Central air installation with existing ductwork is priced case-by-case and finalized after an on-site evaluation. The biggest cost driver is the system size and efficiency needed to match your home’s cooling load.
If your ducts are in good condition and properly sized, installation is usually more straightforward; if airflow is restricted or leaky, minor duct repairs or adjustments can affect the total. Our technicians measure static pressure to confirm your ducts can support a modern, efficient system, which helps avoid oversizing and extra noise. We also offer 60 month financing with approved credit after we design the right setup for your space. Our team frequently installs central air in North Shore homes, including those in and around Deerfield.
Common factors that shape price:
- Tonnage and SEER2 rating of the new unit
- Duct condition and any needed modifications
- Electrical, pad, and line-set requirements
- Thermostat and accessory choices (e.g., dehumidifier)
Schedule an in-home assessment to receive a clear, written quote with options.
Updated: 2026-08-02
Need help in Deerfield, IL? Call (773) 320-5395 or book online. “Oasis was a lifesaver for us! I called on a Monday night, and our new AC was installed by Tuesday afternoon.” — Tara G.