The answer to 'how much to replace central air in my area' is that the cost to replace a central air conditioning system can vary widely depending on several factors. Generally, you can expect to pay anywhere from $4,000 to $12,000 or more for a full central AC replacement, including the outdoor condenser unit and indoor air handler.
The exact cost will depend on the size of your home, the efficiency rating of the new system, the complexity of the installation, and your local labor and material costs. Replacing an older, less efficient system with a newer, high-SEER model can also increase the upfront investment but will likely save you money on your energy bills in the long run.