Rated 5.00 Stars on Google

Excellent AC Installer Services in Mt. Pleasant, SC

From fast repairs to energy-efficient upgrades, our expert team delivers professional HVAC, fireplace, and tankless water heater services for homes and businesses throughout the Lowcountry.
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Dependable HVAC Solutions in Mt. Pleasant, SC

As a trusted AC installer in Mt. Pleasant, SC, Four Seasons Heating & Air delivers professional, quality workmanship. Our technicians handle precise system sizing, energy-efficient replacements, ductwork sealing, and smart thermostat setups, ensuring every project meets our highest standards of excellence. We take pride in offering dependable service that keeps your indoor environment perfectly controlled.
An HVAC technician overseeing a tankless water heater installation.

Professional AC Repair You Can Trust

Is your cooling system blowing warm air, making strange noises, cycling constantly, or spiking your energy bills? We provide fast response times and transparent pricing on every service call, ensuring you know exactly what to expect. Learn more about our comprehensive options for professional AC repair tailored to restore your comfort quickly.

Our Customer Satisfaction Guarantee

Backed by our 100% satisfaction guarantee, our team stands firmly behind every diagnostic, fix, tune-up, and major installation we complete.

Ready to experience superior comfort? Contact us today to schedule an appointment with our expert technicians!

Expert Heating, Cooling & Gas Fireplace Services in Charleston, SC

Tankless Water Heater Service & Repair

Restore your home’s comfort with fast and dependable tankless water heater service. Our skilled tech...

Smart Thermostat Installation

Take control of your home's comfort and efficiency with professional smart thermostat installation. ...

Indoor Air Quality Solutions

Enhance your well-being and comfort with our expert indoor air quality solutions. We provide Charles...

HVAC Tune-Ups

Keep your heating and cooling system in top shape with professional HVAC tune-ups. Our expert techni...

HVAC Repair & Maintenance Services

Keep your home or business comfortable all year long with our trusted HVAC repair and maintenance se...

Gas Fireplace Servicing & Maintenance

Keep your home warm, safe, and inviting with professional gas fireplace servicing and maintenance fr...

Gas Fireplace Installation Services

Warm up your home and elevate your living space with our expert gas fireplace installation services....

Ductwork Repair & Replacement Services

Boost your home’s comfort and efficiency with expert ductwork repair and replacement. Mt Pleasant He...

Tankless Water Heater Installation Services

Upgrade your home’s comfort and efficiency with expert tankless water heater installation. Our exper...

HVAC System Installation Services In Mt. Pleasant, SC

Upgrade your comfort and efficiency with expert HVAC installation from Mt Pleasant Heating & Air. Ou...

Home Comfort Assessments

Achieve total comfort with our personalized Home Comfort Assessments. We evaluate your HVAC system, ...

Gas Log Set Sales & Installation

Enhance your home with the warmth and style of expertly installed gas log sets. Our team makes it ea...
What People Say

