AC Installation in Madison, MS
A new air conditioner in Madison will run from May through October every year. Tell us about the house, and a licensed contractor who covers Madison County will get in touch.
Tell us about the job
It takes about a minute.
Six months of Madison County heat, every year
Your air conditioner in Madison County runs from May through October, six months of the year. On afternoons that average 91°F, it has to hold that line for hours at a stretch, not just kick on and off.
A new unit installed here has to meet a federal minimum of 14.3 SEER2. That is the floor, not a guarantee, so whatever you install still has to run those six months without a break.
- 6 months
- May through October, your air conditioner is on duty
- 91°F
- the average summer afternoon it cools against
- 28 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 Madison 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 license is held by the contractor's business, not issued job by job, so the same license covers this installation and every other job that contractor takes on. It means the state has tested the contractor and keeps a record of who they are.
For an air conditioner install, that license is what stands behind the work. On top of it, most cities and counties in Mississippi require a permit for a new air conditioner and an inspection once it's in, which checks that the installation was done right regardless of who did it.
Source: Mississippi State Board of Contractors
- What size air conditioner does my house need?
- There is no fixed answer without a contractor measuring your house. Square footage matters, but so does how much insulation you have, how many windows face the sun, and how many rooms are upstairs versus down. An oversized unit cools the air fast but shuts off before it pulls the moisture out, so the house feels damp. An undersized one runs constantly and still can't keep up on a 91 degree afternoon, which is about what you can expect most summer days here. A contractor will do a load calculation on your specific house before recommending a size.
- Should I replace the whole system or just the outdoor unit?
- That depends on the age and condition of what you already have inside. The outdoor condenser and the indoor coil are matched to work together, and putting a new condenser on an old coil often means the system never runs at the efficiency it's rated for. If the indoor coil is old or was sized for a different outdoor unit, replacing just the outside piece can shorten the life of both. A contractor can check whether your existing coil and ductwork will work with a new condenser or whether the whole system needs to come out together.
- Do HVAC contractors in Madison 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 whoever installs your air conditioner. The license is tied to the contractor, not to each individual job. Beyond the state license, most cities and counties also require a permit for installing a new air conditioner, along with an inspection once the work is finished, so check that your contractor is pulling that permit as part of the job.