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A furnace install in this area starts with a sizing question a contractor has to get right before anything else. 173 severe weather events were recorded in Geneva County, Alabama between 2015 and 2024. At that rate of severe weather, the system a contractor puts in will be working against real seasonal load year after year, and a furnace that is undersized for this climate runs harder and longer to keep up. A contractor who knows the local record sizes to what the house actually needs here, not to a default figure from a catalog.
Ductwork laid into a house decades before today's furnaces existed was sized and routed for a different machine. Half the homes in Geneva County, Alabama were built in 1979 or earlier (2020-2024 ACS 5-year). A furnace running at the efficiencies common to new equipment today pushes against static pressures the original trunk lines were never calculated to handle, and a contractor who skips that measurement before the install commits the homeowner to a system that will either short-cycle or underperform regardless of how good the unit itself is. The duct layout, its condition, and how it connects to the new equipment are where a Geneva County installation job is won or lost.
What Gets Installed With a New Furnace
The furnace itself sits inside the house, almost always in a basement, utility closet, or dedicated mechanical room. It is the unit that produces heat. A flue or vent pipe runs from the furnace to an exterior wall or through the roof, carrying combustion gases out of the house.
The air handler components built into or paired with the furnace connect to a thermostat mounted on an interior wall, which is what the homeowner uses to set and adjust temperatures. A filter housing sits at the return-air intake, where incoming air passes through before reaching the heat exchanger.
The drawing shows a general layout of these components, and a licensed contractor determines exactly what applies to your house and its existing setup.
Get matched in Geneva CountyGeneva County by the numbers
173 severe weather events were recorded in Geneva County, Alabama 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 Geneva County, Alabama were built in 1979 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesGeneva County, Alabama holds 12,584 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 78.1% of the occupied homes in Geneva County, Alabama (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Governing Furnace Installation in Geneva County, Alabama5 sourced rules and standards
What the Contractor Does on Install Day
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 HVAC Work in Geneva County, Alabama
Alabama requires state certification to do heating, air conditioning and refrigeration contracting: nobody may advertise, bid, pull permits or do the work unless the person in responsible charge is a certified contractor.
Severe Weather Events in Geneva County
Weather in Geneva County puts real hours on heating and cooling equipment. Furnaces that cycle hard through weather stress need hardware sized and installed for local conditions, and that is a judgment call a local contractor makes.
173 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.