mobile	$8,300 to $18,100	1,403 / 2,931
Birmingham	$7,600 to $16,600	2,533 / 2,177
Montgomery	$8,300 to $18,000	1,755 / 2,846
Tuscaloosa	$8,000 to $17,400	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

Both the heating and cooling equipment are 15 years old or more
Both units keep needing repairs
Some rooms are uncomfortable, and the energy bills are high
An old R-22 AC paired with an aging furnace

What Moves the Price

Furnace plus AC, or heat pump plus air handler
Efficiency ratings: SEER2, AFUE and HSPF2
Equipment sized to the house and climate
Duct repair or replacement
Thermostat and zoning upgrades
Permits and electrical work

Common Questions

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.

Other HVAC Prices in Alabama

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