How much does it cost to install central air with ductwork?

The cost to install central air with ductwork is confirmed after an in-home evaluation of your house and duct system. The biggest price differences usually come from duct design and condition, the system’s size and efficiency, and any needed electrical or installation complexities. A well-sealed return often improves comfort more than adding half a ton of capacity. We install systems across the Roanoke Valley and nearby communities using manufacturer-approved methods, upfront pricing, and full Lennox warranty support.

Your quote typically reflects:

• New ducts vs. reusing or modifying existing runs, including number of supplies and returns
• Home size, layout, insulation, and sun exposure that set the cooling load
• Equipment type and efficiency rating, plus thermostat and control options
• Line-set routing, condensate handling, and any electrical panel or wiring updates

Free estimates are available for new system installations. Schedule an in-home assessment to receive an itemized, written quote. <br/> Updated: 2026-04-13 <br/> Need help in Troutville, VA? Call 5406851594 or book online.