Furnace vs Boiler in Johnson County, Indiana
When a furnace makes sense
If your house already has ductwork, a furnace is the straightforward choice. That same ductwork can carry air conditioning too, so you are not paying to install a second system just to cool the house in summer. With winter nights averaging 23°F and heat needed about 8 months of the year, a furnace tied into ducts you already have makes sense.
When a boiler makes sense
A boiler makes sense if your home is set up with radiators or in-floor pipes rather than ducts. Heating with a boiler runs about 5% cheaper here than a furnace, which adds up over an 8 month heating season. It will not give you a way to run central air, so it suits a house where you are not trying to add cooling through the same system.
When a furnace makes sense
If your house already has ductwork, a furnace is the straightforward choice. That same ductwork can carry air conditioning too, so you are not paying to install a second system just to cool the house in summer. With winter nights averaging 23°F and heat needed about 8 months of the year, a furnace tied into ducts you already have makes sense.
When a boiler makes sense
A boiler makes sense if your home is set up with radiators or in-floor pipes rather than ducts. Heating with a boiler runs about 5% cheaper here than a furnace, which adds up over an 8 month heating season. It will not give you a way to run central air, so it suits a house where you are not trying to add cooling through the same system.
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 Johnson County.
In the Great Lakes states, 78.8% of homes heat with a furnace, so most already have the ductwork it needs.
If your home already has radiators or in-floor pipes 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 |
| Homes in the Great Lakes states that heat with one | 78.8% | 7.7% |
| Handles a 23°F night | Yes | Yes |
Sources: U.S. Energy Information Administration, U.S. Department of Energy, NOAA
When a furnace makes sense
If your house already has ductwork, a furnace is the straightforward choice. That same ductwork can carry air conditioning too, so you are not paying to install a second system just to cool the house in summer. With winter nights averaging 23°F and heat needed about 8 months of the year, a furnace tied into ducts you already have makes sense.
When a boiler makes sense
A boiler makes sense if your home is set up with radiators or in-floor pipes rather than ducts. Heating with a boiler runs about 5% cheaper here than a furnace, which adds up over an 8 month heating season. It will not give you a way to run central air, so it suits a house where you are not trying to add cooling through the same system.
A Johnson County contractor will price both against your own house, your ductwork and your panel.
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