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Sizing and refrigerant charge have to be right from day one in a house here. Homes in Orleans Parish, LA run cooling about six months a year, from May through October. The compressor starts and stops through that entire stretch, and every cycle adds wear to the contactor, the condenser fan motor, and the compressor itself. A unit that a contractor sized too small runs longer each cycle trying to satisfy the thermostat, which accelerates that wear further. Sloppy installation hides nothing in a climate that keeps the equipment working this hard.
Ductwork laid in for equipment that no longer exists shapes what a new central AC installation runs into here. Half the homes in Orleans Parish, Louisiana were built in 1960 or earlier (2020-2024 ACS 5-year). That means a contractor opening walls or pulling permits in a typical Orleans Parish house is working around a distribution system that predates the unit being replaced by a substantial margin. Whether the existing ducts can carry the airflow a new system needs, and whether the electrical service will handle the load, are the two questions that set the scope of the job. The ductwork is where that answer usually lives.
What Gets Installed With a New Central AC
The outdoor condenser unit sits on a pad outside the house and holds the compressor and condenser coil, the two components doing the heaviest work in the system. Inside, the air handler or furnace cabinet stands in a utility space, attic, or closet and holds the evaporator coil along with the blower that moves air through the home.
The refrigerant lines run between the outdoor unit and the indoor cabinet, connecting the two halves of the system through the wall or floor. A thermostat goes on an interior wall and gives the homeowner control over when the system runs and what temperature it holds.
The drawing shows a typical layout, and a licensed contractor determines what applies to this particular house.
Get matched in Orleans ParishOrleans Parish by the Numbers
54 severe weather events were recorded in Orleans Parish, Louisiana 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 Orleans Parish, Louisiana were built in 1960 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOrleans Parish, Louisiana holds 195,552 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 51.2% of the occupied homes in Orleans Parish, Louisiana (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRules & Standards Governing Central AC Installation in Orleans Parish, Louisiana9 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 Orleans Parish, Louisiana
Louisiana requires an active state contractor licence: it is unlawful to engage or continue in the business of contracting, or to act as a contractor, without one.
Severe Weather Events in Orleans Parish
Orleans Parish weather puts real demands on cooling equipment, and those demands shape what a system needs to handle over its life. Sizing and installing central AC here is a local decision, not a generic one.
54 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.