HVAC System Replacement Cost in South Carolina

Full HVAC system replacement in South Carolina costs $8,900 to $19,300 in 2026, though city-to-city prices vary quite a bit. Both heating and cooling get heavy use in South Carolina: its larger communities average 2,495 heating and 2,043 cooling degree days a year.

HVAC System Replacement Prices in South Carolina Cities

City	Estimate	Heating / cooling degree days
Charleston	$10,600 to $23,000	1,623 / 2,447
Columbia	$8,200 to $17,700	2,572 / 2,075
North Charleston	$8,800 to $19,100	1,844 / 2,434
Mount Pleasant	$12,300 to $26,700	2,051 / 2,279
Rock Hill	$8,300 to $18,200	2,871 / 1,839

From 2020 through 2025, NOAA recorded 103 winter storm and ice events, 6 heat events, 28 extreme cold events and 649 hail reports in South Carolina. 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 South Carolina

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