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Sizing a heat pump for Putnam County means solving a problem that does not exist the same way everywhere: as outdoor temperatures fall through the coldest part of the season, a heat pump's capacity falls with them, and backup heat has to cover the gap. Homes in Putnam County, MO run heat about eight months a year, from October through May. A contractor quoting an installation here has to establish the coldest design temperatures the system will face, not just the average load, before they can specify a unit or size the backup element. Get that wrong and the resistance heat runs far more than it should, quietly pulling the operating cost up every month it is needed.
Ductwork laid in for one type of system does not automatically carry another. Half the homes in Putnam County, Missouri were built in 1976 or earlier (2020-2024 ACS 5-year). That generation of housing was built around equipment that no longer runs in most of it, and the ducts reflect those original decisions: their routing, their cross-sections, their connections at the registers. A contractor quoting a heat pump in Putnam County sizes the duct system before settling on a unit, because what is already in the walls sets the ceiling on what can be installed.
What a Heat Pump Installation Covers
The outdoor unit sits on a pad beside the house and holds the compressor and the coil that exchanges heat with the outside air. The indoor air handler mounts inside, usually in a utility closet, basement, or attic, and moves conditioned air through the home. Together these two units are what a contractor is placing and connecting.
A refrigerant line set runs between the two units, carrying refrigerant back and forth through insulated copper tubing. A thermostat goes on an interior wall and gives the homeowner control over the whole system. The contractor also ties in a condensate drain line from the air handler to carry away any moisture the unit pulls from the air.
The drawing beside this text shows a typical layout, and a licensed contractor determines exactly what applies to your house.
Find a contractor in Putnam CountyPutnam County by the Numbers
50 severe weather events were recorded in Putnam County, Missouri 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 Putnam County, Missouri were built in 1976 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesPutnam County, Missouri holds 2,834 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 83.0% of the occupied homes in Putnam County, Missouri (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSevere Weather Events in Putnam County
Putnam County weather puts real demands on heating and cooling equipment, and those demands shape what a heat pump here needs to handle year after year. Sizing and installation decisions are local decisions, and the weather record is part of the picture.
50 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.