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Sizing central AC for a home in Upshur County starts with what the local climate actually demands, and that picture matters before any equipment gets specified. 100 severe weather events were recorded in Upshur County, Texas between 2015 and 2024. At that rate, severe weather is a real but not dominant variable in how hard a system runs, which means a contractor here cannot lean on the weather record alone to justify a heavier or more expensive installation. What drives the right size and the right equipment grade is the structure of the home, how well the existing ductwork is sealed, and how the previous system was set up. The weather is part of the load calculation. It is not the whole story.
Ductwork laid down for an older system carries assumptions about airflow and load that a new central AC unit does not share. Half the homes in Upshur County, Texas were built in 1989 or earlier (2020-2024 ACS 5-year). A contractor installing a new system in a house of this vintage has to assess whether the existing runs, returns, and trunk lines can move the air a modern unit pushes, before the new equipment is ever priced. If they cannot, re-routing or resizing becomes part of the job. The electrical service is a secondary check, but the duct layout is where the installation question actually sits.
What a Central AC System Consists Of
The outdoor condenser unit sits on a concrete pad beside the house and holds the compressor and condenser coil. Inside, the air handler or furnace-mounted evaporator coil lives in a closet, attic, or utility room and is the indoor half of the system. Together these two units are the core of what a contractor brings to the job.
The refrigerant line set runs between the outdoor and indoor units, connecting the two through a small penetration in the wall or floor. A dedicated thermostat mounts on an interior wall and gives the homeowner control over when the system runs and what temperature it holds.
The drawing shows a representative layout, and a licensed contractor determines exactly how each piece fits the conditions of your house.
Get matched in Upshur CountyUpshur County, by the numbers
100 severe weather events were recorded in Upshur County, Texas 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 Upshur County, Texas were built in 1989 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesUpshur County, Texas holds 17,519 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 80.7% of the occupied homes in Upshur County, Texas (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRules and Standards Behind Central AC Installation in Upshur County, Texas9 sourced rules and standards
What happens once a contractor is on the job
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 Upshur County, Texas
In Texas a person may not engage in air conditioning and refrigeration contracting unless that person holds a license issued under the state air conditioning and refrigeration contractor law.
Severe Weather Events in Upshur County
Extreme weather puts hours on HVAC equipment that calm years never would. How hard a system has to work, and how long it lasts, is shaped by what the local climate actually does.
100 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.