Tell us about the job
Takes about a minute. No obligation.
A contractor sizing or quoting a central AC install in Washington County has to weigh what the local climate actually demands, and the honest answer is that severe weather here is an event, not a steady grind. 66 severe weather events were recorded in Washington County, Kentucky between 2015 and 2024. At that rate, most systems in this county have spent their working lives in relatively calm air, which means a struggling unit is far more likely to trace back to how it was sized, how it was installed, or how many years it has been running than to weather load. A contractor establishing that before they quote is doing the job right.
Ductwork laid down for older equipment carries assumptions about airflow that a modern central AC system does not share, and in Washington County that gap is where an installation job gets complicated or stays simple. Half the homes in Washington County, Kentucky were built in 1982 or earlier (2020-2024 ACS 5-year). A contractor putting in a new system has to assess whether the existing duct runs can move the volume a current unit pushes, and whether the electrical service will carry the load, before the equipment itself is even priced. What that inspection turns up changes the scope of the job more than any single choice about the unit.
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, which are the mechanical core of the system. Inside, the air handler or furnace-and-coil combination occupies a utility space, basement, or closet and moves conditioned air into the duct system. These are the two main pieces a contractor sets in place.
The refrigerant line set runs between the outdoor and indoor units, 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 the whole system. The condensate drain line runs from the indoor coil to a nearby drain, carrying away the moisture pulled from the air.
The drawing shows a typical layout, and a licensed contractor determines exactly how each piece fits the conditions in your house.
Get matched in Washington CountyWashington County, Kentucky, by the numbers
66 severe weather events were recorded in Washington County, Kentucky 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 Washington County, Kentucky were built in 1982 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesWashington County, Kentucky holds 5,244 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 77.6% of the occupied homes in Washington County, Kentucky (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Governing Central AC Installation in Washington County, Kentucky9 sourced rules and standards
What Happens When a Contractor Comes Out
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 HVAC Work in Washington County, Kentucky
Kentucky requires a licence to practise heating, ventilation and air conditioning contracting: a person may not do the work unless they have met the state licensing requirements.
Severe Weather Events in Washington County
Weather puts a measurable load on heating and cooling equipment, and that load is shaped by what actually happens in this part of Kentucky. Knowing the local pattern is part of sizing and installing central AC that holds up over time.
66 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.