New AC Unit in Palm Beach: A Florida Homeowner's Complete Guide

Palm Beach County sits in South Florida's humid subtropical zone, and the climate here is genuinely demanding on HVAC equipment. Average summer temperatures hover in the low-to-mid 90s, but the real challenge is humidity. Relative humidity regularly exceeds 80% during summer months, and even on cooler winter days, indoor moisture control remains a year-round concern.

For your AC system, high humidity means the equipment has to work harder to dehumidify the air — not just cool it. An undersized or improperly configured system will cool the space down to your thermostat setpoint but leave the air feeling clammy and uncomfortable. Over time, excess indoor humidity also encourages mold growth inside ductwork and on evaporator coils.

Coastal proximity adds another layer of complexity. Salt air accelerates corrosion on outdoor condenser coils and electrical components. If your home is within a few miles of the Intracoastal Waterway or the Atlantic coastline, you'll want to discuss corrosion-resistant coil coatings with your installer — this is a real, practical consideration that affects equipment longevity in Palm Beach specifically.

When you start shopping for a new AC unit, you'll encounter the term SEER2 almost immediately. SEER2 stands for Seasonal Energy Efficiency Ratio 2 — it's the updated federal efficiency measurement standard that replaced the older SEER rating in January 2023. The higher the SEER2 number, the more efficiently the system moves heat out of your home per unit of electricity consumed.

As of 2023, the federal minimum SEER2 for new split-system central air conditioners installed in Florida and other Southeast states is 14.3 SEER2 (roughly equivalent to the old 15 SEER). Many Palm Beach homeowners choose systems in the 16 to 20 SEER2 range for meaningful energy savings, and two-stage or variable-speed compressor systems in that range also provide superior humidity control — a particularly important benefit given South Florida's moisture levels.

Florida Power & Light (FPL) serves most of Palm Beach County, and the utility has historically offered efficiency-based rebate programs for higher-SEER equipment. While specific rebate values vary and change periodically, choosing a higher-efficiency system is worth discussing during your intake process to understand current available incentives.

One of the most common and costly mistakes in AC replacement is installing an oversized system. Many homeowners assume a larger unit means faster, better cooling — but in Florida's humid climate, the opposite is often true. An oversized air conditioner cools the space so quickly that it short-cycles, meaning it shuts off before it has run long enough to properly dehumidify the air. The result is a home that feels cool but muggy, with higher humidity levels that can encourage mold and mildew.

Proper AC sizing requires a Manual J load calculation — a standardized engineering assessment that accounts for your home's square footage, ceiling height, insulation levels, window orientation and type, local climate data, and occupancy. In Palm Beach County, a rough rule of thumb is approximately 400 to 500 square feet per ton of cooling capacity, but that number shifts significantly based on your specific home's characteristics.

Before any credible installer can give you an accurate system recommendation, they need to know your home's square footage, age of construction, window count and direction, current insulation levels, and whether your ductwork is in conditioned or unconditioned space. If someone quotes you a system size without asking these questions, that's a red flag.

In Palm Beach County, AC replacement is a permitted activity — meaning a licensed contractor must pull a permit before the work begins, and the installation must pass inspection before the system is considered complete and legally commissioned. This is not bureaucratic red tape; it protects you. A permitted installation means the work was reviewed against Florida Building Code standards, and a licensed inspector verified the refrigerant charge, electrical connections, ductwork integrity, and equipment placement.

The Palm Beach County Building Division oversees most unincorporated areas, while municipalities like West Palm Beach, Boca Raton, Boynton Beach, and Delray Beach have their own building departments. The permit and inspection process typically adds a few days to a project timeline, but any contractor who suggests skipping the permit to save time or money is creating serious liability for you as the homeowner — and potentially voiding manufacturer warranties.

Expect the typical permitted AC replacement in Palm Beach County to follow this flow: contractor pulls permit, installation day occurs, contractor schedules inspection, county inspector visits, system receives final approval. Your contractor should handle all of this on your behalf.

A new, high-efficiency AC unit is only as effective as the duct system delivering conditioned air throughout your home. In Palm Beach County, many homes — particularly those built before 1990 — have ductwork that is undersized, poorly sealed, or deteriorating. Older flexible duct systems can develop leaks at joints and connections, meaning 20% to 30% of your cooled air may be escaping into unconditioned attic space before it ever reaches a living area.

Before or during your AC replacement, a thorough installer will assess your existing ductwork. Signs that your ducts need attention include rooms that never get comfortable despite the thermostat being correct, visible gaps or disconnections at duct connections, and unusually high energy bills relative to your home size. In Florida's hot attics, even small duct leaks compound quickly into large efficiency losses.

If your ductwork needs repair or replacement, that work will be factored into a comprehensive system recommendation. It's one of the key pieces of information a complete intake assessment will capture — along with your home's age, construction type, and current insulation — to make sure any quote you review is based on your actual home situation.

Getting an accurate, apples-to-apples AC quote in Palm Beach requires preparation. Before you sit down with any proposal, make sure the following information has been collected and documented: your home's conditioned square footage, the current system's age and tonnage (usually found on the outdoor unit data plate), the type and condition of your existing ductwork, your home's insulation level, and your typical monthly FPL bill during peak summer months.

You should also know whether your home is a slab-on-grade or has a crawl space, whether your air handler is in the attic or a closet, and whether your current refrigerant type is R-22 (now discontinued and expensive to service) or R-410A or the newer R-454B. These details directly affect what equipment is appropriate and what installation complexity is involved.

At NewHVACDeals, our intake process captures all of this information systematically before any quotes are generated or reviewed. That way, you're comparing real, complete proposals — not rough ballpark numbers that don't account for your home's specific needs. Starting a saved intake is the first step toward getting clarity on your actual replacement options.