How much does it cost to install a central air conditioner?

The cost to install a central air conditioner is set after an on-site evaluation because price depends on your home and the system you choose. The biggest driver is system size (tonnage) and efficiency rating (SEER2), followed by whether any duct or electrical work is needed. A technician will perform load calculations to right-size the unit and scope the job. For homes around Marion, we see costs shift most when older ducts are restrictive or when space limits require a different indoor unit style. We offer free estimates and free second opinions.

Key factors that change the price:

• System capacity and SEER2 efficiency
• Duct condition, modifications, or replacement
• Installation access and attic or closet constraints
• Thermostat, drain, pad, and electrical upgrades

Book a no-cost in-home estimate to get a firm quote after load calculations and a duct evaluation. <br/> Updated: 2026-03-31 <br/> Need help in Marion, TX? Call (210) 489-1389 or book online.