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A contractor quoting a heat pump install here has to account for what this area actually puts equipment through, because the load is not theoretical. 133 severe weather events were recorded in Lawrence County, Alabama between 2015 and 2024. At that rate, severe weather is a standing condition of operating in this county, and a system sized for mild demand will be undersized for the reality. That shapes how a contractor selects equipment, plans refrigerant capacity, and specifies the mounting and weatherproofing from the first visit.
Ductwork in a house this old was designed around whatever system the builder specified at the time, and heat pumps move air differently than the equipment those ducts were built to serve. Half the homes in Lawrence County, Alabama were built in 1990 or earlier (2020-2024 ACS 5-year). That gap between original design and current equipment is where a contractor doing a heat pump installation spends real time: checking whether the existing duct runs can carry the airflow a new unit needs, and whether the electrical service has the capacity to run it. If the ducts fall short, they get modified or replaced before the new unit goes in.
What Gets Installed With a New Heat Pump
The outdoor unit is the piece a homeowner sees first, mounted on a concrete pad beside the house, and it holds the compressor and condenser coil that do the heaviest work of the system. Inside the home, the air handler sits in a utility closet, attic, or basement and pushes conditioned air through the house.
A refrigerant line set runs between the two units, connecting them through a small penetration in the wall, and a thermostat goes on an interior wall where it reads the air temperature and tells the system when to run. Some homes also take an auxiliary heat strip inside the air handler, which a contractor installs alongside the main equipment.
The drawing shows the general layout of a heat pump system, and a licensed contractor determines exactly what applies to this house.
Get matched in Lawrence CountyLawrence County, Alabama, by the numbers
133 severe weather events were recorded in Lawrence 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 Lawrence County, Alabama were built in 1990 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesLawrence County, Alabama holds 15,403 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 81.7% of the occupied homes in Lawrence County, Alabama (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRules & Standards Behind Heat Pump Installation in Lawrence County, Alabama1 sourced rules and standards
Licensing Rules for Lawrence 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 Lawrence County
Local weather conditions drive how hard heating and cooling equipment works, and how long it lasts. A heat pump sized and installed for what this area actually throws at it performs differently than one built to a generic spec.
133 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.