An outdoor air conditioning condenser unit on a concrete pad next to the gray vinyl siding of a residential home.

AC Installation in Picayune, MS

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

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
An outdoor air conditioning condenser unit mounted on a concrete pad next to a blue-sided residential house at sunset.

Six months of Picayune summers ask a lot of a new system

From May through October your air conditioner is the machine standing between you and a house that averages 91°F outside. It runs across six months here, not just a few weeks in midsummer.

A new central air conditioner installed here has to meet a federal minimum of 14.3 SEER2, so the efficiency question is mostly settled before you choose a model. What is worth asking about is how it holds up outdoors, since Pearl River County has logged 34 damaging wind events and 13 hail storms over the past ten years, including hail up to 2 inches. The outdoor unit sits through all of that.

6 months
May through October, your air conditioner is on duty
91°F
the average summer afternoon it cools against
13 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 May through September.

NOAA nClimDiv, 1991–2020 normals

An outdoor air conditioning condenser unit installed beside the exterior wall of a blue vinyl-sided house at sunset.

A higher-efficiency unit would save about $30 a year to run in Pearl River County compared with a new unit at the federal minimum.

  • A higher-efficiency unit$450 a year
  • A new unit at the federal minimum, 14.3 SEER2$480 a year

Estimates for a typical Pearl River County home, from EIA household energy data, Mississippi fuel prices and NOAA climate normals. Your home will differ.

Mississippi requires HVAC contractors to hold a state license.

The state board tests contractors before they can hold this license, and the license belongs to the contractor rather than to any single job. That means the person doing the work in Pearl River County had to prove competency to the state at some point, and the state keeps a record of who they are.

For this job, that license is what stands behind the person doing the installation. Beyond it, most cities and counties also require a permit for an air conditioner installation, with an inspection once the work is finished, and Pearl River County is included in that.

Source: Mississippi State Board of 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 looks at your insulation, your windows, how many floors you have, and how much shade your house gets before landing on a number. With summer afternoons here averaging 91°F, getting this right matters more than usual, since an undersized unit will run constantly trying to catch up and an oversized one will cool the air fast without pulling out the humidity.
Should I replace the whole system or just the outdoor unit?
If your indoor coil and outdoor unit are different ages or different efficiency levels, replacing just the outdoor unit can cause problems. The two are matched at the factory to work together, and pairing an old coil with a new condenser often means the system never hits the efficiency it's rated for. A contractor can check whether your indoor coil is a match for a new outdoor unit, or whether the whole system needs to come out together.
Do HVAC contractors in Picayune need a state license to work on my home?
Yes. Mississippi requires HVAC contractors to hold a state license through the State Board of Contractors, and that covers installing an air conditioner. Beyond the state license, most cities and counties also require a permit from the local building office for a job like this, with an inspection once the work is done.