Ductless Mini Split Installation in Charleston, SC

Let 3 Generations of Our Family Serve Your Family

 Mini Split Installation

Professional Mini Split Installation From a Charleston Team With 40 Years of Experience

Carney & Son 72 Degrees is a local, family-owned HVAC company serving Charleston and the surrounding areas since 1984. If you’re adding comfort to a room addition, a sunroom, a converted garage, or planning to install a whole-home ductless system in Charleston, we’ll size and install the right equipment for your space. Appointments are scheduled within 24 hours. Our technicians are licensed, bonded, and insured, and we explain your pricing before any work begins.

Why Charleston Homeowners Choose Ductless Mini Splits

Ductless systems are useful for comfort challenges that traditional ducted HVAC may not address well:

  • Room additions, sunrooms, and finished basements without existing ductwork
  • Homes where running new ductwork is impractical or too expensive
  • Individual rooms that never reach the right temperature on a central system
  • Replacing window units with a quieter, cleaner, more efficient solution
  • Whole-home conditioning for older Charleston properties built without ductwork
  • Zoned comfort so different rooms can stay at different temperatures

What We Install: Single-Zone and Multi-Zone Systems

We install ductless mini splits from leading manufacturers and match the right configuration to your home:

  • Single-zone systems: one outdoor unit, one indoor air handler. Right for one room or area.
  • Multi-zone systems: one outdoor unit, multiple indoor handlers. Each zone can be set to its own temperature.
  • Wall-mounted units: the standard configuration for bedrooms, living areas, and offices
  • Ceiling cassette units: flush-mounted for a cleaner look in open-plan or commercial spaces
  • Floor-mounted units: suited to rooms with limited wall space or floor-to-ceiling windows

We install systems from Mitsubishi Electric, Daikin, LG, Fujitsu, and other major brands. Every installation includes smart thermostat setup when you want it.

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Professional AC Installation Crew

If you are ready to install a new air conditioner in your home or would like to discuss your options, we are ready to help. Our team of technicians is looking forward to helping you with AC replacement in Charleston. We can also help you choose the right type of unit for your home if you are uncertain which model is the best option.

What to Expect During Your Installation Appointment

  • Site Assessment: We visit your home, evaluate the layout, and confirm the best placement for indoor and outdoor units.
  • Recommendation: We size the system correctly for your space and confirm pricing before any work starts.
  • Installation Day: We run the refrigerant line set, mount the indoor unit or units, place the outdoor condensing unit, and complete all electrical connections.
  • System Start-Up: We charge the system, run a full operational test, and confirm the equipment is performing correctly.
  • Walk-Through: We show you how to operate the system and answer questions before we leave.

Mini Split Installation Cost and Estimate Expectations in Charleston

Costs vary based on the number of zones, the equipment brand and efficiency rating, and the complexity of the line set routing. We provide a written estimate before the project begins. Financing is available at 0% for 18 months through GreenSky.

What Affects Price

  • Single-zone versus multi-zone configuration
  • Equipment brand and SEER2 efficiency rating
  • Length and routing of the refrigerant line sets
  • Electrical panel capacity and any required panel upgrades
  • Permits and labor, when required, should be clearly included in the estimate.
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Appointments Scheduled Within 24 Hours

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Technician Seal of Safety

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0% Financing for 18 Months

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2-Year Labor Warranties

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Licensed & Insured Technicians

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100% Satisfaction Guaranteed

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BBB-Accredited Business with an A+ Rating

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HomeAdvisor Screened & Approved

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Over 40 Years of Experience

Charleston's Choice Winner 2025

Charleston Climate Considerations for Mini Split Repair

Coastal Humidity and Salt Air

Charleston’s salt air and humidity accelerate wear on refrigerant line connections, electrical components, and outdoor unit surfaces. Keeping coils clean and connections properly sealed is especially important in this climate.

Long Cooling Seasons

Mini-splits in Charleston often operate for long periods during the extended warm season. When annual maintenance is skipped, systems may develop refrigerant and drainage issues faster than they would in milder regions. A spring tune-up before peak heat arrives helps keep the system efficient when you need it most.

Schedule Mini Split Repair in Charleston Within 24 Hours 

When your ductless system isn’t keeping up, Carney and Son is ready to help. Call us at 843-867-2377 or request an appointment online, and we’ll schedule your visit within 24 hours. We provide upfront pricing before work begins, and we stand behind every repair with a 2-year labor warranty.

FAQ

How much does ductless mini split installation cost in Charleston?
Cost depends on the number of zones, equipment brand, SEER2 efficiency rating, and how complex the refrigerant line set routing is. Electrical panel upgrades and permits factor in as well. We provide a written estimate before any work starts so you know exactly what you're paying. Financing is available at 0% for 18 months through GreenSky.
How long does a mini split installation take?
Most single-zone installations are completed in one day. Multi-zone systems with several indoor handlers may take longer depending on the layout of your home. We'll give you a realistic timeline during your site assessment.
Do I need permits for a mini split installation in Charleston?
Permits and inspections may be required depending on your home and jurisdiction. We’ll help you understand what applies and make sure permit-related costs are clearly addressed in your estimate.
What's the difference between a single-zone and a multi-zone system?
A single-zone system pairs one outdoor unit with one indoor air handler, ideal for adding comfort to one room or area. A multi-zone system connects one outdoor unit to multiple indoor handlers, each controlling its own temperature independently. If you're conditioning several spaces or an entire home, a multi-zone system provides room-by-room control without the cost of running ductwork.
Will a ductless mini split work well in Charleston's humidity?
Ductless systems are a strong fit for Charleston's climate. They avoid the energy losses that come from ductwork running through hot attics and crawl spaces, which is a real efficiency drain in long, humid summers. In winter, heat pump mini splits operate efficiently well below freezing, far past what Charleston temperatures typically require.

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