AC Replacement · Northeast Florida
We size the new system with a Manual J load calculation, explain the efficiency and refrigerant rules that apply, and give you a written quote with model numbers before any work starts.
At a glance
Why this matters in Florida
An oversized AC cools the air fast and shuts off before it removes much moisture. The thermostat is satisfied but the house feels clammy, and the short cycling wears parts out sooner.
A Manual J load calculation, from the Air Conditioning Contractors of America (ACCA), works out how much heat your home actually gains based on insulation, windows, orientation and duct location. That number sets the size, not the old unit’s label or a square-foot rule.
In many homes the ducts run through a hot attic, so we test static pressure too. A new system on leaky or undersized ducts won’t deliver its rated performance. See ductwork repair.
The rules
Florida is in the Department of Energy’s Southeast region. Since January 1, 2023, a new split-system air conditioner installed here must be at least 14.3 SEER2 below 45,000 Btu/h, and 13.8 SEER2 at 45,000 Btu/h and above.
Split heat pumps must meet 14.3 SEER2 and 7.5 HSPF2 nationwide. Higher ratings cost more up front and use less power, and we walk through that trade-off for your house.
New residential systems now use lower-GWP refrigerants such as R-454B or R-32 in place of R-410A. These are classified A2L, or mildly flammable, so equipment and installation follow updated safety standards.
Under a 2026 EPA rule, R-410A equipment made or imported before 2025 can still be installed while supply lasts, and existing R-410A systems can still be serviced. The two refrigerants can’t be mixed or converted in one system.
Repair or replace
Not every old system needs replacing. These are the factors we put in front of you:
Financing is available through Synchrony, GreenSky or Wisetack, or you can use your own credit union home-improvement loan. See financing. Military members, first responders and seniors get 10% off residential work through our discounts.
How it works
We check the ducts and static pressure and run a Manual J load calculation. If the old system has broken down, the $129 diagnostic comes first, waived if you choose a recommended repair over $250.
Your quote lists the outdoor unit, indoor coil or air handler and thermostat by model number with the SEER2 rating, so you can look them up and compare.
After the install we check the charge with superheat or subcooling, plus airflow and static pressure, then walk you through the new system.
Related work
Straight answers
Florida is in the DOE Southeast region, so a new split-system air conditioner must be at least 14.3 SEER2 below 45,000 Btu/h and 13.8 SEER2 at 45,000 Btu/h and above. Split heat pumps must meet 14.3 SEER2 and 7.5 HSPF2.
R-410A equipment made or imported before 2025 can still be installed while supply lasts, and existing R-410A systems can still be serviced. Most new equipment uses A2L refrigerants such as R-454B or R-32, and the two can’t be mixed in one system.
The old unit may have been sized wrong, and the house may have changed with new windows, insulation or rooms. A Manual J load calculation sizes the new system to the house as it is now.
Usually, yes. Indoor and outdoor sections are rated as a matched pair, and an R-410A indoor coil can’t be paired with an outdoor unit that uses an A2L refrigerant.
Yes. Financing is available through Synchrony, GreenSky or Wisetack, or you can use your own credit union home-improvement loan.
Langston’s Heating & Air Conditioning · Licensed CMC1251311 · Mon–Sat 8 AM–8 PM
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