Reach out to schedule ductless system installation or repair services with Dunes Heating and Air Conditioning.
We serve Mount Pleasant residents as well as the surrounding communities.
Duct-Free Heating and Cooling Systems
The cooling specialists at Dunes Heating and Air Conditioning in Mount Pleasant work hard to provide every customer in the area with an excellent selection of top-quality home comfort products and solutions. We are proud to offer customers from the Isle of Palms to Charleston a wide range of reliable ductless mini-split systems. We know this business inside and out, and serving South Carolinians is at the heart of everything we do.
Duct-free heating and cooling systems make the rooms or other small spaces in your home more comfortable. Remember, just like whole-home systems, the higher the SEER and HSPF ratings, the more efficient they will be. We offer a variety of through-the-wall packaged terminal air conditioners (PTACs) and duct-free heating and cooling systems to meet the needs of any individual room.
Issues You May Be Experiencing:
The result is higher utility bills and difficulty keeping the house comfortable, no matter how the thermostat is set. A well-designed, properly sealed ductless split system can make your home more comfortable, energy efficient, and safer. Contact us for a quote to seal your home's ducts and improve the performance of your heating and cooling systems.
Reach out to schedule ductless system installation or repair services with Dunes Heating and Air Conditioning, LLC.

The result is higher utility bills and difficulty keeping the house comfortable, no matter how the thermostat is set.

Model Family: NTXFKS Purpose: Heat & Cool Zone Capability: Single Efficiency SEER: Up to 28.2 SEER Efficiency EER: N/A Efficiency HSPF: Up to 13 HSPF Matching Outdoor Unit: Single-Zone: NTXFKS Matching Outdoor Unit: Multi-Zone: NTXMMX – NTXMPH Energy Star Rated: ENERGY STAR® certified Refrigerant Type: R410A Number of Fan Speeds: 5 fan speeds Sound Level: Quiet Operation Wireless Remote: Yes Factory Warranty Parts: 10-year parts limited warranty to the original purchasing owner upon timely registration; one (1) year parts limited warranty without registration. Manufacturer’s Stated Benefits:

Model Family: NTYWST Purpose: Cooling Zone Capability: Single & Multi-Zone Efficiency SEER: Up to 24.6 SEER Efficiency EER: N/A Efficiency HSPF: N/A Matching Outdoor Unit: Single-Zone: NTYSST Matching Outdoor Unit: Multi-Zone: N/A Energy Star Rated: ENERGY STAR® certified Refrigerant Type: R410A Number of Fan Speeds: 5 fan speeds Sound Level: As low as 19 dB(A) Wireless Remote: Yes Factory Warranty Parts: 10-year parts limited warranty to the original purchasing owner upon timely registration; one (1) year parts limited warranty without registration. Manufacturer’s Stated Benefits:

Model Family: NTXWST Purpose: Heat & Cool Zone Capability: Single & Multi-Zone Efficiency SEER: Up to 24.6 SEER Efficiency EER: N/A Efficiency HSPF: Up to 12.8 HSPF Matching Outdoor Unit: Single-Zone: NTXSST Matching Outdoor Unit: Multi-Zone: NTXMMX – NTXMPH Energy Star Rated: ENERGY STAR® certified Refrigerant Type: R410A Number of Fan Speeds: Vertical Air Swing Sound Level: Quiet Operation Wireless Remote: Yes Factory Warranty Parts: 10-year parts limited warranty to the original purchasing owner upon timely registration; one (1) year parts limited warranty without registration. Manufacturer’s Stated Benefits:
A ductless mini split is a heating and cooling system that provides climate control without traditional ductwork. It consists of an outdoor compressor/condenser and one or more indoor air-handling units. These units deliver conditioned air directly into individual zones or rooms.
A ductless mini split is a heating and cooling system that provides climate control without traditional ductwork. It consists of an outdoor compressor/condenser and one or more indoor air-handling units. These units deliver conditioned air directly into individual zones or rooms.
Mini splits use refrigerant to transfer heat between the indoor unit(s) and the outdoor compressor. In cooling mode, they remove heat from inside and release it outside, and in heating mode, they extract heat from outdoor air and bring it indoors.
Ductless mini splits offer several advantages, including:
Most mini splits function as heat pumps, providing both heating and cooling from a single system. This makes them a year-round solution for indoor comfort.
Ductless systems can heat or cool whole homes using multiple indoor units connected to a single outdoor compressor. For larger homes, multiple units may be needed to ensure consistent comfort.
Costs depend on system size, number of zones, and installation complexity. While upfront installation costs are typically higher than for a window unit or portable AC, the long-term energy savings and comfort improvements often justify the investment.
Regular maintenance—like cleaning or replacing filters and annual check-ups by an HVAC professional—keeps the system efficient, prolongs lifespan, and maintains warranty requirements.
Some common considerations include:
Choosing the right system depends on the size of your room(s), insulation levels, and how many zones you want. A professional assessment from the Dunes Heating and Air Conditioning, LLC team can help determine the ideal model and layout for your home or business.
Why Dunes Heating and Air Conditioning?
We serve Mount Pleasant residents as well as the surrounding communities.