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Things to Consider When Buying a New AC Unit in Florida (2026 Guide)
Last reviewed: May 2026
Buying a new AC is one of the larger home purchases most Brevard County homeowners will make. Systems typically run $7,000 to $15,000 installed, and the decisions you make upfront determine how well it performs for the next 15 to 20 years.
When buying a new AC unit in Florida, five factors matter most:
- Right-sizing using an ACCA Manual J load calculation, not a square-foot rule of thumb
- SEER2 efficiency rating that fits your home, usage, and budget. In Florida's climate, dehumidification performance matters as much as cooling capacity
- R-454B refrigerant: required on all new residential systems since January 1, 2025
- Warranty terms: what's covered, for how long, and whether labor is included
- A qualified installer with an active Florida HVAC license and NATE certification
Do I Really Need a New AC?
Not every struggling system needs to be replaced. The question is whether repair still makes financial sense, and in Florida, that answer comes faster than in cooler climates.
The humidity here runs 75 to 80 percent through most of the summer, and most Space Coast homes run their AC 10 to 11 months a year. That's roughly double the wear of a northern system, which means Florida units often reach the end of their useful life closer to 12 to 15 years than the 15 to 20 years a manufacturer might estimate.
The $5,000 Rule
One of the simplest ways to determine whether repair or replacement is the better option is the $5,000 rule: multiply the age of your AC unit by the estimated repair cost. If the total exceeds $5,000, replacing your air conditioner is likely the smarter choice.
Here's how that plays out:
- A 10-year-old unit with a $300 repair cost equals $3,000: repair may be worth considering.
- A 10-year-old unit with a $600 repair cost equals $6,000: replacement is likely more cost-effective.
It's not exhaustive, but it's a reliable starting point when assessing your system.
Signs Your System Is Beyond Repair
If you're still unsure, watch for these warning signs:
- Frequent breakdowns: Constant repairs add up quickly and leave you without reliable cooling during peak season. Two or more repairs in the same season is a pattern, not bad luck.
- Rising energy bills: Older systems lose efficiency over time, driving up cooling costs even when running at full capacity.
- Outdated refrigerant: Units running on R-22 (Freon) are expensive to maintain due to its phase-out under federal regulations. Systems on R-410A face a similar trajectory — the EPA is phasing it down under the AIM Act, supply is tightening, and repair costs are rising.
- Age of the unit: Most systems last 15 to 20 years. If yours is approaching that range and struggling to perform, replacement is likely the better investment.
If any of these apply, repair is a bridge, not a solution.
What to Look for in a Replacement AC
1. Right-sizing with a Manual J calculation. Skip the square-foot rule of thumb — Florida homes need an ACCA Manual J load calculation that accounts for ceiling height, insulation, window area, and humidity load. An oversized unit leaves the home clammy; an undersized one runs continuously and can't keep up in August.
2. SEER2 efficiency rating. The legal minimum in Florida's DOE Southeast region is 14.3 SEER2. Most owner-occupied homes land in the 16–17 SEER2 sweet spot; high-efficiency systems at 18+ qualify for ENERGY STAR Most Efficient certification, a reliable way to identify the best AC units for Florida's year-round run hours.
| Tier | SEER2 Range | Best For | Florida Verdict |
|---|---|---|---|
| Builder grade | 14.3 (legal min) | Tight budget, rentals | Acceptable, but high run-time costs |
| Mid-efficiency | 16-17 SEER2 | Owner-occupied, 1,500-2,500 sq ft | Sweet spot for most Brevard homes |
| High-efficiency | 18-20 SEER2 | Long-term owners | Strong ROI given Florida run hours |
| Premium variable-speed | 20+ SEER2 | Dehumidification priority, larger homes | Best comfort; longer payback period |
3. Refrigerant: R-454B. All new residential ACs sold since January 1, 2025 use R-454B under the EPA's AIM Act. R-410A is still legal to service on existing systems, but supply is tightening; a real factor in any repair-versus-replace decision.
4. Warranty coverage. Look for a 10-year parts warranty and register within 60 to 90 days of installation or coverage often drops to five years. Confirm whether the compressor and labor are included or require a separate agreement.
Buying a New AC the Right Way
Knowing how to buy a new air conditioner comes down to sequence. The process isn't complicated, but doing steps out of order leads to mismatched equipment, surprise costs, and systems that underperform from day one:
- Get a Manual J load calculation before any equipment is specified. This determines correct tonnage and tells the installer what the system needs to do.
