HVAC Installation in Manchester, NH
A new system here will heat from October through May and cool from July through August every year. Tell us about the house, and a licensed contractor who covers Hillsborough County will get in touch.
Tell us about the job
It takes about a minute.
What Manchester winters and summers ask of a new system
Your new system needs to handle eight months of heat, October through May, with winter nights averaging 16°F. That is a long, cold stretch, and the furnace or heat pump you install has to hold up through all of it. Summer is short here, just July and August, with afternoons averaging 79°F, but the system still needs to cool the house those two months.
Hillsborough County sees real weather. Ten years of records show 72 winter storms and 147 damaging wind events, and statewide, 22% of households lost power for at least 24 hours in 2024. A furnace with a standing pilot keeps working without electricity. One that needs power to ignite will not. That is worth thinking about when you choose what goes into your house.
- 8 months
- October through May, your system heats
- 2 months
- July through August, it cools
- 16°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 license and no state registration for HVAC contractors in New Hampshire, so there is nothing held on file to check. The town, not the state, ends up holding whatever record exists of the work.
In most cities and counties, a new heating and cooling system needs a permit from the local building office, and an inspector checks the finished work before it is signed off. That inspection, not a license, is what stands between you and a bad install here.
Source: New Hampshire General Court
- When should I replace my HVAC system?
- Look at how it is running, not just how old it is. If your furnace or air conditioner needs repairs more winters than not, or if a repair would cost close to what a new system runs, replacement is usually the better move. Heat matters more here than cooling since homes need it from October through May, so a furnace on its last legs shouldn't be pushed through another 16°F winter night. A contractor can look at the specific unit and tell you if it's worth fixing again.
- Should I replace my furnace and air conditioner at the same time?
- If they are close in age, replacing them together often makes sense, but it depends on the condition of each one. A furnace and air conditioner installed years apart don't wear out on the same schedule, so it's common for one to still have life left when the other doesn't. Since homes here run the furnace eight months a year and the air conditioner only two, the furnace takes the harder workload and tends to show its age first. A contractor can check both and tell you honestly whether one or both need to go.
- What happens during an HVAC installation?
- A contractor removes the old furnace, air conditioner or heat pump and sets the new equipment in its place, then connects it to the ducts, gas line or refrigerant lines, and electrical as needed. They test the system to make sure it starts, runs, and shuts off the way it should, and check that it's sized right for the house. In most places this work needs a permit from the local building office and an inspection once it's done. New Hampshire has no state license for HVAC contractors, so it's worth asking about the contractor's experience and how they handle the permit and inspection before work starts.