Furnace vs Boiler in Jefferson County, Kentucky
When a furnace makes sense
If your home already has ductwork, a furnace makes sense, and most homes in Jefferson County do. It also pairs with central air, so the same ducts move warm air in winter and cool air the other seven months. A furnace responds fast on a 27°F night, which matters here from December through February.
When a boiler makes sense
A boiler suits a home with radiators or in-floor heat already in place, rather than ducts. It runs about 5% cheaper than a furnace at Kentucky gas prices, which adds up over 7 months of heating season. If you want central air too, you will need a separate system, since a boiler only heats.
When a furnace makes sense
If your home already has ductwork, a furnace makes sense, and most homes in Jefferson County do. It also pairs with central air, so the same ducts move warm air in winter and cool air the other seven months. A furnace responds fast on a 27°F night, which matters here from December through February.
When a boiler makes sense
A boiler suits a home with radiators or in-floor heat already in place, rather than ducts. It runs about 5% cheaper than a furnace at Kentucky gas prices, which adds up over 7 months of heating season. If you want central air too, you will need a separate system, since a boiler only heats.
Furnace
- Runs on
- Natural gas
- What it does
- Heats only
- Tax credit
- No federal tax credit since the end of 2025
Sources: U.S. Department of Energy · Internal Revenue Code
Boiler
- Runs on
- Natural gas
- What it does
- Heats only
- Tax credit
- No federal tax credit since the end of 2025
Sources: U.S. Department of Energy · Internal Revenue Code
Furnace wins in Jefferson County.
Most homes here were built in 1972, back when duct systems were standard, so a furnace fits what's already in your walls.
If your home already has radiators or in-floor heating loops instead of ductwork, a boiler is still the better choice.
Find a contractor| Compared on | Furnace | Boiler |
|---|---|---|
| Cost to run here | Costs more to run | About 5% less to run |
| What it does | Heats only | Heats only |
| Handles a 27°F night | Yes | Yes |
Sources: U.S. Energy Information Administration, U.S. Department of Energy, NOAA
When a furnace makes sense
If your home already has ductwork, a furnace makes sense, and most homes in Jefferson County do. It also pairs with central air, so the same ducts move warm air in winter and cool air the other seven months. A furnace responds fast on a 27°F night, which matters here from December through February.
When a boiler makes sense
A boiler suits a home with radiators or in-floor heat already in place, rather than ducts. It runs about 5% cheaper than a furnace at Kentucky gas prices, which adds up over 7 months of heating season. If you want central air too, you will need a separate system, since a boiler only heats.
A Jefferson County contractor will price both against your own house, your ductwork and your panel.
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