HVAC Installation in Concord, NH
A new system here will heat from September through May and cool from July through August every year. Tell us about the house, and a licensed contractor who covers Merrimack County will get in touch.
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A system built for eleven months of work
Concord asks for heat from September through May and cooling in July and August. That is eleven months a year your system is running, with only a short break in between. Winter nights average 14°F, cold enough that a furnace or heat pump has to work hard, often and steadily, to keep a house warm. Summer afternoons average 79°F, so the cooling side still matters even with a short season.
A third of homes here heat with fuel oil, and whatever fuel yours uses, the equipment has to be sized for real winter nights, not a mild average. Storms are part of the picture too. Merrimack County has seen 35 winter storms and 79 damaging wind events over the past ten years, and statewide, 22% of households lost power for at least 24 hours in 2024. A new install is a chance to plan for that, not just for the temperature swings.
- 9 months
- September through May, your system heats
- 2 months
- July through August, it cools
- 14°F
- the average winter night it heats against
- 79°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
New Hampshire has no state license for HVAC contractors.
There is no state board behind this trade here. No test, no state number, no record kept in Concord. Any business can call itself an HVAC contractor in New Hampshire, so the name on the truck tells you nothing the state stood behind.
For a heating and cooling installation, the protection comes from the local building office instead. In most cities and counties here, putting in a new furnace, air conditioner or heat pump needs a permit, and an inspection once the work is done. That permit and inspection are what stand behind the job in this state, not a license.
Source: New Hampshire General Court
- When should I replace my HVAC system?
- Replace it when repairs stop making sense or the system can't keep up anymore. A furnace or air conditioner working hard every day for years starts breaking down more often, and each repair is money spent on equipment that's still getting older. Rising energy bills with no other explanation, uneven heating or cooling room to room, and a system that needs a technician more than once a season are all signs the equipment is done. Given how many months a year homes here need heat or cooling, a system on its last legs will make itself known fast. A contractor can look at the age and condition of what you have and tell you whether repair still makes sense.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, replacing them together is usually the better call, though it depends on the condition of each. A furnace and air conditioner installed at the same time are matched to work together, and when one is much newer than the other, the older unit can end up limiting how well the new one performs. Homes here need heat for 9 months and cooling for only 2, so the furnace does most of the work and tends to wear out first. If your air conditioner still has years left in it, a contractor can tell you whether it's worth pairing with a new furnace or replacing separately.
- What happens during an HVAC installation?
- A contractor removes the old equipment, sets the new furnace, air conditioner or heat pump in place, and connects it to the ductwork, gas line or electrical circuit and refrigerant lines it needs. Once it's connected, they test it, check for leaks, and confirm it's heating or cooling the way it should before they leave. In most places, including here, this work needs a permit from the local building office and an inspection once it's done, since New Hampshire has no state license for HVAC contractors and permitting is how the work gets checked. Expect the contractor to pull that permit and schedule the inspection as part of the job.