Furnace vs Boiler in St. Joseph County, Indiana
When a furnace makes sense
If your house already has ductwork, a furnace is the straightforward choice. It's what most homes in this region are set up for, and those same ducts can carry central air if you ever add cooling. Heat is needed here about 8 months a year with winter nights averaging 20°F, and a furnace is built to run through all of it.
When a boiler makes sense
A boiler makes sense if your home already has radiators or in-floor pipes instead of ducts, since that's how it delivers heat. It runs about 5% cheaper than a furnace at Indiana prices, which adds up over 8 months of heating with nights near 20°F. It won't move air for cooling, so you'd need another way to handle summer.
When a furnace makes sense
If your house already has ductwork, a furnace is the straightforward choice. It's what most homes in this region are set up for, and those same ducts can carry central air if you ever add cooling. Heat is needed here about 8 months a year with winter nights averaging 20°F, and a furnace is built to run through all of it.
When a boiler makes sense
A boiler makes sense if your home already has radiators or in-floor pipes instead of ducts, since that's how it delivers heat. It runs about 5% cheaper than a furnace at Indiana prices, which adds up over 8 months of heating with nights near 20°F. It won't move air for cooling, so you'd need another way to handle summer.
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 St. Joseph 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 and no 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 20°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. It's what most homes in this region are set up for, and those same ducts can carry central air if you ever add cooling. Heat is needed here about 8 months a year with winter nights averaging 20°F, and a furnace is built to run through all of it.
When a boiler makes sense
A boiler makes sense if your home already has radiators or in-floor pipes instead of ducts, since that's how it delivers heat. It runs about 5% cheaper than a furnace at Indiana prices, which adds up over 8 months of heating with nights near 20°F. It won't move air for cooling, so you'd need another way to handle summer.
A St. Joseph County contractor will price both against your own house, your ductwork and your panel.
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