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A furnace contractor quoting in Kendall County has to work out what the local climate actually demands before settling on equipment size or installation spec. 55 severe weather events were recorded in Kendall County, Texas between 2015 and 2024. At that rate, severe weather is an occasional disruption, and a system installed here carries a lighter environmental load than equipment in harder-hit parts of the state. What drives proper sizing in this county is the heating load of the structure itself and the quality of the duct work, not accumulated storm exposure. A contractor who gets those calculations wrong produces a system that short-cycles or runs hard every winter, regardless of what the weather outside does.
Ductwork sized and installed for a house built in that era was not designed around a radically different generation of equipment. Half the homes in Kendall County, Texas were built in 2002 or earlier (2020-2024 ACS 5-year). That puts the structural constraint in a different place than contractors often expect when they first hear a median year: the electrical service and load calculations, not the ducting, are where the real evaluation happens on most jobs here. A contractor who assumes the duct layout will be the problem is looking at the wrong line item.
What Gets Installed With a New Furnace
The furnace itself sits in a utility room, basement, or closet at the center of the house. It holds the heat exchanger, the blower, and the burner assembly, all housed in a single metal cabinet. That cabinet is what a contractor sets in place and connects to the rest of the system.
The flue pipe runs from the furnace up through the house and exits at the roof or an exterior wall, carrying combustion gases out. The thermostat mounts on a main living area wall and is the control point between the homeowner and the furnace. A contractor also installs or ties in the gas line connection and the condensate drain where the equipment calls for one.
The drawing shows a typical layout, and a licensed contractor determines exactly what applies to your house.
Find a contractor in Kendall CountyKendall County by the numbers
55 severe weather events were recorded in Kendall 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 Kendall County, Texas were built in 2002 or earlier (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesKendall County, Texas holds 19,213 housing units (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesOwners occupy 79.5% of the occupied homes in Kendall County, Texas (2020-2024 ACS 5-year).
U.S. Census Bureau, 2020-2024 American Community Survey 5-Year EstimatesFurnace Installation Rules for Kendall County, Texas5 sourced standards and codes
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 and Legal Requirements in Kendall 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 Kendall County
Weather places a real load on heating and cooling equipment, and that load is shaped by what actually happens in this part of Texas. A furnace sized and installed for local conditions holds up differently than one that was not.
55 severe weather events, 2015–2024. Source: NOAA National Centers for Environmental Information, Storm Events Database.