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A contractor quoting a heat pump installation in Union County starts with the house: its layout, insulation, window exposure, and how the space actually holds heat or loses it. 32 severe weather events were recorded in Union County, Indiana between 2015 and 2024. At that rate, severe weather is a real but occasional variable, not the dominant pressure shaping every sizing decision. What drives the install is the building itself, and a contractor who skips the load calculation and reaches for a standard-sized unit is guessing. The conditions outside matter, but the conditions inside are what the equipment will run against every day.
Ductwork laid down for a furnace and central air was sized for a different kind of system entirely. Half the homes in Union County, Indiana were built in 1970 or earlier (2020-2024 ACS 5-year). A heat pump moves conditioned air at lower temperatures and higher volumes than the equipment most of that ductwork was originally built around, so what a contractor has to determine before anything else is whether those ducts will actually deliver what the new unit produces. The electrical service gets the same look, since the draw a heat pump places on a panel can require a circuit that was never roughed in.
What a Heat Pump Involves, Piece by Piece
The outdoor unit is the piece a homeowner notices first. It sits on a pad outside the house and holds the compressor and a large coil that exchanges heat with the outside air. Inside, an air handler or furnace-style cabinet takes its place in a mechanical room, basement, or closet and moves conditioned air through the home.
A refrigerant line set runs between the two units, carrying refrigerant through insulated copper tubing that passes through an exterior wall. A thermostat on an interior wall ties the whole system together, reading the house temperature and telling the equipment when to run.
The drawing shows a typical layout, and a licensed contractor determines what applies to your specific house.
Find a contractor in Union CountyUnion County by the numbers
32 severe weather events were recorded in Union County, Indiana 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 Union County, Indiana were built in 1970 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesUnion County, Indiana holds 3,255 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 79.8% of the occupied homes in Union County, Indiana (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Union County
Weather puts a measurable load on heating and cooling equipment, and that load varies by location. A heat pump sized and installed for what Union County actually sees will hold up better and run more efficiently than one built for somewhere else.
32 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.