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Sizing a central AC system for Botetourt County starts with what the climate actually asks of the equipment year to year. 123 severe weather events were recorded in Botetourt County, Virginia between 2015 and 2024. At that rate, severe weather is a standing feature of the operating environment here, not an occasional outlier, and a contractor who ignores it when sizing or placing equipment leaves the install working against conditions it was never built to handle. Duct layout, equipment capacity, and component placement are all local decisions in a county with a record like this.
Ductwork and electrical service laid out for older heating systems were sized and routed for equipment that made different demands than a modern central AC unit makes. Half the homes in Botetourt County, Virginia were built in 1984 or earlier (2020-2024 ACS 5-year). A house in that range was built before central air conditioning was a standard design assumption, which means the duct runs, their diameters, and the load the panel was wired to carry all reflect choices made around something else. A contractor installing a new system has to measure what is there, not assume it is adequate. Undersized runs restrict airflow; a panel that cannot carry the new unit's draw needs upgrading before the equipment goes in.
What Gets Installed With a New Central AC
The outdoor condenser unit sits outside the house, usually on a concrete pad along an exterior wall, and holds the compressor and condenser coil. Inside, the air handler mounts in a utility closet, attic, or basement and contains the evaporator coil and the blower that moves air through the house.
A refrigerant line set runs between the two units, connecting the outdoor and indoor sides of the system through the wall or floor. The thermostat goes on an interior wall where it reads the temperature of the living space and signals the system to run.
The drawing shows a typical layout, and a licensed contractor determines what fits your specific house and its existing setup.
Get matched in Botetourt CountyBotetourt County, by the numbers
123 severe weather events were recorded in Botetourt County, 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 Botetourt County, Virginia were built in 1984 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesBotetourt County, Virginia holds 15,069 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 85.5% of the occupied homes in Botetourt County, Virginia (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRules & Standards Behind Central AC Installation in Botetourt County, Virginia10 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 Botetourt County, Virginia
Virginia’s contractor licence classes start above $1,000: the entry class covers a single contract or project over $1,000 but less than $30,000, or less than $250,000 of work in any 12-month period, with larger classes above that.
Virginia requires a contractor licence: no person may engage in, or offer to engage in, contracting work in the Commonwealth without one.
Severe Weather Events in Botetourt County
Weather in this part of Virginia puts real demands on cooling equipment, pushing systems through conditions that affect how hard they run and how long they last. A central AC installation sized and built for local conditions holds up differently than one that is not, which is why the climate record here is part of the story.
123 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.