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A contractor quoting a central AC installation in Clarke County has to size the system for what this area actually runs against, and that is a different calculation than it would be somewhere weather sits quietly in the background. 190 severe weather events were recorded in Clarke County, Alabama between 2015 and 2024. At that rate, severe weather is part of the normal operating environment every new system enters, which means duct layout, equipment capacity, and the quality of every connection point carry real consequences. A unit installed to minimum spec here is working against conditions the spec did not price in.
Ductwork laid down for a previous generation of equipment is what a contractor has to evaluate first in much of Clarke County's housing stock. Half the homes in Clarke County, Alabama were built in 1981 or earlier (2020-2024 ACS 5-year). Trunks, plenums, and branch runs from that era were sized around systems with different airflow requirements, and a new central AC unit has to work with what those walls and ceilings already contain. If the existing ductwork cannot move the volume the new system pushes, the installation answer is not just a new condenser and air handler. The electrical service feeding the unit gets the same look.
What Gets Installed With a New Central AC
The outdoor condenser unit sits outside the house, usually on a concrete pad beside or behind the home, and it holds the compressor and condenser coil. Inside, the air handler or furnace cabinet mounts in a utility closet, basement, or attic and houses the evaporator coil and blower that moves air through the home.
A refrigerant line set runs between the two units, connecting the indoor and outdoor sides through the wall or floor. The thermostat mounts on an interior wall and gives the homeowner control over when and how the system runs.
The drawing shows a typical layout, and a licensed contractor determines what fits the specific configuration of your house.
Get matched in Clarke CountyClarke County, by the numbers
190 severe weather events were recorded in Clarke County, Alabama between 2015 and 2024.
NOAA National Centers for Environmental Information, Storm Events Database, bulk CSV export, events 2015-01-01 through 2024-12-31.Half the homes in Clarke County, Alabama were built in 1981 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesClarke County, Alabama holds 11,749 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 70.8% of the occupied homes in Clarke County, Alabama (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Governing Central AC Installation in Clarke County, Alabama9 sourced rules and standards
What the Installation Actually Looks Like
Split-system central air conditioners rated below 45,000 Btu/h manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Split-system central air conditioners rated at or above 45,000 Btu/h manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Split-system central air conditioners manufactured between January 1, 2015 and December 31, 2022 had to meet 13 SEER, the metric that preceded SEER2.
Single-package central air conditioners manufactured on or after January 1, 2023 must meet a federal minimum of 13.4 SEER2.
Space-constrained central air conditioners manufactured on or after January 1, 2023 must meet a federal minimum of 11.7 SEER2.
Federal efficiency standards for split-system central air conditioners and heat pumps are set on each certified combination of outdoor unit and indoor coil rather than on the outdoor unit alone.
Residential and light commercial air conditioning and heat pump systems assembled in the field, including mini-splits and unitary systems, may not be installed on or after January 1, 2025 using a refrigerant with a global warming potential above 700.
A field-assembled system whose specified components were all manufactured or imported before January 1, 2025 carries no installation compliance date under the refrigerant restrictions and may still be installed.
Licensing Rules for HVAC Work in Clarke County, Alabama
Alabama requires state certification to do heating, air conditioning and refrigeration contracting: nobody may advertise, bid, pull permits or do the work unless the person in responsible charge is a certified contractor.
Severe Weather Events in Clarke County
Weather patterns in this part of Alabama put real demands on cooling equipment over time. The stress a local climate places on a central AC system is part of what shapes how it should be sized, installed, and maintained.
190 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.