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A contractor quoting a central AC installation in Greenbrier County starts with a load calculation, not a catalog. 160 severe weather events were recorded in Greenbrier County, West Virginia between 2015 and 2024. At that rate, severe weather is a standing condition for any system installed here, which means undersizing is not a minor miscalculation. A unit that was already working at its limit on a mild summer day will be overwhelmed when the weather turns, and it will age accordingly. Contractors who know this area build that load into every sizing decision before they pull a single line set.
Ductwork laid down for an older heating system carries assumptions about airflow that a central AC unit may not share, and in Greenbrier County's housing stock those assumptions are baked into the walls and floors of a large share of homes. Half the homes in Greenbrier County, West Virginia were built in 1977 or earlier (2020-2024 ACS 5-year). That means a contractor quoting a central AC install here is evaluating the existing duct layout as closely as the equipment itself, checking whether the runs, the returns, and the register placement will move conditioned air the way the new system expects. Electrical service gets the same scrutiny. What the house already contains is what decides the scope, and the unit goes in after that picture is clear.
What Gets Installed With a New Central AC
The outdoor condenser unit sits outside the house, usually on a concrete pad along a side or rear wall, and it holds the compressor and the condenser coil. Inside, the air handler mounts in a utility closet, attic, or basement and contains the evaporator coil and the blower that pulls air through the system.
A copper refrigerant line set runs between those two units, connecting the outdoor and indoor sides of the system. The thermostat goes on an interior wall in the living space and gives the homeowner control over when the system runs.
The drawing shows the general layout of a central AC system, and a licensed contractor determines exactly what goes where in your house.
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160 severe weather events were recorded in Greenbrier County, West Virginia 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 Greenbrier County, West Virginia were built in 1977 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesGreenbrier County, West Virginia holds 17,913 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 73.1% of the occupied homes in Greenbrier County, West Virginia (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCode, Licensing, and Efficiency Rules for Central AC Work in Greenbrier County, West Virginia9 sourced rules and standards
What Installation Day Looks Like in Greenbrier County
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 Contractors in Greenbrier County, West Virginia
West Virginia requires a licence from the Commissioner of Labor to perform, or offer to perform, work on a heating, ventilating and cooling system.
Severe Weather Events in Greenbrier County
Weather conditions place real demands on cooling equipment, and those demands vary by where you live. A central AC system sized and installed for Greenbrier County's climate is working against local conditions, not a generic load estimate.
160 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.