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A contractor quoting central AC installation in Tom Green County has to account for what the climate asks of a system year after year, not just what the equipment is rated to do in ideal conditions. 350 severe weather events were recorded in Tom Green County, Texas between 2015 and 2024. At that rate, severe weather is part of normal operation here, not an exception a system might face once or twice. A unit undersized for this load or poorly sealed at the air handler will struggle before it has any real age on it. Sizing and installation quality are local engineering questions, and a contractor who treats them as catalog defaults will produce a system that underperforms from the start.
Ductwork in a house this old was sized and routed for equipment that has since been replaced at least once, possibly twice, and what a contractor finds behind the registers decides more about the job than the unit they bring. Half the homes in Tom Green County, Texas were built in 1980 or earlier (2020-2024 ACS 5-year). That gap between when the ducts went in and what a modern central AC system asks of them is where installation work either holds or does not: a new unit running through undersized or deteriorated ductwork will not perform to spec, and retrofitting the distribution adds scope before the equipment question is even settled. The electrical is the same story, since the service a house of that vintage was built with may not meet what current equipment draws.
What a Central AC System Puts in Your Home
The outdoor condenser unit sits on a concrete pad beside the house and holds the compressor and condenser coil, which are the mechanical core of the system. Inside, the air handler or furnace cabinet stands in a closet, basement, or utility space and holds the evaporator coil and blower that move conditioned air through the house.
The thermostat goes on an interior wall where it reads the air temperature and tells the system when to run. A copper refrigerant line set runs between the outdoor unit and the indoor cabinet, and a condensate drain line carries moisture pulled from the air out of the home.
The drawing shows the standard layout of these components, and a licensed contractor determines exactly how each one fits the configuration of your house.
Get matched in Tom Green CountyTom Green County, by the numbers
350 severe weather events were recorded in Tom Green 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 Tom Green County, Texas were built in 1980 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesTom Green County, Texas holds 52,318 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 65.1% of the occupied homes in Tom Green County, Texas (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRules & Standards Governing Central AC Installation in Tom Green County, Texas9 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.
What Tom Green County, Texas Requires for HVAC Installation
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 Tom Green County
Weather places real demands on cooling equipment, and those demands vary by where you live. What the climate does in Tom Green County shapes how hard a central AC system has to work and what it needs to be built to handle.
350 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.