AC Installation in Berlin, NH
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Berlin doesn't ask much of an air conditioner
Summer afternoons here average 73°F. That's mild, and it means a new air conditioner in Berlin will spend most of its time barely working.
A central air conditioner installed here still has to meet the federal minimum of 13.4 SEER2, same as anywhere else. With highs this low, getting the size right for your house matters more than chasing extra capacity you won't need.
- 73°F
- the average summer afternoon it cools against
- 25 hail events
- in ten years, and hail bends the fins on outdoor coils
- 13.4 SEER2
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
Going above the federal minimum saves little here, about $10 a year.
Estimates for a typical Coos County home, from EIA household energy data, New Hampshire fuel prices and NOAA climate normals. Your home will differ.
New Hampshire has no state license for HVAC contractors.
New Hampshire does not put any state record behind an HVAC contractor. There is no test, no license number, no state registration to check against. Whatever confidence you have in the person doing this job comes from somewhere other than a state file, because in New Hampshire that file does not exist.
For an air conditioner installation, the protection that does exist comes from the local building office. Most cities and counties in New Hampshire require a permit before the work starts and an inspection once it is done, and that inspection is what confirms the unit was put in correctly. Coos County's protection on this job is the permit and inspection, not a state license.
Source: New Hampshire General Court
- What size air conditioner does my house need?
- The right size depends on your square footage, your windows, your insulation and how many walls face the sun, so a contractor works this out with a load calculation rather than a rule of thumb. An oversized unit cools the air fast but shuts off before it pulls the moisture out, so the room feels damp. Berlin summer afternoons average 73°F, which is mild enough that an undersized system still keeps up most days, but the calculation is what tells you the actual number for your house.
- Should I replace the whole system or just the outdoor unit?
- If your indoor coil and outdoor unit were installed together and are the same age, replacing just the outdoor unit usually causes problems, since the old coil and the new unit are not matched for the same refrigerant charge or airflow. A contractor can check whether your coil is compatible with a new outdoor unit. If the system is old enough that the outdoor unit is failing, the indoor coil is often close behind it, so ask the contractor to look at both before deciding.
- Do HVAC contractors in Berlin need a state license to work on my home?
- No. New Hampshire has no state license or registration for HVAC contractors. That does not mean the job skips oversight, though. Installing an air conditioner here still needs a permit from the local building office, and an inspector checks the work when it is done.