How much does a new AC unit cost?
New AC unit cost in 2026 runs roughly $5,000–$12,000 installed for a central system, according to industry cost data from sources like HomeGuide and Angi, depending on the system's size, efficiency rating, and whether you replace the air handler and ductwork along with the outdoor unit. In Florida, where the AC runs hard most of the year, the most important factor isn't the brand on the box — it's correct sizing, because an improperly sized system leaves Florida air clammy and runs up your bill no matter how good the equipment is.
Key takeaways
- A new central AC system runs about $5,000–$12,000 installed, more for high-efficiency or full-system jobs.
- Correct sizing matters more than brand for comfort and humidity control in Florida.
- A higher-efficiency system pays back faster here because the cooling season is long.
- Replacement usually requires a permit pulled by the licensed HVAC contractor.
- Get three written quotes that specify equipment, size, efficiency, and warranty.
Table of contents
- What a new AC system costs
- Why sizing beats brand in Florida
- Does higher efficiency pay off?
- Repair or replace?
- Permits and how to compare quotes
- Where to start
- FAQ
What a new AC system costs
AC replacement pricing depends on what's included — just the outdoor condenser, or a full system with air handler and ductwork. Here's the 2026 picture from HomeGuide's AC replacement cost data:
| Scope | Typical installed cost | Notes |
|---|---|---|
| Condenser only | ~$3,500–$6,000 | When the air handler is still good |
| Full system (AC + air handler) | ~$5,000–$10,000 | The common replacement |
| High-efficiency / larger system | ~$8,000–$12,000+ | Higher SEER2, bigger tonnage |
| With new ductwork | add ~$1,500–$5,000 | If ducts are leaky or undersized |
A worked example: replacing a failed full system in a 1,800 sq ft Kissimmee home with a standard-efficiency unit typically lands in the mid-five figures of dollars — call it the $6,000–$9,000 range — while stepping up to high efficiency or adding ductwork pushes it higher. Make sure each quote states exactly what's included, because "a new AC" can mean very different scopes.
Why sizing beats brand in Florida
Here's the thing most homeowners get wrong: bigger is not better. AC capacity is measured in tons, and the right size comes from a proper load calculation (a "Manual J") that accounts for your home's square footage, insulation, windows, and orientation — not a rule of thumb. In Florida, sizing matters more than almost anywhere because of humidity.
An oversized unit cools the air to temperature fast, then shuts off before it has run long enough to pull moisture out — leaving your home cold but clammy, that damp feeling that also invites mold. An undersized unit can't keep up during an August afternoon. A correctly sized system runs longer, gentler cycles that both cool and dehumidify. If a contractor quotes a size without measuring or asking about your home, that's a reason to get another quote. Good sizing also pairs with good attic insulation, which reduces the load the system has to handle.
Does higher efficiency pay off?
Efficiency is rated in SEER2 (the current standard), and higher means less energy per unit of cooling. The question is whether the higher upfront cost of a high-efficiency system pays back — and in Florida it pays back faster than in most of the country, simply because the cooling season is so long and intense. A system that runs many hours a day, most of the year, accumulates energy savings quickly.
The break-even depends on how long you'll stay in the home and the price gap between efficiency tiers. If you're staying long-term, the more efficient system often wins on total cost; if you're planning to move soon, a solid mid-efficiency unit may make more sense. The federal ENERGY STAR program is a neutral reference for comparing efficiency. Either way, an efficient unit that's oversized still won't dehumidify well — sizing comes first.
Repair or replace?
Not every AC problem means replacement. A newer system — say, under 10 years old — with an affordable fix like a capacitor or contactor is usually worth repairing, and a contractor who says so rather than pushing a new system is worth keeping. The math shifts toward replacement when the unit is over about 12–15 years old, when it's failing repeatedly, or when it needs a major repair like a compressor or a coil that costs a large share of a new system.
Get the diagnosis in writing, and be cautious of a quick jump to "you need a whole new system" without explanation — the same caution that applies when an AC runs but won't cool. If replacement is genuinely warranted, treat it as a real purchase: three quotes, not one.
Permits and how to compare quotes
A central AC replacement typically requires a permit and inspection in Florida, pulled by the licensed HVAC contractor under their own license — the inspection confirms the install meets code. The familiar red flag applies: if a contractor asks you to pull the permit, be cautious.
When you compare quotes, look past the bottom-line number to what's actually included:
| Check | Why it matters |
|---|---|
| Load calculation / sizing | Proper sizing drives comfort and humidity control |
| Equipment make, model, tonnage, SEER2 | So you're comparing like for like |
| Air handler and ductwork | A leaky duct system wastes a good unit |
| Permit and inspection | Confirms code-compliant install |
| Labor warranty + manufacturer warranty | In writing, both parts |
Three written quotes from licensed HVAC companies will show you the real spread — and reveal who's sizing correctly versus who's guessing.
Where to start
Start by noting your current system's age and size and whether the air handler needs replacing too. Our HVAC directory and Orlando city page list licensed local companies, with more across the full directory; for nearby Osceola County homeowners, our HVAC companies in Kissimmee guide covers the same vetting. Insist on a proper load calculation, get three itemized quotes, confirm the permit, and remember: in Florida, the right size matters more than the logo on the unit.
FAQ
How much does a new AC unit cost in 2026? Industry cost data puts a new central AC system around $5,000–$12,000 installed, depending on size, efficiency, and whether the air handler and ductwork are replaced too. Higher-efficiency and larger systems land at the upper end.
What size AC do I need for my Florida home? That depends on a proper load calculation, not just square footage. In Florida, correct sizing matters for humidity control — an oversized unit short-cycles and leaves the air clammy, while an undersized one can't keep up in August.
Does a higher SEER rating pay off in Florida? Often, yes. Because the cooling season here is long and intense, a more efficient system runs many hours, so the energy savings accumulate. Weigh the higher upfront cost against how long you'll stay in the home.
Should I repair or replace my AC? Repair a newer unit with an affordable fix; replace one that's over about 12–15 years old, failing repeatedly, or facing a major repair. Get the diagnosis in writing and three quotes for a full replacement.
Do I need a permit to replace an AC in Florida? Usually yes. A central system replacement typically requires a permit and inspection, pulled by the licensed HVAC contractor. Being asked to pull your own permit is a red flag.