Tell us about the job
Takes about a minute. No obligation.
Sizing a heat pump for this county starts with what the local climate actually demands, not with a standard table. 62 severe weather events were recorded in Marengo County, Alabama between 2015 and 2024. At that rate, severe weather is a recurring part of the operating environment rather than a rare interruption, which means a contractor has to account for it when selecting equipment capacity and placing outdoor components. A system undersized or poorly sited for this load will cycle harder and recover more slowly after weather events push the house off temperature. That is the specification problem a contractor works out before anything gets ordered.
Ductwork sized and routed for older heating equipment does not automatically carry a heat pump's airflow requirements, and in Marengo County that gap between what was built and what a new system needs is where most of the real sizing decisions land. Half the homes in Marengo County, Alabama were built in 1982 or earlier (2020-2024 ACS 5-year). A contractor quoting a heat pump here checks the existing duct runs for capacity and leakage before the equipment selection means much. What the ducts can actually deliver shapes the install more than the unit on the pad does.
What a Heat Pump Installation Covers
The outdoor unit is the piece most homeowners see first. It sits on a pad or mounting brackets outside the house and holds the compressor and the outdoor coil. Inside, the air handler mounts in a mechanical room, closet, or attic space and moves conditioned air through the home.
A refrigerant line set runs between the two units, carrying the working fluid back and forth through insulated copper tubing. A thermostat goes on an interior wall where it reads the home's temperature and signals the system to run or stop.
The drawing shows a representative layout, and a licensed contractor determines exactly what applies to this house.
Get matched in Marengo CountyMarengo County, by the numbers
62 severe weather events were recorded in Marengo 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 Marengo County, Alabama were built in 1982 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesMarengo County, Alabama holds 9,867 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 70.2% of the occupied homes in Marengo County, Alabama (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Behind Heat Pump Installation in Marengo County, Alabama1 sourced rules and standards
Licensing and Legal Requirements in Marengo 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 Marengo County
Weather patterns shape how hard heating and cooling equipment has to work, and in Marengo County that workload is set by local conditions, not a national average. A heat pump sized and installed for this area has to hold up against whatever the county's climate delivers.
62 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.