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A contractor quoting furnace installation in Somervell County starts with the house: its square footage, its insulation, its duct layout. 29 severe weather events were recorded in Somervell County, Texas between 2015 and 2024. At that rate, severe weather is an occasional event here, and sizing a furnace around storm frequency would produce the wrong answer for most homes. What drives the specification is heat loss through walls and ceilings, the efficiency rating of the unit, and how well the ductwork can carry the output to every room. A contractor who gets those right puts in a furnace that fits.
Ductwork laid down for a furnace from the mid-nineties carries air at the volumes and pressures that equipment from that era demanded. Half the homes in Somervell County, Texas were built in 1995 or earlier (2020-2024 ACS 5-year). A contractor sizing a new furnace for a house in this stock has to assess whether the existing duct system moves enough air for the new unit's output, and whether the electrical service supports what it draws. If the ducts are undersized or poorly sealed, the new equipment runs against resistance and the efficiency ratings on the box mean nothing. That assessment happens before any equipment is ordered.
What Gets Installed With a New Furnace
The furnace itself sits in a utility room, basement, or closet and is the unit that generates heat. A burner assembly inside it burns fuel, and a heat exchanger transfers that warmth to the air moving through. The blower motor, housed inside the same cabinet, pushes that heated air out into the supply side of your home.
The flue pipe runs from the furnace cabinet up and out of the house, carrying combustion gases away. A gas valve and control board sit inside the cabinet as well. The thermostat mounts on an interior wall and is the piece you interact with directly, telling the system when to run.
The drawing shows a general layout of these components, and a licensed contractor determines what applies to your specific home and its configuration.
Find a contractor in Somervell CountySomervell County, by the numbers
29 severe weather events were recorded in Somervell County, Texas 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 Somervell County, Texas were built in 1995 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesSomervell County, Texas holds 4,017 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 80.0% of the occupied homes in Somervell County, Texas (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesCodes & Standards Governing Furnace Installation in Somervell County, Texas5 sourced rules and standards
What the installation looks like in Somervell County
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 Somervell County, Texas
In Texas a person may not engage in air conditioning and refrigeration contracting unless that person holds a license issued under the state air conditioning and refrigeration contractor law.
Severe Weather Events in Somervell County
Weather puts a measurable load on heating and cooling equipment, and that load shapes what a furnace has to handle over its working life. What holds true for a county in a milder climate does not hold here, which is why local installation decisions start with local conditions.
29 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.