How much does central air installation cost with existing ductwork?

Central air installation with existing ductwork is quoted after an on-site evaluation, and final pricing is confirmed once system size, electrical needs, and duct condition are verified. Most costs come from selecting a correctly sized outdoor unit and coil and confirming your existing ducts can deliver the airflow the system needs. With usable ductwork, the job is often straightforward; if we find leaks, crushed runs, or undersized returns, added duct fixes increase scope. A seasoned tech will also plan the equipment location, refrigerant line route, drain, and thermostat so the system performs from day one. We frequently install central air for homes around Brighton with upfront estimates and available financing options.

Key factors that change the price:

• Equipment capacity and efficiency rating (tonnage and SEER2)
• Electrical upgrades at the disconnect or panel
• Refrigerant line set replacement and outdoor pad/whip
• Thermostat upgrade and condensate handling

Schedule an in-home assessment to receive a firm, written quote for your home.

Updated: 2026-08-10

Need help in Brighton, CO? Call (720) 994-7055 or book online. "The three-man team installed a new furnace, air conditioner and a hot water heater... Everything looks so professionally done." — Timothy L.