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Sizing a central AC for a house in Orleans County starts with what the compressor actually faces: a short working season, then a long stretch of standing off. Homes in Orleans County, NY run cooling about two months a year, from July through August. A compressor that cycles up after months of sitting is where a bad install shows itself first. Refrigerant charge, airflow through the coil, and the electrical connections at the contactor all matter more here than wear from extended runtime. A contractor quoting a new system has to get the load calculation right for this specific house, because an undersized unit will run hard through every day it is needed and reveal the error before many seasons pass.
Ductwork in a house designed around gravity heat or no central system at all was sized for a different purpose, and attaching a central AC system to it forces a contractor to work out whether it can move the air a modern unit requires before anything else on the job gets priced. Half the homes in Orleans County, New York were built in 1955 or earlier (2020-2024 ACS 5-year). A house from that era often has supply runs that are too narrow, return paths that barely exist, and electrical service that a new condensing unit will push against. The equipment itself is straightforward to specify. What takes time is measuring what is already in the walls.
What Gets Installed With a New Central AC
The outdoor condenser unit sits on a concrete pad beside the house and holds the compressor and condenser coil, the two components that do the heaviest work in the system. Inside, the air handler mounts in a utility closet, basement, or attic and holds the evaporator coil and blower that moves conditioned air through the home.
The thermostat goes on an interior wall where it reads the air temperature and signals the system to run or stop. A contractor also installs the refrigerant line set, a pair of insulated copper lines that run between the air handler and the condenser unit, and the condensate drain line that carries moisture out of the house.
The drawing shows the general layout of a central AC system, and a licensed contractor determines exactly what applies to your house.
Get matched in Orleans CountyOrleans County, by the facts
80 severe weather events were recorded in Orleans County, New York 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 County, New York were built in 1955 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOrleans County, New York holds 18,326 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 77.2% of the occupied homes in Orleans County, New York (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRules & Standards Governing Central AC Installation in Orleans County, New York8 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.
Severe Weather Events in Orleans County
Weather puts a measurable load on HVAC equipment, and that load varies by where you are. A central AC system sized and installed for Orleans County conditions handles local pressure better than one specced to a generic standard.
80 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.