Replacing an AC Is a 15-Year Decision. Let's Get It Right.
A new air conditioner isn't a small purchase, and the system you pick will run hard for the next 12 to 15 years — March through October, nearly every day, in some of the most humid heat in the country. Get the sizing and the install right and you'll barely think about it. Get it wrong and you'll fight high bills, uneven cooling, and a clammy house the whole time.
That's the part most homeowners don't hear until it's too late: with AC, the installation matters as much as the equipment. GeauxHVAC does both parts right — we help you choose the correct system for your home, then install it clean and correct the first time.
You don't always need a new system. But it's usually time to replace when:
Your AC is 12 or more years old and starting to fail.
You're facing a major repair — a failed compressor or coil — that costs more than half the price of a new system.
You've got an older R-22 (Freon) system with a refrigerant leak. R-22 is phased out and expensive now, so you'd be pouring money into disappearing refrigerant.
You've called for repairs two or three times in one season.
Your energy bills keep climbing as an aging, low-efficiency unit works harder to keep up.
Still not sure which side of the line you're on? We wrote a full guide on exactly this: Repair or Replace? How to Know When Your AC Is Worth Fixing. And if the system just needs a fix, we'll tell you that — see our AC repair service instead. We're not here to sell you a system you don't need. If it just quit on you in the heat, our 24/7 emergency AC repair can get you cool while you weigh your options.
Why Correct Sizing Matters More Than You Think
Here's where a lot of AC installs go wrong, and why we don't just eyeball it.
A system that's too big cools the air fast, shuts off, and never runs long enough to pull the humidity out. In Louisiana, that's a real problem — you end up with a house that's cold and clammy, plus more wear from constant short-cycling. A system that's too small runs non-stop in July and still can't keep up.
We size every replacement to your actual home — square footage, insulation, ductwork, sun exposure, ceiling height — not a rule of thumb. Right-sizing is the single biggest factor in whether your new system is comfortable and efficient, and it costs you nothing extra to have it done correctly.
Understanding Efficiency (and What It's Worth Here)
New systems are rated by SEER2 — basically a miles-per-gallon for air conditioners. Higher SEER means lower running costs, and in a climate where your AC runs eight-plus months a year, that difference shows up on the Entergy bill every single month.
A higher-efficiency system costs more up front but earns some of that back in lower bills over its life. We'll lay out the honest trade-off for your home — where a premium high-efficiency unit pays off, and where a solid mid-tier system is the smarter buy. Not every home needs the top-of-the-line model, and we'll say so. And if you're cooling an addition, a converted garage, or one stubborn hot room, a ductless mini-split may be a better fit than a full central system — we'll tell you if it is.
One more thing worth knowing: the industry has moved to new A2L refrigerants (replacing R-410A), and our installs already use compliant, current-generation equipment. When you replace now, you're getting a system built to today's standard — not one that's about to be dated.
What to Expect From Your Installation
Free in-home assessment. We look at your current system, your ductwork, and your home, then size the replacement correctly.
Clear options and an upfront price. You'll see your choices and know the cost before anything's ordered — no surprises.
Clean, professional install. Most replacements are done in a single day. We protect your floors, haul off the old equipment, and leave the site clean.
We make sure it's right. We test the system, confirm it's cooling and dehumidifying correctly, and walk you through your new thermostat before we go.
To protect that investment, we recommend staying on top of routine maintenance — and our membership plan makes it easy to keep your new system running strong for years.
Why Homeowners Across Ascension Parish Choose GeauxHVAC
Right-sized installs — we don't guess, and we don't oversize to upsell.
Licensed, insured, and BBB-certified for residential and commercial work.
Local to Gonzales — we install for this exact climate every day.
Upfront pricing and free estimates — you approve the number first.
Clean, one-day installs with the old unit hauled away.
Cost depends on the size of the system, its efficiency rating, and the condition of your existing ductwork. Rather than guess, we give a free in-home estimate so you see real numbers for your home before you commit. You can also view our pricing for a starting point.
Most standard AC replacements are completed in a single day. If your ductwork needs repair or your install is more complex, we'll tell you up front how long it'll take.
That's exactly what a proper sizing assessment determines — it's based on your home's square footage, insulation, ductwork, and sun exposure, not a rule of thumb. Oversizing causes humidity problems in our climate, and undersizing can't keep up in summer, so we measure rather than estimate.
If your system is under about 8 years old and the repair is minor, repair usually wins. If it's 12+ years old, runs R-22 refrigerant, or needs a major part like the compressor, replacement is often the better investment. Our Repair or Replace guide breaks down the decision in detail.
