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A contractor quoting a central AC install in Crenshaw County has to account for what the system will face over its life, not just what the house looks like on the walk-through. 100 severe weather events were recorded in Crenshaw County, Alabama between 2015 and 2024. At that rate, severe weather is a standing condition in this area, which means the load assumptions baked into a properly sized install are different from what a catalog spec sheet assumes. A unit that fits the square footage on paper can still be undersized for what the climate here actually demands. Contractors factor that in before the equipment is ever ordered.
Ductwork laid down for equipment that no longer exists is what a contractor opens a quote around in much of Crenshaw County. Half the homes in Crenshaw County, Alabama were built in 1982 or earlier (2020-2024 ACS 5-year). Trunks and runs from that era were sized for the systems available then, and a new central AC unit draws on that layout whether it fits the load calculation or not. If the existing ductwork cannot carry the airflow a replacement system needs, the contractor prices new runs before the equipment itself becomes the question.
What Gets Installed With a New Central AC
The outdoor condenser unit sits on a concrete pad outside the house and holds the compressor and condenser coil, which together shed heat pulled from inside. The indoor air handler mounts in a utility closet, attic, or basement and houses the evaporator coil and blower that push conditioned air through the home.
A metering device, usually an expansion valve, connects the two main units and controls refrigerant flow between them. The thermostat goes on an interior wall and serves as the control point for the whole system, telling the air handler and condenser when to run.
The drawing shows a typical layout, and a licensed contractor determines exactly what applies to your house.
Get matched in Crenshaw CountyCrenshaw County, by the numbers
100 severe weather events were recorded in Crenshaw County, Alabama 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 Crenshaw County, Alabama were built in 1982 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCrenshaw County, Alabama holds 6,583 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 73.2% of the occupied homes in Crenshaw County, Alabama (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Covering Central AC Installation in Crenshaw County, Alabama9 sourced rules and standards
What HVAC Installation Looks Like in Crenshaw County
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 Crenshaw County, Alabama
Alabama requires state certification to do heating, air conditioning and refrigeration contracting: nobody may advertise, bid, pull permits or do the work unless the person in responsible charge is a certified contractor.
Severe Weather Events in Crenshaw County
Weather places a real load on cooling equipment, and that load varies by location. How hard a system has to work over its life is partly a local question, and the record of severe weather here is part of that picture.
100 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.