HVAC Replacement Cost in South Carolina (2026)

HVAC replacement in South Carolina typically runs $7,500–$17,000 for a complete 3-ton system replacement, with natural-gas furnaces with central AC as the dominant heating choice and roughly 2,400 heating degree days against 2,400 cooling degree days driving the seasonal load mix. South Carolina Lowcountry (Charleston, Beaufort, Hilton Head) carries heavy salt-air exposure that requires sea-coast units with epoxy-coated coils and stainless-steel cabinet hardware on every coastal install, while Upstate humid subtropical loads (Greenville, Spartanburg) demand variable-speed inverter HPs to manage the 8-month cooling season's high latent fraction.

State South Carolina
Cities Covered 13
Typical complete 3-ton system replacement $7,500 – $17,000
BLS HVAC mechanic wage $24.51/hr

South Carolina climate & load drivers

  • IECC climate zone: 3A-4A
  • Annual load split: Cooling-dominant — annual cooling load exceeds heating load (2,400 HDD / 2,400 CDD)
  • Dominant heating fuel: Natural gas — piped utility supply through state pipeline network
  • Dominant cooling system: Air-source heat pump providing both heating and cooling

South Carolina licensing & permits

  • License status: Statewide license required
  • License board: South Carolina LLR — Residential Specialty (HVAC) license over $5,000; Mechanical Contractor for commercial (official site)
  • Permit: city or county mechanical permit required

How HVAC replacement costs vary in South Carolina

State-specific code or insurance rule: South Carolina LLR sets a $5,000 residential threshold under SC Code §40-11-410 below which a Residential Specialty (HVAC) license is needed — one of the lowest residential HVAC dollar thresholds in the Southeast — and over $5,000 in commercial work requires the full Mechanical Contractor license and exam.

Cities in South Carolina

Compare HVAC replacement pricing for 13 cities across South Carolina.

Got a quote? Check if it's fair.

Upload your estimate for an instant price and scope review tuned to South Carolina labor and material rates.

Analyze your quote

More state guides