AC Installation in Raleigh, NC
A new air conditioner in Raleigh will run from May through September every year. Tell us about the house, and a licensed contractor who covers Wake County will get in touch.
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Five months of Raleigh heat, every year
Your air conditioner in Wake County works from May through September, with summer afternoons averaging 88°F. That is five straight months of long, steady runtime, not just a few hot weeks.
A new system installed here also has to meet the federal minimum of 14.3 SEER2, the efficiency rating that applies to central air conditioners built since 2023. Whatever gets installed will run under that standard and needs to be sized to handle a Raleigh summer, not just pass on paper.
- 5 months
- May through September, your air conditioner is on duty
- 88°F
- the average summer afternoon it cools against
- 122 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 $20 a year.
Estimates for a typical Wake County home, from EIA household energy data, North Carolina fuel prices and NOAA climate normals. Your home will differ.
North Carolina requires HVAC contractors to hold a state license.
The state board tests contractors before they can hold this license, and it keeps a record of who holds one. That license belongs to the contractor, not to any single job, so the same license that qualifies someone to install your air conditioner qualifies them for the next one too.
For an air conditioner installation, the license is what stands behind the person doing the work, but it is not the only check in Wake County. Most cities and counties here require a permit before a new air conditioner goes in, and an inspection once it is done, separate from anything the state board does. That inspection is what confirms the installation itself was done right.
Sources: North Carolina General Assembly · North Carolina State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors
- What size air conditioner does my house need?
- The right size comes from a load calculation, not a rule of thumb based on square footage. A contractor measures your windows, your insulation, your ceiling height, and which way your house faces, then runs those numbers through a formula called a Manual J. An oversized unit cools the air fast but shuts off before it pulls the humidity out, so the house feels clammy even at the right temperature. An undersized one runs constantly and still can't keep up on the hottest afternoons. Summer highs here average 88°F over the five months of cooling season, so getting the size right matters.
- Should I replace the whole system or just the outdoor unit?
- In most cases the outdoor unit and the indoor coil should be replaced together. The two are matched to work as a pair, and pairing a new outdoor unit with an old coil usually means losing the efficiency you're paying for, sometimes voiding the warranty too. If your indoor coil and ductwork are still in good shape and only a few years old, a contractor may be able to confirm they'll work with a new outdoor unit. If the system is old enough that the coil is likely near the end of its life anyway, replacing just the outdoor unit often ends up costing more down the road than doing both now.
- Do HVAC contractors in Raleigh need a state license to work on my home?
- Yes. North Carolina requires HVAC contractors to hold a state license, issued through the State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors. The license belongs to the contractor, not to any single job, so it's worth confirming before work starts rather than after. Installing an air conditioner also typically needs a permit from your local building office, with an inspection once the work is finished.