Furnace Installation in La Grange, KY
A new furnace here will run from October through April every year. Tell us about the house, and a licensed contractor who covers Oldham County will get in touch.
Tell us about the job
It takes about a minute.
A furnace built for seven months of winter
In La Grange, furnaces run October through April. That's seven months of the year, with winter nights averaging 26°F. A new furnace has to be sized and installed to handle that whole stretch, not just the coldest night.
Oldham County has seen 10 winter storms and 60 damaging wind events over the past ten years, and close to a quarter of Kentucky households lost power for at least 24 hours in 2024. That's worth planning around when a new furnace goes in. Any non-weatherized gas furnace made after November 2015 has to reach at least 80.0 percent AFUE, so that's the baseline a new installation starts from.
- 7 months
- October through April, your furnace is on duty
- 26°F
- the average winter night it heats against
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
Kentucky requires HVAC contractors to hold a state license.
Kentucky tests contractors through the Department of Housing, Buildings and Construction before it issues a license, and it keeps a record of who holds one. The license belongs to the contractor, not to any one job, so it tells you this person or company met the state's standard, not that this state signed off on your furnace specifically.
For a furnace installation, that record is what stands behind the person in your house. What covers the job itself is the permit and inspection from your local building office, which most cities and counties require when a furnace, air conditioner, heat pump or water heater gets replaced. The inspection is what catches a bad gas connection or a venting mistake after the work is done.
Sources: Kentucky Legislative Research Commission · Kentucky Department of Housing, Buildings and Construction
- What size furnace does my house need?
- A contractor works this out with a load calculation, not a chart based on square footage alone. The calculation accounts for how much heat your house loses through its walls, windows, attic, and air leaks, and this changes the number more than floor space does. Two houses the same size can need different sized furnaces depending on insulation and window count. A furnace that is too big cycles on and off too often, and one that is too small runs constantly and still can't keep up when nights drop to 26 degrees. This is worth getting right rather than guessed at, since homes here need heat seven months of the year.
- How do I know it's time to replace my furnace?
- Age and performance are the two things to weigh. A furnace running past its expected lifespan is more likely to fail right when you need it most, and here that means a cold stretch anytime from October through April. A yellow flame instead of blue, soot near the unit, or heat that no longer keeps up with a 26 degree night are all signs worth having a contractor look at. If a repair call is turning into a bigger question about the furnace itself, that is the point to ask about replacement instead of another fix.
- Is a high-efficiency furnace worth it?
- It depends on how long you plan to stay in the house and how much you run the furnace. Since homes here need heat for seven months of the year, a more efficient furnace has a lot more months to earn back the difference in cost compared to a place with a short winter. Furnaces made after November 2015 are already required to hit at least 80 percent AFUE, so the question is really whether to go higher than that baseline. A contractor can lay out the actual efficiency options and what each would mean for your house.