Air Conditioners in Mount Pleasant, SC

Mount Pleasant SC Air Conditioner Sales and Installation

AC units may look similar, but their Seasonal Energy Efficiency Rating (SEER) can vary widely. Higher SEER numbers save more money spent on electricity. A 13 SEER air conditioner, the Environmental Protection Agency’s “current minimum standard”, uses 23% less energy than a 10 SEER unit (EPA standard up until Jan. 2006). Even though 13 SEER is the minimum efficiency available, we currently offer a line of air conditioners that start at 13 SEER and go all the way up to 21 SEER. Depending on your average usage, higher SEER air conditioners can significantly reduce your electric bill.

Additionally, our South Carolina HVAC service professionals offer a complete line of air conditioners with advanced features, such as 2-stage compressors and variable-speed fan operation. These features not only improve the comfort level of your home but can also provide additional energy savings.

Installing advanced variable speed Carrier central air systems

Infinity® 21 Central Air Conditioner

Model Family: 24ANB1 Efficiency SEER: Up to 19 SEER Efficiency EER: Up to 15 EER Energy Star Rated: ENERGY STAR® Sound Level: As low as 65 DBA Refrigerant Type: Puron® Compressor: Two-stage scroll compressor Factory Warranty Parts: 10-year parts limited warranty when properly registered. Factory Warranty Compressor: 10-year compressor limited warranty when properly registered. Manufacturer’s Stated Benefits:

Self diagnostics.
Superior comfort and humidity control.
Infinity level advanced diagnostic intelligence
System protecting high and low pressure switches
Compressor sound blanket and Silencer System II™ design
WeatherArmor Ultra™ protection

Offering high efficiency Carrier Infinity series air conditioners

Infinity® 19vs Central Air Conditioner

Model Family: 24VNA9 Efficiency SEER: Up to 19 SEER Efficiency EER: Up to 12.5 EER Energy Star Rated: ENERGY STAR® Sound Level: As low as 56 DBA Refrigerant Type: Puron® Compressor: Variable, 5-stage compressor operation for ultimate comfort and quiet Factory Warranty Parts: 10-year parts limited warranty when properly registered. Factory Warranty Compressor: 10-year compressor limited warranty when properly registered. Manufacturer’s Stated Benefits:

Compressor sound blanket and Silencer System II™ design
Filter drier system protection from moisture and contaminants
Optimal humidity and temperature control when managed by the Infinity® Touch control
WeatherArmor Ultra™ protection

Delivering enhanced performance cooling with Carrier systems

Performance™ 16 Series Air Conditioner

Model Family: 24ACC6 Efficiency SEER: Up to 17 SEER Efficiency EER: Up to 13 EER Energy Star Rated: ENERGY STAR® Sound Level: As low as 72 DBA Refrigerant Type: Puron® Compressor: Single-stage scroll compressor Factory Warranty Parts: 10-year parts limited warranty when properly registered. Factory Warranty Compressor: 10-year compressor limited warranty when properly registered. Manufacturer’s Stated Benefits:

Protected by Carrier's WeatherArmorTM coil guard.
Filter drier system protection from moisture and contaminants
Compressor sound blanket

Providing dependable cooling with Carrier Comfort series units

Comfort™ 14 Central Air Conditioner

Model Family: 24ACC4 Efficiency SEER: 14 SEER Efficiency EER: Up to 12.2 EER Energy Star Rated: N/A Sound Level: As low as 72 DBA Refrigerant Type: Puron® Compressor: Single-stage scroll compressor Factory Warranty Parts: 10-year parts limited warranty when properly registered. Factory Warranty Compressor: 10-year compressor limited warranty when properly registered. Manufacturer’s Stated Benefits:

Filter drier system protection from moisture and contaminants
WeatherArmor™ protection
Recommended control: Carrier® Cor™ thermostat
Heavy-gauge, galvanized steel construction
Baked-on, durable powder coat paint
Wire coil guard

Air Conditioning FAQ

What size air conditioner do I need for my home?

The right size depends on your home’s square footage, insulation, layout, and cooling needs. A professional load calculation ensures the best fit for comfort and efficiency.

How often should my air conditioner be serviced?

Our licensed contractors recommend servicing your cooling system at least once a year—ideally before the cooling season—to keep it running efficiently and reliably.

How long does an air conditioner last?

Most modern air conditioners last 10–15 years with proper maintenance. Regular service can help extend that lifespan.

Will a new air conditioner lower my energy bills?

Newer systems are more energy-efficient than older models, so upgrading can lead to noticeable savings on utility costs.

What’s the difference between SEER ratings?

SEER (Seasonal Energy Efficiency Ratio) measures cooling efficiency. A higher SEER rating means better energy performance and potential cost savings.

Can I run my air conditioner with the windows open?

Running your AC with windows or doors open wastes energy and makes your HVAC system work harder, increasing wear and higher bills.

How do I improve indoor air quality with my air conditioner?

Running your AC with windows or doors open wastes energy and makes your HVAC system work harder, increasing wear and higher bills.Adding upgraded air filters, whole-home air purifiers, or humidity control options can help your AC system reduce dust, allergens, and pollutants.

What signs indicate my air conditioner needs repair?

Look for weak airflow, strange noises, warm air, frequent cycling, or rising energy bills. These can signal the need for service.

Is it better to repair or replace an old air conditioner?

If your heating and air conditioning system is over 10 years old and repairs are frequent or costly, replacement with a more efficient model is often the better long-term choice.

Do new air conditioners come with warranties?

Most new indoor comfort equipment includes manufacturer warranties on parts and compressors, and additional coverage may be available through service plans.

What Lowcountry Locals Have to Say

The installation crew was just spectacular especially in this heat. My house is now cool and comfortable! Thank you for taking such great care of me.

Damien and Nick are wonderful. They are experts in HVAC installation. The install of a new unit took about half the day and they were able to get me the exact brand/unit I wanted that matched my downstairs AC so I could use the same APP to regulate both. Great people, very kind and a wonderful company. Responsive and trustworthy too.

Dunes Heating and Air Conditioning, LLC Air Service technician Logan showed up on time and performed thorough inspection and service He was extremely polite and helpful. I would recommend Dunes Heating and Air Conditioning, LLC for anyone who needs AC replacement or service.

Values We Stand Behind

Why Dunes Heating and Air Conditioning?

Call us at (843) 480-2033 or fill out the form below to schedule a service!

Service Backed by Decades of Experience

Residential and commercial air conditioning systems are complex and expensive, so don’t risk your valuable equipment to inexperienced hands. At Dunes Heating and Air Conditioning, we offer exceptional service from highly qualified technicians. We have provided AC installation, repairs, and maintenance in the local area for more than 23 years. When you need your air conditioner repaired, preventative maintenance performed, or it is time for the old system to be replaced, we offer expert services for your unique needs with upfront pricing. In more than two decades in business, we have worked to stay abreast of all advances in our industry to bring our customers the highest quality products and service.

We offer Mount Pleasant air conditioning maintenance to help keep your system operating reliably and energy efficiently. Our technicians perform a thorough inspection, clean the system, and test all components to ensure that everything is working at optimal efficiency. Our maintenance program can help you avoid unexpected repairs in the middle of the summer.