Sizing comes first
Bigger is not better. An oversized system cools the air quickly, satisfies the thermostat, and shuts off before it has removed much moisture — which is exactly the wrong outcome in a humid climate. The house feels cold and clammy rather than comfortable.
A proper load calculation accounts for square footage, insulation, window area and orientation, infiltration, duct location and occupancy — not just a rule of thumb per square foot.
Ductwork deserves attention
Installing new equipment on undersized or leaky ducts limits what the new system can deliver. In homes with attic duct runs, leakage and insulation condition directly affect capacity and operating cost.
It is reasonable to ask whether the existing duct system was evaluated, and what static pressure the new equipment will see.
Equipment choices worth understanding
- Single-stage: simplest and least expensive, runs at full capacity whenever it runs.
- Two-stage: runs at reduced capacity most of the time, which improves humidity removal and comfort.
- Variable-capacity: longest run times at low output, generally the strongest humidity control, at a higher price.
- Heat pump versus straight cool with electric or gas heat — the local climate makes heat pumps a common choice.
- Matched indoor and outdoor components, which affects both performance and warranty.
What a good installation includes
- Correct line set handling, evacuation to an appropriate vacuum, and verified charge.
- Properly sized and sealed plenum and duct connections.
- A condensate system with correct slope, trap, secondary protection and a float switch.
- A level, properly supported pad or platform for the outdoor unit.
- Thermostat configured correctly for the equipment type.
- Airflow verified and documented, and system operation demonstrated to the homeowner.
Permits and verification
Residential HVAC replacement generally requires permitting in Leon County jurisdictions. Homeowners are responsible for confirming that any contractor they hire carries the required licenses, insurance and permits for the work being performed.
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Frequently Asked Questions
Through a load calculation performed for your specific home. Square-footage rules of thumb frequently produce oversized equipment, which hurts humidity control in this climate.

