5.0 ★★★★★ (99) Cox Climate Control

New Air Conditioning Installation in St. George

Correctly sized, energy-efficient systems, installed right the first time.

Need a new AC installed? You are in the right place.

Cox Climate Control handles AC installation in St. George and across Southern Utah. New home, room addition, first central system, or an upgrade for a growing house. We design it, size it, and install it right.
We serve homeowners, builders, property managers, and local businesses. Every install starts with real measurements, not guesswork.
If you are replacing an old unit that has quit on you, we have a dedicated page for that decision.

When Homeowners Call Us for a New Installation

Not every install is about a dying unit. Here is when people call us for something new:

That last one comes up a lot here. Big homes with one struggling system, and a bedroom that never cools down. Sometimes the answer is a second system. Sometimes it is a ductless mini split serving just that hot room.
We will tell you which one actually fits your house.

What Sets a Proper Installation Apart

Here is the truth about new AC systems. The install matters as much as the equipment.

A rushed install means years of high bills, hot rooms, and early breakdowns. We see it constantly, and the most common mistake in St. George is an undersized return. If the system cannot pull enough air through, it will never push enough cool air out.
A proper Cox installation covers all of it:

Then we clean up. Our rule is simple: leave it looking better than we found it.

We Design the System Around Your Home

A new installation is a design job first.

We run a Manual J load calculation to work out exactly how much cooling your home needs. For new ductwork, we use Manual D to design the airflow room by room. That is the engineering standard, and most companies skip it.
Why does it matter so much here? Because Southern Utah summers push a system hard for months. A well-designed system runs at the right pace, cools every room evenly, and lasts longer.
We recently designed a fix for a home with a master bedroom that was always warm. We upsized the return, went up half a ton, and added a duct to that room. The owners say they have never slept better.
That is what design gets you.

Choosing an Efficient System for the Desert

SEER2 is the efficiency rating on new systems. The higher the number, the less power it uses to cool your home.
Our honest advice: power is relatively cheap in Southern Utah, so a simple 13.4 SEER2 system is the right call for most homes.

Stepping up to a two-stage or variable speed system is about comfort, not payback. Longer, gentler runtimes pull more humidity out of the air and keep temperatures even. If that matters to you, it is worth it.
We are Trane dealers and Mitsubishi Diamond Dealers. Trane earns our recommendation because their coils have fewer weld joints, which means fewer refrigerant leaks over the years.
Rebates help too. Dixie Power pays $200 per ton, plus a smart thermostat rebate. We handle the paperwork with you.

Ductwork, Airflow and Comfort Add-Ons

Every new install is a chance to get the whole system right, not just the unit.
Common add-ons we handle:

And where ductwork is not practical, a ductless mini split cools the space without any ducts at all.

What a New AC Installation Costs

Straight numbers, because you deserve them. Most full system installations in Southern Utah run $9,500 to $15,000.
What moves the price? System size, efficiency level, whether we are building new ductwork or working with existing ducts, and any add-ons.
The real number comes from a free in-home quote. We measure, design, and put everything in writing. No surprise fees, ever.
Comparing bids from other companies? Get a free second quote from us before you decide.
And you do not have to pay it all at once. Financing is available through Wisetack, with 0% options on approved credit.

What to Expect on Install Day

Here is the process, start to finish:

Free In-Home Quote

We measure your home, run the load calculation, and design the system.

Honest Options.

Clear pricing on the choices that fit your house. You pick. No pressure.

Fast Scheduling

We move fast once you approve. Usually within a day.

Install Day

We set the equipment, handle ductwork and electrical, charge the system, and configure everything.

Test Under Load

We run the full system and verify airflow and cooling before we pack up.

Walkthrough

We show you the system and the thermostat, then leave the space spotless.

Follow Up

We check in afterward to make sure it is performing right.

