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Sizing a furnace for this house is not a generic calculation. Homes in Hickory County, MO run heat about seven months a year, from October through April. The burner and heat exchanger cycle through that full run every year, and a unit that was underspecified at installation accumulates stress on those components steadily, with little off-season to slow it. A contractor quoting a replacement here has to establish what the existing system was asked to carry before settling on a new capacity, because the load this county places on a furnace is what the next one has to be built around.
Ductwork laid out for a furnace that has been gone for decades was built to move a different volume of air than what a new unit pushes. Half the homes in Hickory County, Missouri were built in 1983 or earlier (2020-2024 ACS 5-year). That age of housing carries trunk lines, branch runs, and return configurations that made sense for whatever was running then, and a contractor sizing a new furnace has to measure what those ducts will actually carry before anything else. If the existing layout cannot handle the new system's airflow, the duct work becomes part of the job, and the quote changes accordingly.
What Gets Installed With a New Furnace
The furnace itself sits in a utility room, basement, or closet and is the heart of what gets purchased. A burner assembly inside it generates heat, and a heat exchanger transfers that heat to the air moving through the unit. The blower motor then pushes that warmed air into the supply side of the duct system.
The flue pipe runs from the furnace up and out of the house, carrying combustion gases safely outside. Alongside it, a new furnace installation includes the gas valve and manifold that control fuel delivery, and a control board that coordinates ignition, the blower, and any connected thermostat. The thermostat itself mounts on an interior wall and serves as the point where the homeowner sets and reads temperatures.
The drawing shows a typical furnace layout, and a licensed contractor determines exactly what applies to your house.
Get matched in Hickory CountyHickory County, by the numbers
87 severe weather events were recorded in Hickory 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 Hickory County, Missouri were built in 1983 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesHickory County, Missouri holds 5,480 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 82.4% of the occupied homes in Hickory County, Missouri (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesFurnace Installation Rules for Hickory County, Missouri4 codes, standards, and laws
What the installation work looks like
Non-weatherized gas furnaces manufactured on or after November 19, 2015 must reach 80.0 percent AFUE.
Non-weatherized oil-fired furnaces manufactured on or after November 19, 2015 must reach 83.0 percent AFUE.
Mobile home gas furnaces manufactured on or after November 19, 2015 must reach 80.0 percent AFUE.
Non-weatherized gas furnaces manufactured on or after December 18, 2028 must reach 95.0 percent AFUE, up from the 80.0 percent minimum that applies to units manufactured before that date.
Severe Weather Events in Hickory County
Weather in this part of Missouri puts real demands on heating equipment: hard cold snaps and sharp seasonal swings shorten equipment life and push systems harder than moderate climates do. What a furnace has to handle here is a local question, and the installation choices a contractor makes should reflect it.
87 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.