What New Hampshire homes are up against.
NOAA National Centers for Environmental Information, Storm Events Database, bulk CSV export, events 2015-01-01 through 2024-12-31. · U.S. Census Bureau, 2020-2024 American Community Survey 5-Year Estimates
A contractor quoting a heat pump in New Hampshire has to get the sizing right before anything else, because the margin for error compresses fast once the system is actually running. Homes in New Hampshire run heat about nine months a year, from September through May. A unit that is undersized or installed without accounting for the house's actual load does not get a long off-season to recover quietly. The faults surface early, and they surface at the worst time, when demand is highest and the equipment has no slack left.
Before a contractor can size a heat pump for a house, they have to know what the house already has. Ducts that were built for a furnace run at different pressures and flow rates than a heat pump requires, and the electrical panel may not carry the load without an upgrade. Neither of those things can be read from the outside. Half the homes in New Hampshire were built in 1979 or earlier (2020-2024 ACS 5-year). That spread is statewide, so a contractor working anywhere from Nashua to Colebrook is opening the same questions on the same share of jobs: what condition are the ducts in, what does the panel actually show, and what has to change before installation can begin.
Does your county put extra stress on HVAC equipment?
2015–2024 · Source: NOAA National Centers for Environmental Information, Storm Events Database.
A condenser sitting outside through New Hampshire winters faces ice load, driven snow, freeze-thaw cycles, and wind that works its way into cabinet seams. Equipment sized or positioned without accounting for that exposure will be asked to work harder than it was specced for, and it will show it. The contractor you are matched with knows what the local conditions demand and uses that to size, position, and configure the system for the site it will actually live on.
New Hampshire HVAC Contractor License Requirements
New Hampshire sets its own rules for who can perform HVAC installation and repair work in the state. The provisions below are quoted from state sources, not paraphrased.
New Hampshire's mechanical licensing board issues nine credentials — hearth system, four fuel gas endorsements, domestic appliance technician, and master, journeyman and apprentice plumber — and a licensee may not work outside the specialty their licence names. None of the nine is an HVAC licence.
A state license requirement means that HVAC work on your home is legally reserved for contractors who hold the credential New Hampshire recognizes for this trade. Sending a request through this site routes you to contractors who carry that license. That is the filter every request passes through before it reaches anyone.
Read the source provisions2 provisions
New Hampshire's mechanical licensing board issues nine credentials — hearth system, four fuel gas endorsements, domestic appliance technician, and master, journeyman and apprentice plumber — and a licensee may not work outside the specialty their licence names. None of the nine is an HVAC licence.
New Hampshire does not license HVAC as a trade, and says so where it matters: the plumbing licence expressly does not reach a person installing heating, cooling, air conditioning or domestic water heating systems, whether solar, oil, gas or electric. The gas piping on a gas-fired system is a separate matter and needs a fuel gas fitter licence.