Furnace vs Boiler in Merrimack County, New Hampshire
When a furnace makes sense
If your house already has ductwork, a furnace is the straightforward choice. Those same ducts can carry cool air in summer if you ever add central air, which a boiler can't do. Just over half the homes in this region already have ductwork in place, and with nine months of heating ahead and nights near 14°F, a furnace that matches what's already there is worth keeping.
When a boiler makes sense
If your home already heats through radiators or in-floor pipes, a boiler is worth keeping rather than tearing out for ductwork. It runs about 5% cheaper here than a furnace, and the heat stays steady through the coldest nights instead of cycling on and off. That steady heat matters most when nights average 14°F for nine months of the year.
When a furnace makes sense
If your house already has ductwork, a furnace is the straightforward choice. Those same ducts can carry cool air in summer if you ever add central air, which a boiler can't do. Just over half the homes in this region already have ductwork in place, and with nine months of heating ahead and nights near 14°F, a furnace that matches what's already there is worth keeping.
When a boiler makes sense
If your home already heats through radiators or in-floor pipes, a boiler is worth keeping rather than tearing out for ductwork. It runs about 5% cheaper here than a furnace, and the heat stays steady through the coldest nights instead of cycling on and off. That steady heat matters most when nights average 14°F for nine months of the year.
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 Merrimack 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 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 New England that heat with one | 54.8% | 26.2% |
| Handles a 14°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. Those same ducts can carry cool air in summer if you ever add central air, which a boiler can't do. Just over half the homes in this region already have ductwork in place, and with nine months of heating ahead and nights near 14°F, a furnace that matches what's already there is worth keeping.
When a boiler makes sense
If your home already heats through radiators or in-floor pipes, a boiler is worth keeping rather than tearing out for ductwork. It runs about 5% cheaper here than a furnace, and the heat stays steady through the coldest nights instead of cycling on and off. That steady heat matters most when nights average 14°F for nine months of the year.
A Merrimack County contractor will price both against your own house, your ductwork and your panel.
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