Customer Reviews

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angela profile picture
angela
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KC was a terrific technician. I watched him perform part of the time and he had talent, correct tools and the material he needed. He was also very helpful on advising on a couple of simple repairs that I wanted to tackle on my own. Four Seasons will be on our speed dial for future repairs. BTW, I sold a construction service business before retiring, so I know what quality and value are. Brett Cannady
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Joey Basha profile picture
Joey Basha
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Great job ! My house is nice and cool again.
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Nicholas Baker profile picture
Nicholas Baker
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I have been using Ken Smith and his team from Four Seasons HVAC for 8 years for both my property management business and my residence. Their pricing is fair and his team is professional. I will continue to call on Ken anytime I have a HVAC issue.
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Deryl Tourville profile picture
Deryl Tourville
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Several weeks ago, Four Seasons Heating and Air Conditioning repaired a unit for me but stated the coils were likely to fail. Yes, they did so the unit had to be replaced. Ken was provided a key and did the installation as promised. Would definitely use him again
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John Barnes profile picture
John Barnes
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The new fireplace from Four Seasons is perfect. Ken helped us design the project, and offered great options we had not considered. I was impressed by his crew's professionalism and craftsmanship. They did the job on time, and on price. No surprises. The fireplace works great, and we get lots of compliments.
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Brian Rea profile picture
Brian Rea
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Ken and his crew put in an amazing gas fireplace in our new home in just a few short days. The work was professional and they were extremely kind and courteous. We are so happy with the finished fireplace. The constructed a new wall in the room for the fireplace and installed ahandmade mantle that looks phenomenal. The carpentry and the painting was perfect, and they even rehung our TV for us above the fireplace.We couldn’t be happier with the quality of craftsmanship and the timely and professional installation. They have integrity in their work and they deliver as promised.
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mmaddden profile picture
mmaddden
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The service, professionalism, thoroughness by Ken and his crew has been unmatched. Our AC went out in the middle of summer and that same day (end of what I'm sure was a long work day for Ken), Ken popped over to examine what was going on. Said he and his guys could work to install a new unit in two days. I've been told nightmare scenarios that people have had to wait a week or more. Those guys worked their butts off the day they installed it; removing the old equipment, installing the new, putting a surge protector on it, etc. It felt like no stone was left unturned. Great local business to support. I'll be calling them again in a heartbeat.
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Debbie Smith profile picture
Debbie Smith
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Wonderful experience. Very professional. Love my A/C guys!!
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Whitney Lester profile picture
Whitney Lester
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Excellent service! Will be recommending this company to friends
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Allen Horrex profile picture
Allen Horrex
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I needed some help with a gas log, Ken graciously told me how to solve my problem, walked me though the steps and got my fireplace working again. Very knowledgeable and helpful, I will use them again when I need the services they provide!!
Our Service Area

Serving Mount Pleasant and The Surrounding Areas

Proudly serving Mount Pleasant, Charleston, Isle of Palms, Sullivan's Island, North Charleston, and the greater Lowcountry region.
Committed To Quality

Our Commitment to Quality

We use top-quality equipment and proven techniques, and every project is backed by our satisfaction guarantee. Your comfort and safety are our highest priorities.
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Experience Home Comfort Done Right

Don’t let comfort wait—call Mt Pleasant Heating & Air now to schedule service or request a free quote.

Frequently Asked Questions

We specialize in HVAC installation, repair, maintenance, and tune-ups; tankless water heater installation and service; gas fireplace installation and maintenance; ductwork solutions; indoor air quality improvements; and more.

Yes! We provide free, no-obligation estimates for all our services. Contact us to schedule your consultation.

We strive to respond quickly, often offering same-day or next-day emergency services for heating and cooling problems in the Charleston area.

We recommend scheduling professional maintenance at least once a year, ideally in early spring before the peak cooling season hits. Regular tune-ups help prevent unexpected breakdowns, keep your system running efficiently, lower your energy bills, and prolong the overall lifespan of your equipment.

You should call for assistance if your unit is blowing warm air, making strange noises, cycling too frequently, or causing sudden spikes in your monthly utility bills. Ignoring these minor warnings can lead to major component failures and more costly repairs down the road.

If your system is over ten to fifteen years old, requires frequent repairs, uses outdated refrigerant, or struggles to keep your home comfortable, replacing it is often the most cost-effective choice. A new, energy-efficient model will lower your power bills and provide more reliable long-term performance.

Before reaching out, check to make sure your thermostat is set to cool, the batteries are fresh, your air filter isn't completely clogged, and the circuit breaker hasn't tripped. If all of those components look good and your system still won't turn on, it's time to bring in our expert technicians.

Our experienced team works with a wide range of cooling setups, including traditional central air conditioning units, energy-efficient ductless mini-splits, heat pumps, zoned systems, and high-velocity units. We ensure your equipment is properly matched to the specific layout, size, insulation levels, and overall cooling demands of your home.

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Four Seasons Heating & Air
Don’t let comfort wait—call Mt Pleasant Heating & Air now to schedule service or request a free quote.

Monday – Friday: 9:00 AM – 5:00 PM
Saturday: Closed
Sunday: Closed

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