Installation & Replacement
AC replacement in Miami, sized, permitted and tied down
A replacement is the biggest cooling decision a Miami household makes. We size it from the house, not the old unit, pull the Miami-Dade permit, and anchor the condenser the way the code asks.
Miami service office on SW 117th Ave · We answer 24/7
- Answered 24/7
- Miami service office
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Updated October 2026
AC replacement in Miami typically runs $6,500 to $13,500 in published 2026 guides, depending on size, efficiency and ductwork. Our SW 117th Ave office sizes the new system from a load calculation, pulls the Miami-Dade mechanical permit with the equipment's AHRI numbers, and installs a system at or above the Southeast SEER2 minimum, anchored to its pad for the county's wind code.
The job
What a proper replacement includes in Miami
The old unit's size is a starting point, not an answer. Many Miami homes were fitted with oversized systems that cool fast and leave the air damp. A load calculation looks at the house itself, its windows, insulation and orientation, and often lands on a smaller or variable-speed system that dehumidifies better.
A replacement also has paperwork here. Miami-Dade requires a mechanical permit for every AC replacement, and the outdoor unit has to be anchored to its pad with approved hardware. We handle both, and we recover the old system's refrigerant rather than venting it.
Your options
Single-stage, two-stage or variable-speed
| Single-stage | Two-stage | Variable-speed | |
|---|---|---|---|
| How it runs | Full speed on or off | Low most of the time, high on hot days | Adjusts continuously |
| Humidity control | Basic | Better | Best |
| Up-front cost | Lowest | Middle | Highest |
In a humid Miami house, longer, slower cycles pull more moisture out of the air, which is often the reason to step up.
What moves the price
What decides the price of a new system
Planning range: Central AC replacement in Miami: $6,500-$13,500 in published 2026 guides. A market range, not our quote.
System size
Tonnage from the load calculation, not the old nameplate.
Efficiency
Higher SEER2 and variable speed cost more up front.
Ductwork
Leaking or undersized duct adds work.
Air handler location
Attic and closet installs differ in labor.
Permit and anchoring
Miami-Dade permit and wind-rated hardware.
Electrical
A new disconnect or breaker when needed.
Coastal protection
Coated coils for homes near the water.
What we see on this job
Full system replacement
Replacing both the condenser and the air handler together gives you a matched system with one warranty and the efficiency it was rated for. We check the ductwork, the drain, the electrical disconnect and the pad at the same time, because a new system on leaking attic duct or a cracked pad wastes part of what you paid for. Where the air handler is in good condition and compatible, we'll tell you, but a mismatched pair is rarely worth the savings.
Repair or replace decision
A common rule of thumb multiplies the repair price by the system's age; past a certain figure, replacement deserves a look. It is a starting point, not a verdict. We weigh the system's age against Miami's ten to fifteen year service life, the refrigerant it uses, how often it has needed repairs, and whether it still keeps the house dry. An R-22 system with a failed compressor is almost always a replacement; a nine-year-old R-410A system with a bad fan motor almost never is. The technician gives you the repair price and the replacement price together, and the decision is yours.
SEER2 upgrade
Since January 1, 2023, a new split AC under 45,000 BTU installed in Florida must be at least 14.3 SEER2. That is the floor, not the only option. Higher-efficiency and variable-speed systems cost more up front and run longer, quieter cycles that pull more moisture out of the air, which matters in a humid house as much as the energy savings. We show you what the step up costs and what it changes, rather than defaulting to the top of the range.
What is included
What our AC replacement includes
- Room-by-room load calculation
- Matched condenser and air handler
- Miami-Dade mechanical permit
- Wind-rated pad anchoring
- Refrigerant recovered from the old system
- New line set or flushed existing lines
- Drain, float switch and pan checked
- Thermostat set up for the new system
- County inspection scheduled
Local conditions
Permits and wind code on Miami-Dade replacements
Miami-Dade requires a mechanical permit for every AC replacement, reviews the equipment's AHRI certificate, and treats a field swap to a different model as a violation. The county also sits in the High-Velocity Hurricane Zone, so condensers are anchored to their concrete pads with hardware named in the permit, engineered for a 175 mph design wind, and every new unit must meet the Southeast SEER2 minimum.
Step by step
How a replacement runs from estimate to inspection
- 1
Load calculation
The house is measured, not the old unit.
- 2
Options priced
Two or three systems with clear differences.
- 3
Permit applied for
Equipment specs and AHRI numbers submitted.
- 4
Old system removed
Refrigerant recovered, not vented.
- 5
New system installed
Pad, anchoring, line set, drain and electrical.
- 6
Start-up and charge
Charge confirmed, airflow set, drain tested.
- 7
Inspection
County inspection scheduled and passed.
Timing
How long a replacement takes
Most Miami replacements are finished in one working day, from removing the old system to the start-up test. Attic air handlers, duct changes or a new electrical disconnect can push that into a second day. The county inspection is scheduled afterwards, and the system runs normally in the meantime.
Brands we service and install
FAQ
Questions Miami customers ask about AC replacement
Published 2026 Miami guides put central AC replacement at $6,500 to $13,500, depending on size, efficiency and ductwork.
Yes. Miami-Dade requires a mechanical permit for every replacement, and we pull it.
Most replacements are done in one day, with the county inspection scheduled after.
Not automatically. An oversized system short cycles and leaves the house humid. The load calculation decides.
At least 14.3 SEER2 for most new split systems in Florida; higher ratings are optional.
Yes. We recover its refrigerant and haul the old equipment away.
Same category
Related installation work we handle in Miami
AC Zoning System Installation
Motorized dampers, zoned thermostats.
AC Unit Relocation
Moving the outdoor unit, relocating for additions and pools.
New AC Installation
First-time central air, load calculation and sizing.
Get a replacement sized for the house, not the old unit
Call the Miami office to book an estimate with a load calculation and clearly priced options.
