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Sizing a heat pump for Cortland County means working out what the equipment can deliver when outdoor temperatures fall hardest, not just what it can handle in mild weather. Homes in Cortland County, NY run heat about nine months a year, from September through May. Heat pump capacity drops as the air outside gets colder, so a system that looks adequate on paper in October can fall short by January, leaning on electric resistance backup to close the gap. A contractor running a load calculation here has to establish both the peak heating demand and the temperature at which the heat pump loses ground, because those two figures together decide what backup capacity the install actually needs.

Ductwork laid out for a furnace moves air differently than a heat pump needs it to move, and in Cortland County the gap between what the ducts were built for and what a new system requires is where a heat pump installation gets complicated. Half the homes in Cortland County, New York were built in 1961 or earlier (2020-2024 ACS 5-year). That means the majority of the housing stock here was ducted before heat pumps were the equipment going in, and a contractor assessing a job has to check whether the existing distribution system will carry the new unit's airflow patterns before anything else gets priced. The ductwork answers that question. The electrical service is the second variable, sized for a load that preceded today's equipment, and a contractor reads the panel before committing to a final scope.
What Gets Installed With a New Heat Pump

The outdoor unit is the piece a homeowner sees first, mounted on a pad or bracket outside the house, and it holds the compressor and the coil that exchange heat with the outside air. Inside, an air handler is placed in a utility space, basement, or closet, and it moves conditioned air through the home. Together these two units are the core of what a contractor puts in.
A refrigerant line set runs between the outdoor unit and the air handler, connecting the two through a small penetration in the wall. A thermostat goes on an interior wall where it can read the living space accurately, and it becomes the control point for the whole system.
The drawing shows a representative layout, and a licensed contractor determines what the configuration looks like in your specific home.
Get matched in Cortland CountyCortland County, by the numbers
156 severe weather events were recorded in Cortland 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 Cortland County, New York were built in 1961 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCortland County, New York holds 20,841 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 66.3% of the occupied homes in Cortland County, New York (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Cortland County
Heating and cooling equipment is sized and selected for the conditions it will face year after year. What the weather has actually done in this area is part of what determines how hard a heat pump has to work and how well it has to be built to hold up.
156 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.