AC & HVAC · Miami-Dade · Broward · Palm Beach
AC Installation & Replacement in Miami — Sized Right, Permitted, Done
Your AC dying in August in Miami is not a surprise. It's a scheduling problem — one we can usually solve the same week. SEER2-rated systems, permits on every job, duct inspection included.
South Florida Reality
An AC System in Miami Works Twice as Hard as One in Atlanta
South Florida averages 2,800–3,000 cooling hours per year — roughly double the national average. A system rated for 15-year lifespan under moderate use often hits 10–12 years here. The combination of continuous operation, high ambient temperatures, salt air near the coast, and humidity levels that rarely drop below 60% creates conditions that accelerate component wear across every part of the system.
The humidity question is what most homeowners miss. An AC system doesn't just cool — it dehumidifies. An oversized unit cools your home quickly but shuts off before it can pull adequate moisture from the air. You end up with a home that's 73°F and 65% relative humidity, which feels clammy, encourages mold growth, and doesn't perform the way the system was designed to.
Correct sizing, verified at install, is the single most important factor in system performance and longevity in this climate. We run a load calculation on every installation.
2,800–3,000 Cooling Hours/Year
Double the national average. South Florida AC systems work harder, longer, and fail earlier than the manufacturer lifespan suggests.
Humidity Is Half the Battle
An oversized system cools fast but dehumidifies poorly. The result: cool but clammy. Mold-prone. Uncomfortable.
Salt Air Accelerates Corrosion
Coastal properties within 5 miles of the ocean should look at systems with corrosion-resistant coatings on the coil and cabinet.
Duct Leakage Is Common
20–30% of conditioned air typically leaks from older duct systems into the attic. A new unit on a leaking duct system underperforms from day one.
System Options
Which Type of System Is Right for Your Home
Most South Florida homes run central split systems. But not every home is the same — here's how the options compare.
Central Split System
Best for: Most single-family homes
Separate indoor air handler and outdoor condenser. Most common system in South Florida residential.
Mini-Split (Ductless)
Best for: Additions, garages, rooms without duct access
No ductwork required. Individual zone control. More efficient for targeted cooling.
Package Unit
Best for: Homes with all-in-one exterior installation
All components in one outdoor cabinet. Common in older South Florida homes with crawl spaces.
Heat Pump System
Best for: Homes wanting heating and cooling in one unit
More efficient than traditional systems in South Florida's mild winters. Qualifies for federal energy credits.
Florida Code — Effective January 2023
Florida Requires Minimum 15 SEER2 for New Installations
SEER2 is the updated efficiency standard that replaced SEER in 2023. The 15 SEER2 minimum in Florida is higher than the national standard because South Florida's year-round cooling season makes efficiency significantly more impactful on operating costs here than in northern states.
Heat pump systems and higher-efficiency units may qualify for the federal Energy Efficient Home Improvement Credit (25C) — up to 30% of equipment cost. Confirm eligibility with your tax professional. We provide the documentation you need to file.
Our Process
From Load Calculation to Final Startup
Six steps. We handle the permit, the inspection, and the diagnostic startup — so you know the system is operating correctly before we leave.
Load Calculation
We calculate the correct system size for your home — square footage, ceiling height, insulation, window exposure, and duct condition. Oversized AC units short-cycle and fail to dehumidify. Undersized ones run constantly. Sizing matters more than brand.
System Selection
We recommend systems based on load calculation results, your budget, and South Florida's specific demands — humidity control, salt-air corrosion resistance, and SEER2 efficiency ratings. You choose. We explain the trade-offs.
Permit Application
Florida requires a permit for AC installation and replacement. We pull it. Miami-Dade: 3–6 weeks for approval. Broward and Palm Beach: 1–3 weeks. No unpermitted installs — they void manufacturer warranties and create insurance problems.
Duct Inspection
Before any new equipment goes in, we inspect the existing duct system. Leaking ducts waste 20–30% of conditioned air into the attic. A new unit on a deteriorated duct system never performs as designed. We report what we find — you decide what to fix.
Installation
Old system disconnected and removed. New system set, charged, and commissioned. Electrical connections confirmed. Most replacements complete in one day. New installs with duct work: 2–3 days.
Inspection & Startup Testing
County inspector signs off on the installation. We then run startup diagnostics — system pressures, airflow, thermostat calibration, and refrigerant charge. You see the results before we leave.
AC not keeping up? We can help.
Same-day response, Monday through Saturday. We cover Miami-Dade, Broward, and Palm Beach County.
(786) 983-7928Common Questions
Frequently Asked Questions
How much does AC replacement cost in Miami?
It depends on the system size, equipment brand, whether ductwork needs repair, and the complexity of the installation. A straightforward like-for-like replacement is very different from a new installation with duct work. We provide a free, written estimate after assessing your home. Call (786) 983-7928 to schedule.
What is the $5,000 rule for AC in Florida?
The $5,000 rule is a contractor shorthand: multiply the age of your system by the repair cost. If the result exceeds $5,000, replacement is typically the better financial decision. A 10-year-old system with a $600 repair: replace ($6,000 > $5,000). A 3-year-old system with a $600 repair: fix ($1,800 < $5,000). It's a rough heuristic, not a law. We'll give you our honest assessment of repair vs. replace for your specific situation.
What is the 3-minute rule for AC?
Don't restart your AC within 3 minutes of turning it off. The compressor needs time to equalize refrigerant pressure. Restarting too quickly puts the compressor under excessive load and accelerates wear. If you've lost power and it comes back, wait 3–5 minutes before turning the system on — or set your thermostat to delay startup automatically.
What SEER rating do I need in Florida?
As of January 2023, Florida requires a minimum of 15 SEER2 for new central AC installations (the updated SEER2 standard replaced SEER ratings). South Florida's climate means your AC runs significantly more hours per year than in cooler states — higher efficiency ratings translate to more meaningful savings here than they would in, say, Montana. We'll discuss what rating makes sense for your usage and budget.
Why does AC sizing matter so much in South Florida?
An oversized system cools quickly but shuts off before it can adequately dehumidify the air. In South Florida — where humidity sits at 70–90% on most days — a home that feels cool but damp is still uncomfortable and will grow mold faster. Undersized systems run constantly and wear out faster. Correct sizing comes from a Manual J load calculation, not from matching the tonnage of the unit you're replacing. We run the calculation on every installation.
Do you service ductwork?
Yes. We inspect and repair duct systems as part of every AC replacement. Leaking duct connections, poorly insulated ductwork in the attic, and collapsed flex duct sections are all common in South Florida homes — and all reduce the efficiency of any new equipment you install. We report what we find and repair what needs fixing.
Does replacing AC require a permit in Miami-Dade?
Yes. Florida law requires a permit for AC installation and replacement. All equipment must be installed by a licensed contractor and inspected by the county. A contractor who offers to skip the permit is operating illegally and exposing you to warranty voiding, insurance complications, and code violations that surface at resale. We pull permits on every job.
What's the best AC brand for South Florida?
Trane, Carrier, Lennox, and Daikin all manufacture units rated for coastal and high-humidity applications. The brand matters less than the specific model's efficiency rating, your contractor's installation quality, and whether the duct system is in good shape to support it. We work with several major brands and will recommend based on your specific situation — not on margin.
Get a Free AC Estimate
We run a proper load calculation, inspect your duct system, and give you a written estimate with equipment options — not a number pulled from the same unit everyone else is installing.
If your system has a few good years left and a repair makes more financial sense than replacement, we'll tell you that. We're not going to recommend a $10,000 system to avoid a $300 repair.
Call (786) 983-7928