Furnace vs Boiler in Ada County, Idaho
When a furnace makes sense
If your home already has ductwork, a furnace uses it directly, and most homes in this region are set up this way. Eight months of heating with nights near 25°F is ordinary work for a furnace. It runs on the same gas line most homes here already use.
When a boiler makes sense
If your home heats through radiators or in-floor pipes instead of ducts, a boiler is built for that, and a furnace is not an option without adding ductwork. Boiler heat also runs about 5% cheaper here than a furnace, which adds up over eight months of winter. For a home already set up for it, that makes the boiler worth choosing on its own terms.
When a furnace makes sense
If your home already has ductwork, a furnace uses it directly, and most homes in this region are set up this way. Eight months of heating with nights near 25°F is ordinary work for a furnace. It runs on the same gas line most homes here already use.
When a boiler makes sense
If your home heats through radiators or in-floor pipes instead of ducts, a boiler is built for that, and a furnace is not an option without adding ductwork. Boiler heat also runs about 5% cheaper here than a furnace, which adds up over eight months of winter. For a home already set up for it, that makes the boiler worth choosing on its own terms.
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 Ada County.
In the Mountain West, 69.6% of homes heat with a furnace, so most already have the ductwork it needs.
If your home already heats through radiators or in-floor pipes instead of ducts, 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 Mountain West that heat with one | 69.6% | 4.3% |
| Handles a 25°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 uses it directly, and most homes in this region are set up this way. Eight months of heating with nights near 25°F is ordinary work for a furnace. It runs on the same gas line most homes here already use.
When a boiler makes sense
If your home heats through radiators or in-floor pipes instead of ducts, a boiler is built for that, and a furnace is not an option without adding ductwork. Boiler heat also runs about 5% cheaper here than a furnace, which adds up over eight months of winter. For a home already set up for it, that makes the boiler worth choosing on its own terms.
A Ada County contractor will price both against your own house, your ductwork and your panel.
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