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Furnace sizing in this part of West Virginia is a local calculation, not a catalog selection. 146 severe weather events were recorded in Raleigh County, West Virginia between 2015 and 2024. At that rate of severe weather, the heating load a contractor is sizing against is real and recurring, which means a unit built for a milder climate will be working above its design threshold on a routine basis. A contractor working in Raleigh County accounts for that load before committing to a unit size, because an undersized furnace short-cycles in moderate conditions and runs to exhaustion when the weather turns hard.
Ductwork laid in for an older furnace carries assumptions about airflow, trunk sizing, and return placement that a modern unit does not share. Half the homes in Raleigh County, West Virginia were built in 1977 or earlier (2020-2024 ACS 5-year). A contractor quoting a furnace replacement in a house from that era has to assess what the existing duct system will actually do with the new equipment's output before the equipment choice means much. If the runs are undersized or the returns are poorly placed, the install scope grows before the unit is ever ordered.
What Gets Installed With a New Furnace
The furnace itself sits in a mechanical room, basement, or utility closet and is the box that generates heat by burning fuel or running electrical elements. Attached to it, the heat exchanger transfers that warmth to air moving through the unit, while the blower motor pushes that air out into the home.
The flue or exhaust vent runs from the furnace to an exterior wall or through the roof, carrying combustion gases out of the house. A thermostat mounts on an interior wall and serves as the control point, telling the furnace when to fire and when to stop.
The drawing shows a typical layout, and a licensed contractor determines exactly what the configuration looks like in your home.
Find a contractor in Raleigh CountyRaleigh County, by the numbers
146 severe weather events were recorded in Raleigh County, West Virginia 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 Raleigh County, West Virginia were built in 1977 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesRaleigh County, West Virginia holds 34,604 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 75.3% of the occupied homes in Raleigh County, West Virginia (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Governing Furnace Installation in Raleigh County, West Virginia5 sourced rules & standards
What the Installation Actually 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.
Licensing Rules for Contractors in Raleigh County, West Virginia
West Virginia requires a licence from the Commissioner of Labor to perform, or offer to perform, work on a heating, ventilating and cooling system.
Severe Weather History in Raleigh County
Raleigh County's weather puts real stress on heating equipment over time. A furnace sized and installed for local conditions holds up better than one spec'd for somewhere else.
146 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.