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Sizing a central AC system for Franklin County means accounting for what the compressor, condenser fan, and contactor will actually be asked to do across a summer. Homes in Franklin County, KS run cooling about four months a year, from June through September. A unit that is undersized, or one where the refrigerant charge and airflow were set carelessly at installation, runs longer cycles under peak load and builds heat stress into the compressor from the first hot week. The contactor clicks through more switching events than a loose installation estimate assumes, and wear on those parts is not recoverable by the time fall arrives. A contractor quoting this job should run a full load calculation against the house, not borrow a number from the old unit's nameplate.
Ductwork laid down for a system no longer made was sized around different static pressure, different return placement, and different load assumptions than a modern central AC unit carries. Half the homes in Franklin County, Kansas were built in 1975 or earlier (2020-2024 ACS 5-year). A contractor pricing an installation here measures and tests what is already in the walls before the equipment conversation goes anywhere, because ductwork that cannot move the volume the new unit expects will either undercut efficiency from day one or require its own work before the install can close. The electrical service gets the same look: a panel sized for a lighter load may need an upgrade before a new condenser can run on it.
What a Central AC System Includes
The outdoor condenser unit sits on a pad beside the house and holds the compressor and condenser coil, the mechanical core of the system. Inside, the air handler or furnace-mounted evaporator coil sits where conditioned air enters the duct system. Together these two pieces are what a new Central AC installation puts in place.
The refrigerant line set runs between the indoor and outdoor units, carrying the working fluid that makes the system function as one. A thermostat on an interior wall gives the homeowner control over when and how the system runs. The condensate drain line routes moisture pulled from the air out of the house.
The drawing shows a typical layout, and a licensed contractor determines what applies to this particular house.
Get matched in Franklin CountyFranklin County, Kansas, by the numbers
123 severe weather events were recorded in Franklin County, Kansas 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 Franklin County, Kansas were built in 1975 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesFranklin County, Kansas holds 11,310 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 72.2% of the occupied homes in Franklin County, Kansas (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRules & Standards Behind Central AC Installation in Franklin County, Kansas8 sourced rules and standards
What happens on installation day in Franklin 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.
Severe Weather in Franklin County
Weather here puts real demands on cooling equipment, and those demands are specific to this part of Kansas. What a system handles over its life shapes how it should be sized and installed from the start.
123 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.