South Carolina HVAC Match
Aerial view of a square outdoor air conditioning condenser unit on a concrete pad beside a house wall with a sliding glass door.

AC Installation in Greenville, SC

A new air conditioner in Greenville will run from May through September every year. Tell us about the house, and a licensed contractor who covers Greenville County will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
Overhead view of a gray residential air conditioning condenser unit mounted on a concrete pad beside a house with asphalt shingle roofing.

Five months of Greenville summers ask a lot of a new AC

Your air conditioner runs May through September here, five months a year, with summer afternoons averaging 87°F. That is most of the warm season spent cycling on and off to hold the house at temperature, day after day.

Any new central air conditioner installed today has to meet a federal minimum of 14.3 SEER2. That baseline is set for homes that run their AC hard for a real stretch of the year, which is what Greenville summers do.

5 months
May through September, your air conditioner is on duty
87°F
the average summer afternoon it cools against
78 hail events
in ten years, and hail bends the fins on outdoor coils
13.4 SEER2
the federal minimum any new unit must meet
Isometric cutaway illustration of a small house showing interior rooms with furniture, ceiling ductwork and an air handler, plus an outdoor condenser unit connected by refrigerant lines beside the building.
Your air conditioner works hardest from June through August.

NOAA nClimDiv, 1991–2020 normals

Aerial view of a gray outdoor air conditioning condenser unit mounted on a concrete pad next to a house with vinyl siding.

Going above the federal minimum saves little here, about $10 a year.

  • A higher-efficiency unit$280 a year
  • A new unit at the federal minimum, 14.3 SEER2$290 a year

Estimates for a typical Greenville County home, from EIA household energy data, South Carolina fuel prices and NOAA climate normals. Your home will differ.

What size air conditioner does my house need?
The right size comes from a load calculation, not square footage alone. A contractor measures your windows, your insulation, and your ceiling height, then runs a Manual J calculation to find the tonnage your house actually needs. Going by square footage alone is how houses end up with a unit that's too big, which cools the air fast but never runs long enough to pull the humidity out. With summer afternoons here averaging 87°F, a system sized right will run longer, steadier cycles and hold up through those hot stretches.
Should I replace the whole system or just the outdoor unit?
In most cases you replace both together. The outdoor condenser and the indoor coil are matched to work at a specific efficiency, and pairing a new condenser with an old coil usually means losing the efficiency you paid for. It can void the warranty too. If your coil is old, replacing only the condenser can also mean higher failure risk down the line since the two parts wear at different rates. A contractor can inspect your coil and tell you whether it still matches well with a new condenser.
Do HVAC contractors in Greenville need a state license to work on my home?
Yes. HVAC contractors need a state license to install or work on your system. Ask to see the license number before any work starts, and check that it's active. A licensed contractor has passed a trade exam and carries the insurance required to cover mistakes or damage to your home.
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