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Sizing a central AC system here starts with what the compressor and condenser fan will actually be asked to carry. Homes in Kershaw County, SC run cooling about five months a year, from May through September. An undersized unit runs those components near their limit through peak heat, and the contactor that starts the compressor takes that wear every cycle. A contractor who gets the load calculation wrong leaves a homeowner with a system that degrades faster than it should, and the failure shows up in the compressor before anything else on the unit.
Ductwork laid decades before current equipment standards is what a contractor has to assess before any installation quote in this county holds. Half the homes in Kershaw County, South Carolina were built in 1993 or earlier (2020-2024 ACS 5-year). That stock was ducted for systems that are no longer made, and what those runs can carry for a new central AC unit is not a given. A contractor who skips the duct evaluation and prices only the equipment leaves the homeowner with a figure that may not survive the install. The electrical service in houses that age gets the same scrutiny, because panel capacity for a new unit has to be confirmed on site.
What Gets Installed With a New Central AC
The outdoor condenser unit sits on a pad outside the house and holds the compressor and condenser coil, the core hardware of the system. Inside, the air handler or furnace cabinet stands in a utility space, basement, or closet and houses the evaporator coil and blower that move conditioned air through the home.
A copper refrigerant line set runs between the two units, connecting the indoor and outdoor sides through the wall or floor. A thermostat mounts on an interior wall and gives the homeowner control over when the system runs.
The drawing shows a typical layout, and a licensed contractor determines what the installation calls for in your specific house.
Get matched in Kershaw CountyKershaw County, by the numbers
150 severe weather events were recorded in Kershaw County, South Carolina 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 Kershaw County, South Carolina were built in 1993 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesKershaw County, South Carolina holds 30,134 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 82.0% of the occupied homes in Kershaw County, South Carolina (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards for Central AC Installation in Kershaw County, South Carolina9 sourced rules and standards
What the installation looks like from your side
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 Kershaw County, South Carolina
South Carolina requires a mechanical contractor license for contracting work whose total cost of construction is greater than ten thousand dollars.
Severe Weather Events in Kershaw County
Kershaw County's climate puts real stress on cooling equipment over time. How much a system is pushed depends on local conditions, which is why weather history is part of sizing and installation decisions here.
150 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.