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A contractor quoting a central AC installation in Robertson County sizes the system for the house, not around a weather record that demands it. 47 severe weather events were recorded in Robertson County, Texas between 2015 and 2024. At roughly the low end of what counties across the country accumulate, that puts severe weather in the range of an occasional disruption rather than a grinding seasonal condition. What a properly sized and correctly installed system here is fighting, year to year, is heat load and runtime, not repeated storm punishment. A contractor who skips a careful Manual J calculation because the climate seems forgiving is making a real mistake, since an undersized unit in sustained summer heat degrades on a predictable schedule regardless of how few severe events the county logs.
Ductwork laid in for equipment of an earlier generation carries assumptions about airflow and routing that a modern central AC system does not share. Half the homes in Robertson County, Texas were built in 1985 or earlier (2020-2024 ACS 5-year). A contractor sizing a new unit here has to assess what the existing duct network will actually deliver before any equipment gets ordered, because ducts that worked for the original system can restrict or unbalance a newer one. The electrical service gets the same look: what the house was wired for and what a current unit draws are questions answered by the panel, not by the model on the quote sheet.
What a Central AC System Includes
The indoor air handler sits inside the house, usually in a closet, attic, or utility room, and pulls warm air across a coil to cool it before sending it back through the vents. The outdoor condenser unit sits on a pad beside the house and holds the compressor and the coil that releases heat to the outside air.
A refrigerant line set runs between the two units, carrying the refrigerant that makes the exchange possible. The thermostat mounts on an interior wall and serves as the control point, reading the temperature and telling the system when to run.
The drawing shows a typical layout, and a licensed contractor determines exactly how each piece fits the specifics of your home.
Get matched in Robertson CountyRobertson County, by the numbers
47 severe weather events were recorded in Robertson 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 Robertson County, Texas were built in 1985 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRobertson County, Texas holds 8,612 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 72.4% of the occupied homes in Robertson 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 Robertson 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 Robertson 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 Robertson County
Weather puts a load on HVAC equipment, and that load is shaped by what actually happens in a given place. Sizing and installing central AC for Robertson County means accounting for local conditions, not a national average.
47 severe weather events, 2016–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.