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Boiler Repair in New Hampshire
Across New Hampshire as a whole, 38% of households heat with fuel oil. We publish a page for the 30 New Hampshire towns where that share reaches 5%, and oil heat means a boiler far more often than it means anything else.
In brief
Across New Hampshire, 38% of households burn fuel oil. That share is what decides whether a town carries its own page here, and it is also the best free indication of whether the trade that services burners is local.
Source: US Census Bureau, American Community Survey 5-year estimates, table B25040.
Where the oil heat is in New Hampshire
Of the 30 towns we cover here, 18 are at 35% oil or more, 11 are between 15 and 35%, and 1 sit between 5 and 15%. Walpole is highest at 65%.
| Town | Heat with oil | Occupied homes |
|---|---|---|
| Manchester | 27% | 50,709 |
| Nashua | 9% | 36,907 |
| Concord | 20% | 20,362 |
| Dover | 27% | 15,021 |
| Derry | 47% | 13,179 |
| Salem | 53% | 12,573 |
| Portsmouth | 23% | 10,899 |
| Merrimack | 28% | 10,378 |
Source: US Census Bureau, American Community Survey 5-year estimates, table B25040 (house heating fuel), 2023 release. The state figure is weighted across every town we cover in New Hampshire, including those below the threshold for a page. B25040 records the fuel, not the system.
Carbon monoxide, wherever you are
Any appliance that burns fuel can produce carbon monoxide when combustion or venting goes wrong, and CPSC describes low to moderate poisoning as producing symptoms "similar to the flu (but without the fever)". It recommends alarms on every level of the home and outside sleeping areas — but not in kitchens or above the appliance — and annual professional inspection of the heating system.
If an alarm sounds: outside first, then call 911. Not open windows, and not look for the source.
Source: US Consumer Product Safety Commission, Carbon Monoxide Fact Sheet.
What the federal standards require
DOE’s amended minimums are 84% AFUE for gas-fired hot water boilers, 82% for gas-fired steam, 86% for oil-fired hot water and 85% for oil-fired steam — plus no constant-burning pilot on gas units and an automatic means for adjusting water temperature on hot water boilers. What that number does and does not measure is worth ten minutes before any quote.
Source: US Department of Energy, Energy Conservation Standards for Residential Boilers.
Checking a plumber in New Hampshire
The authority is the New Hampshire Office of Professional Licensure and Certification, Mechanical Safety and Licensing Board. New Hampshire licenses plumbers but publishes no online licensee search, so verification means contacting the office directly.
Towns we route in New Hampshire
- Bedford 53% heat with oil
- Belmont 61% heat with oil
- Concord 20% heat with oil
- Derry 47% heat with oil
- Dover 27% heat with oil
- Durham 40% heat with oil
- Exeter 33% heat with oil
- Franklin 42% heat with oil
- Hampton 19% heat with oil
- Henniker 27% heat with oil
- Hooksett 31% heat with oil
- Hudson 24% heat with oil
- Keene 55% heat with oil
- Laconia 43% heat with oil
- Litchfield 41% heat with oil
- Londonderry 47% heat with oil
- Manchester 27% heat with oil
- Meredith 42% heat with oil
- Merrimack 28% heat with oil
- Milford 33% heat with oil
- Nashua 9% heat with oil
- Newmarket 37% heat with oil
- Pelham 46% heat with oil
- Peterborough 48% heat with oil
- Portsmouth 23% heat with oil
- Salem 53% heat with oil
- Seabrook 37% heat with oil
- Somersworth 51% heat with oil
- Tilton 41% heat with oil
- Walpole 65% heat with oil
A boiler is not a furnace, and the person you want knows the difference.Tell us it is a boiler, tell us what the gauge reads if you can see it, and we will route you to somebody in your area who works on them. You are never charged. Boilers give this site its name and not its limits.
Call (888) 510-4130