How much does central air installation cost with existing ductwork?

Central air installation with existing ductwork is priced after an on-site evaluation because total cost depends on the equipment and the work your home actually needs. The biggest driver is matching the system size to your home’s cooling load; efficiency level and any setup adjustments come next. Our team installs and replaces central AC systems for homes across the Champaign area. We use flat-rate pricing so you know the number before work begins, and we finalize it after we measure, design, and commission the system for peak performance.

What typically affects price:

• System tonnage and SEER2 efficiency
• Electrical or pad upgrades and refrigerant line routing
• Thermostat, zoning, or indoor air quality add-ons
• Duct condition; sealing or adding a return can change the bid more than the condenser choice

Schedule a load calculation and written quote to confirm your exact price before you commit.

Updated: 2026-07-14

Need help in Champaign, IL? Call 217-247-4108 or book online. “The installation crew was spectacular… I am 100% satisfied with Lanz.” — Mark M.