AC Installation & Replacement in South Florida

When replacement beats repair

In South Florida an air conditioner runs close to year-round, so a system that is ten to twelve years old has often worked through far more seasons than the same unit would up north. Replacement usually makes more sense when the system is in that age range, when the repair bill is a large share of the cost of new equipment, when the compressor or coil is what failed, or when the unit uses an older refrigerant that is getting harder to service.

If the system is younger and the problem is a capacitor, a clogged drain or a failed fan motor, repair is normally the better call. Our guide to [repair versus replacement in Florida](/ac-repair-vs-replacement-florida/) walks through the decision in more detail.

SEER2 minimums and efficiency

Efficiency is rated in SEER2, the current seasonal efficiency metric. Florida sits in the federal Southeast region, where the 2023 minimums are 14.3 SEER2 for split-system air conditioners under 45,000 BTU per hour and 13.8 SEER2 for split systems at or above 45,000 BTU per hour. Those are floors, not recommendations. Because cooling runs most of the year here, a higher rating can pay back, but it also raises the equipment price, so ask the contractor to show the estimated running-cost difference and payback instead of a general promise of savings.

Compare the rating for the exact combination of outdoor unit, indoor coil and air handler, since a mismatched pairing will not deliver the published number. Also ask which refrigerant the system uses. The industry has been moving to lower-global-warming refrigerants such as R-454B and R-32, and a new outdoor unit generally needs a matching indoor coil rather than being paired with an old one.

Permits and the Florida Building Code

Replacing an air conditioner in Florida is permitted work. Under the Florida Building Code, Mechanical, a change-out requires a mechanical permit from your city or county building department, which the licensed contractor pulls and closes out with an inspection. A new disconnect or circuit may need its own electrical permit, and depending on the jurisdiction and the scope, a duct leakage test may also be required.

The permit protects you. It confirms the work was inspected, that the outdoor unit is anchored for wind loads (requirements are stricter in Miami-Dade and Broward, which sit in the High-Velocity Hurricane Zone) and that the condensate drain and safety devices are in place. Unpermitted work can complicate a home sale, an insurance claim or a warranty. Check the contractor's license on the state's DBPR license search, and ask who pulls the permit and whether the fees are in the quote.

Timing and financing

Same-day installs in peak season are rare. After you approve a quote, the contractor has to confirm equipment availability, pull the permit and schedule a crew. For a standard swap, one to three days from go-ahead to a working system is typical, and the installation itself is commonly done in a single day. Duct changes, electrical upgrades or an awkward air handler location can add time.

Many homeowners spread the cost of a new system over time. Ask whether financing is available, get the terms in writing and compare the total cost of the loan, not just the monthly payment. Rates depend on the lender, so we do not quote them here.

The mini-split option

Not every space needs a full ducted system. For a converted garage, an addition, a Florida room or a house with no ductwork, a ductless mini-split may fit better than extending ducts. Our page on [ductless mini-split installation](/mini-split-installation/) covers where they make sense, sizing per room, and what to expect on permits and electrical.