New Air Conditioner Installation
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Short answer
Air conditioning installation means sizing the system to the house, not just swapping the box. A contractor should perform a load calculation, confirm the ductwork can carry the airflow, and check the electrical supply and condensate drainage before quoting. In Florida, replacement of a central system is normally a permitted job with an inspection, and the equipment must meet current federal efficiency requirements. Ask for the load calculation and the permit in writing before work starts.
New AC installation involves sizing the system to the home's actual cooling load, selecting SEER2-rated equipment, and verifying the ductwork can support it — not just swapping in a same-size replacement.
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Why sizing matters
An oversized system cools the air quickly but cycles off before it adequately removes humidity, leaving a home feeling clammy despite a cool thermostat reading — a particular concern in South Florida. An undersized system runs constantly and struggles to keep up on the hottest days. A load calculation accounts for square footage, insulation, window exposure, and duct condition rather than assuming the old unit's size was correct.
SEER2 and efficiency ratings
New residential AC equipment sold and installed since 2023 is rated under the SEER2 testing standard, which reflects real-world duct static pressure more closely than the older SEER rating. Higher SEER2 ratings generally mean lower operating cost but higher upfront equipment cost — a technician can walk through the tradeoff for your usage.
Ductwork evaluation
Ducts that leak, are undersized, or were designed for a different-capacity system can undermine even a well-chosen new unit. An installer should evaluate duct condition and airflow, not just set the new equipment on the old pad and connect it.
Heat pump vs. straight-cool system
Most South Florida installations use a heat pump, which provides both cooling and heating by reversing the refrigeration cycle, rather than a straight-cool AC that requires separate electric-strip heat. A heat pump is typically the more efficient choice locally given the mild winters.
Permits and installation standards
Full system installations typically require a permit through the local building department, and the installer should be licensed for HVAC work in Florida. Ask whether the quote includes permitting.
What to expect on installation day
- Removal of the old condenser and/or air handler
- Line set, electrical, and condensate drain connections for the new equipment
- Startup, refrigerant charge verification, and airflow testing
- Thermostat setup and a walkthrough of new features
Should I repair or replace my air conditioner?
Repair is usually the right call when the system is within its expected service life and one component failed — a capacitor, contactor, blower motor or control board. Replacement becomes the better value when the compressor fails, when the system is near the end of its life, when repairs are becoming frequent, or when the unit uses a refrigerant that is being phased down and is costly to recharge.
| Factor | Points to repair | Points to replacement |
|---|---|---|
| System age | Well within service life | Near or past rated life |
| Failed part | Capacitor, contactor, motor, board | Compressor or coil |
| Repair history | First failure | Several service calls in recent seasons |
| Refrigerant | Current, readily available | Phased-down and expensive to recharge |
Repair when
- The failure is a single serviceable component
- The system otherwise cools normally
- The unit is relatively new
Replace when
- The compressor or coil has failed
- Cooling performance has fallen off across seasons
- Repair costs are becoming routine
Heat pump vs central air conditioning: which fits a Florida home?
A central air conditioner cools only and pairs with a separate heat source. A heat pump uses the same refrigeration cycle in both directions, so it cools in summer and provides heating in cooler months without a furnace. In a mild climate with limited heating demand, a heat pump commonly covers both needs with one system. The right choice also depends on existing ductwork, electrical capacity and the current heat source.
| Central AC | Heat pump | |
|---|---|---|
| Cooling | Yes | Yes |
| Heating | Requires a separate furnace or strip heat | Built in |
| Equipment count | Two systems to maintain | One system |
| Best fit | Homes with an existing working furnace | Mild-winter homes replacing both functions |
Central AC when
- You have a working furnace you intend to keep
- Only the cooling side has failed
Heat pump when
- Both heating and cooling equipment are due
- You want one system for a mild climate
- You are moving away from a fuel-burning heat source
Refrigerant leak repair vs system replacement: what should I expect?
Low refrigerant is a symptom, not a service item — a sealed system does not consume refrigerant, so a low charge means there is a leak. Repair is reasonable when the leak is accessible, such as a line-set or fitting, on a system otherwise in good condition. Replacement is generally the better value when the leak is inside the evaporator or condenser coil on an older unit, or when the refrigerant is being phased down.
| Leak location | Typical direction |
|---|---|
| Accessible line or fitting | Repair and recharge |
| Evaporator coil on a newer system | Coil replacement |
| Coil failure on an aging system | Evaluate full replacement |
| Multiple leaks found | Replacement |
Repair when
- The leak is found and accessible
- The system is relatively new
- Refrigerant is readily available
Replace when
- The coil is leaking on an older unit
- The system has been recharged repeatedly
- Recharge cost is escalating
Safety note: Repeated recharging without finding the leak wastes money and releases refrigerant; ask for a leak search rather than a top-up.
How much does AC replacement cost?
Air conditioning replacement is quoted per property, because the equipment is only part of the job. Cost depends on system capacity, efficiency rating, equipment type, and the installation work required — ductwork condition, electrical capacity, line-set replacement, permitting and disposal of the old unit. Two identical homes can carry different prices based purely on what the install requires.
What drives the price
- System capacity and efficiency rating
- Equipment type: straight cool, heat pump, or ductless
- Ductwork condition and whether it must be repaired or replaced
- Electrical service capacity, permits and disposal
Access and property conditions
- Attic, rooftop or crawl-space equipment locations
- Crane or hoist requirements
- HOA or building approval and permitting
Emergency versus scheduled service
Replacement is planned work. An emergency replacement done during a failure in peak season is typically the most expensive path, and gives you the least time to compare quotes.
Repair or replace
If the current system is still cooling, get replacement quotes before it fails. Planned replacement lets you compare equipment and installers instead of buying under pressure.
Why an exact number needs a diagnosis
A load calculation and a look at the existing ductwork and electrical are what make a replacement quote meaningful. A number given without a site visit is not a quote.
UrgentHomePro does not set provider pricing and is not a contractor. Prices are quoted by the independent licensed professional who takes the job, after they see the problem.
Frequently asked questions
Do I need the same size unit as my old one?
Not necessarily. A load calculation based on your home's current condition — not just matching the old unit's tonnage — determines the correct size for efficient cooling and humidity control.
What's the difference between SEER and SEER2?
SEER2 is the current efficiency testing standard, effective 2023, that better reflects real-world duct resistance than the older SEER metric. New equipment is rated under SEER2.
Should I install a heat pump or a straight-cool AC?
Most South Florida homes benefit from a heat pump since it provides efficient heating for mild winters as well as cooling, versus a straight-cool system that relies on electric-strip heat.
Is a permit required for AC installation?
Full system replacements typically require a permit from the local building department. Ask your installer whether permitting is included in their quote.
Sources
- Central air conditioning operation, maintenance and replacement guidance — U.S. Department of Energy
- Heat illness prevention and warning signs during extreme heat — CDC
- Verify a Florida contractor or plumbing license — Florida DBPR Licensing Portal
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