- Compare quotes on equivalent systems. Make sure contractors are quoting the same SEER2 tier, brand level, and warranty. A 16 SEER2 quote and an 18 SEER2 quote aren't comparable on price alone.
- Confirm the installation scope. A new outdoor unit often pairs with a new air handler, and ductwork conditions affect performance. Leaking or undersized ducts limit what even a top-tier system can deliver.
- Ask about financing. Ellington offers financing options that make it easier to choose the right system. Ask during your free in-home estimate.
Florida-Specific Considerations
Space Coast homeowners face a few conditions worth accounting for at the time of purchase.
Homes on or near the barrier islands, like Satellite Beach, Cocoa Beach, and Cape Canaveral, face salt air that accelerates corrosion on condenser coils and electrical connections. Ask your installer about corrosion-resistant coil coatings; the difference in longevity over a 15-year system life is meaningful. Properties near the Indian River Lagoon and Sebastian Inlet face similar exposure even without direct Atlantic frontage.
Florida Building Code requires hurricane tie-down anchoring for outdoor units. A code-compliant installation will include this — confirm it's part of your quote, not an add-on.
Attic air handlers deserve attention in any Florida installation. Attic temperatures in Brevard County routinely exceed 130 degrees in summer, which drives heat gain through the supply plenum and stresses the air handler. Homes in Viera, Melbourne, and similar newer construction often have attic-mounted systems — proper air handler insulation and plenum sealing are part of a quality install, not an upgrade.
This is also the right moment to consider indoor air quality upgrades. A whole-home dehumidifier, UV air purifier, or upgraded filtration is easiest to add during installation, before the system is running and the access panels are closed.
How Ellington Can Help
Ellington AC & Electric serves homeowners across the Space Coast from four locations: Rockledge, Sebastian, Edgewater, and Satellite Beach. Our NATE-certified technicians perform ACCA Manual J load calculations on every AC installation. We don't size by square footage.
We're a licensed HVAC contractor (license #CAC1813503) and back every installation with a 100% satisfaction guarantee.
Start with a free in-home estimate. We'll assess your current system, run a proper load calculation, and give you honest options. If an AC repair is the right answer, we'll tell you that too.
Schedule online or call (321) 222-0605. We're available 24/7 across Brevard, Volusia, and Indian River counties.
Schedule Online
Frequently Asked Questions
How long does a new AC installation take?
Most standard central AC replacements take four to six hours for an experienced crew. Installations involving new ductwork, attic air handler replacement, or electrical upgrades will take longer. Your installer should be able to give you a realistic time estimate after the in-home assessment.
Should I replace my AC and furnace at the same time?
In Florida, "furnace" typically refers to an air handler with electric heat strips rather than a gas furnace, but the principle is the same. A new outdoor unit paired with an old air handler won't operate at rated efficiency, and some manufacturers won't honor warranty claims on mismatched equipment. If your air handler is close in age to the outdoor unit, replacing both at once avoids a second round of labor costs and ensures the system performs as rated.
Is a heat pump worth it in Florida?
For most Space Coast homeowners, yes. Florida's mild winters mean a heat pump handles heating efficiently for most of the season, and you're rarely in cold snap territory where a furnace would outperform it. If your home already has electric heat strips or a heat pump, replacing with another heat pump is almost always the right call. Gas furnaces are uncommon in Brevard County for good reason.
Will my R-410A system become illegal after 2026?
No. The EPA's AIM Act ended the manufacture of new R-410A equipment as of January 1, 2025, but existing systems can be serviced indefinitely with reclaimed refrigerant. What will change is cost: as R-410A production winds down globally, servicing aging systems will become more expensive. That's a repair-versus-replace consideration, not a compliance issue.
What size AC do I need for a Florida home?
There's no reliable shortcut: proper sizing requires an ACCA Manual J load calculation specific to your home. Many Florida homes in the 1,500- to 2,500-square-foot range land in the 3- to 4-ton range, but insulation, ceiling height, window area, and orientation all shift that number.
An oversized system in Florida's humid climate cools quickly without dehumidifying, leaving the air feeling damp regardless of the thermostat setting — a common complaint that gets misdiagnosed as a refrigerant problem. Our guide on why AC units leak water covers how oversizing and humidity problems are often connected.