WHAT OUR CUSTOMERS SAY

Here’s what our happy customers have to say

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Jennifer Gardner profile picture
Jennifer Gardner
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Quick, kind , got the job done fast, affordable and quick. No bs
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Robert McMillan profile picture
Robert McMillan
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Great experience. Honest and will definitely use them again and refer them to everyone. Willing to do the repair rather than try and sell us a whole new unit.
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Carlos Daniel Carneiro de Araujo (Daniel) profile picture
Carlos Daniel Carneiro de Araujo (Daniel)
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I had an excellent experience with Cox Climate Control! Ethan was professional, knowledgeable, and quickly diagnosed a serious issue with my air conditioner that had been causing me a lot of trouble. He fixed it much faster than I expected, and everything has been working perfectly ever since. I truly appreciate the honest service, fast response, and high-quality work. I highly recommend Cox Climate Control to anyone looking for reliable HVAC service. Thank you, Ethan!
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WR Edwards profile picture
WR Edwards
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Ethan came out in an Emergency call at Night when our a/c quit workingThe temperature was 109. He examined the a/c and found 1 condenser finished and compressor broken. He said he had 2 portable a/c units he could bring so we would not have to move my ill husband and I to a hotel. He came back with the units and set them up. to cool down our house. This was completed after 12 midnight. He said he would check on us the next day. This all happened on a Saturday night. Ethan said they could come back on Monday to discuss a new a/c at our request. He did return with a quote that we thought was fair and we organized to install the next day Tuesday. If you are looking to replace your A/C you could not find a more competent, caring, reliable Company. We highly recommend Cox Climate Control.
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Natalie Riley profile picture
Natalie Riley
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We recently had to replace our entire AC system and after lots of research, we chose Cox. We are so glad we did! Devin was patient as we explored many different options, drafted a few quotes for us, and answered all of our many questions. The team that came out to do the install was great as well! We felt very confident using Cox for such a big project.
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Sj Burt profile picture
Sj Burt
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They were very timely and charged a fair price.
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Dianna Walker profile picture
Dianna Walker
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Our AC unit randomly stopped working on a Sunday. It was July, during monsoons and things were pretty dire. (The chocolate chips in my pantry even melted!) Devin with Cox Climate Control answered the call and we had cool air that evening! He showed up, gave a great quote and didn’t pressure us to upgrade our unit. I cannot recommend them enough!
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Kevin Walker [Moapa Valley HS] profile picture
Kevin Walker [Moapa Valley HS]
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Cox Climate went above and beyond to take care of us in the middle of July! Tough to get service when you need it most. I was impressed about their competitive pricing and quick response! It’s refreshing to see companies that still value customers and taking care of the ‘little guy.’
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Lacey Brinkerhoff profile picture
Lacey Brinkerhoff
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Cox Climate Control is the ONLY way to go!!!! My AC went out in the middle of the night, so I called first thing in the morning. They had a technician at my house that afternoon, and my AC was repaired the same day. From the very first phone call to the final invoice, their communication was outstanding. They kept me informed every step of the way, were professional, friendly, and made the whole process stress-free. On top of that, their pricing was very reasonable. It’s hard to find companies that provide this level of customer service these days, and I wouldn’t hesitate to recommend Cox Climate Control to anyone needing HVAC service.
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Jordan Stone profile picture
Jordan Stone
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I had a great experience with these guys. The gentleman that came to my house and serviced our units were great to talk to, and super knowledgeable. Did a good job. Highly recommend.

Installing Across St. George and Nearby Towns

We install new AC systems throughout Southern Utah
Our trucks are fully stocked, so the farther towns get the same fast service as St. George.

Free Quote Callout

Planning a new AC install? Get a free in-home quote from Cox. Comparing companies? Smart. Bring us your other quote, and we will give you a free second opinion.

New AC Installation FAQs

We schedule fast, usually within a day of your approval. On install day, we set the equipment, handle the ductwork and electrical, and test everything under load before we leave.
Yes, we work with homeowners, builders, and property managers across Southern Utah. We design the system with Manual J and Manual D so it fits the home from day one.

Yes, we design and install new ductwork where the home allows it. Where ducts are not practical, a ductless mini-split cools the space with no ductwork at all.

The size your load calculation says, not a guess. Bigger is not better. We run a Manual J calculation on every install, so your system fits your home exactly.
Yes, and we are Mitsubishi Diamond Dealers. Mini-splits are perfect for garages, casitas, additions, and hot rooms that a central system cannot reach.
Most full installations run $9,500 to $15,000, depending on size, efficiency, and ductwork. Your free in-home quote gives you the exact number with no surprise fees.
We are Trane dealers and Mitsubishi Diamond Dealers. We recommend Trane for their superior coils with fewer weld joints, which means fewer refrigerant leaks over time.
Yes to both. Every quote is free, and financing runs through Wisetack with 0% options on approved credit. We also help you claim local rebates like Dixie Power's $200 per ton.

Ready to Install Your New System?

Let us build it right the first time.

Call Cox Climate Control at 435-862-3642 or request your free quote today. We will design a system your home deserves.

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