Central air installation with existing ductwork is priced after an in-home evaluation; the final cost depends on the equipment you choose, its efficiency, and any code or electrical needs. Most price differences come from the size of the system and its SEER efficiency rating. We install systems across the Charleston area, including many James Island homes, and we handle permits and code compliance. Most residential installs finish in one day, and we provide transparent pricing with no hidden fees.
Key factors that set your total:
- System capacity (tonnage) and efficiency rating; high-efficiency options up to SEER 25 are available
- Condition of existing ductwork and any needed repairs or modifications
- Required electrical work, refrigerant line set, pad, and removal of old equipment
- Thermostat upgrades, indoor air quality add-ons, and manufacturer warranty options
Schedule a free in-home consultation to get a firm, written estimate tailored to your home.
Updated: 2026-08-05
Need help in James Island, SC? Call (843) 212-7515 or book online. "James provided excellent service. He led the crew that replaced our entire HVAC system in one day." — Dustin D.