Furnace vs Boiler in Knox County, Maine
When a furnace makes sense
If your house already has ductwork, a furnace is the straightforward choice. It ties into what's there and gives you the option to add central air later, since the same ducts carry cooling too. With nine months of heating ahead of you most winters, a system that works with your existing setup is worth more than a small edge in running cost.
When a boiler makes sense
If your home is heated by radiators or in-floor pipes, a boiler is the right fit, since it does not need ducts to work. It runs about 5% cheaper than a furnace at Maine prices, which adds up over nine months of heating and nights averaging 16°F. The tradeoff is that a boiler heats only, so it will not give you central air down the road.
When a furnace makes sense
If your house already has ductwork, a furnace is the straightforward choice. It ties into what's there and gives you the option to add central air later, since the same ducts carry cooling too. With nine months of heating ahead of you most winters, a system that works with your existing setup is worth more than a small edge in running cost.
When a boiler makes sense
If your home is heated by radiators or in-floor pipes, a boiler is the right fit, since it does not need ducts to work. It runs about 5% cheaper than a furnace at Maine prices, which adds up over nine months of heating and nights averaging 16°F. The tradeoff is that a boiler heats only, so it will not give you central air down the road.
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 Knox County.
In New England, 54.8% of homes heat with a furnace, so just over half 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 New England that heat with one | 54.8% | 26.2% |
| Handles a 16°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 ties into what's there and gives you the option to add central air later, since the same ducts carry cooling too. With nine months of heating ahead of you most winters, a system that works with your existing setup is worth more than a small edge in running cost.
When a boiler makes sense
If your home is heated by radiators or in-floor pipes, a boiler is the right fit, since it does not need ducts to work. It runs about 5% cheaper than a furnace at Maine prices, which adds up over nine months of heating and nights averaging 16°F. The tradeoff is that a boiler heats only, so it will not give you central air down the road.
A Knox County contractor will price both against your own house, your ductwork and your panel.
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