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A contractor quoting central AC installation in Dallam County has to size for what the climate actually demands, and the county's weather record makes that demand concrete. 157 severe weather events were recorded in Dallam County, Texas between 2015 and 2024. At that rate, severe weather is a standing feature of operating conditions here, not an occasional disruption, and a unit sized for gentler conditions will run harder than it was designed to. A contractor who accounts for that load at the point of installation selects equipment and specifies ductwork against real operating conditions, which changes what gets quoted and why.
Existing ductwork in this county's older homes gets sized for an installation job before the equipment does. Half the homes in Dallam County, Texas were built in 1977 or earlier (2020-2024 ACS 5-year). That age of construction means the ducts running through a typical house here were designed around systems that bore little resemblance to modern central AC units, and a contractor has to assess whether that existing network will move air correctly for whatever is going in now. Electrical service gets the same look, since the load a new unit draws may exceed what the panel was originally wired to handle. The equipment selection follows those findings.
What Goes Into a Central AC Installation
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 utility closet, attic, or basement. These are the two main pieces a contractor brings in and sets in place.
A refrigerant line set runs between the two units, connecting the indoor coil to the outdoor one through the wall or floor. The thermostat goes on an interior wall where it reads the home's air temperature and tells the system when to run.
The drawing shows a typical layout, and a licensed contractor determines exactly how the system fits the conditions of your specific home.
Get matched in Dallam CountyDallam County, by the numbers
157 severe weather events were recorded in Dallam 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 Dallam County, Texas were built in 1977 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesDallam County, Texas holds 3,052 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 64.0% of the occupied homes in Dallam County, Texas (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Governing Central AC Installation in Dallam 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.
Licensing and Legal Requirements in Dallam 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 Dallam County
Weather puts real demands on cooling equipment, and those demands vary by location. What the climate does in this part of Texas shapes how hard a central AC system has to work and what it needs to hold up over time.
157 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.