HVAC Services in Charleston, SC

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Maintaining Your Residential HVAC System

If you are looking for an HVAC company that can provide you with affordable, reliable services, Carney & Son 72 Degrees is the team for the job. We are known throughout the local community for the quality of our work and the friendliness of our Charleston HVAC technicians.

With more than 30 years of experience, we know how to service, repair, install, and maintain virtually every type of HVAC equipment. From maintenance and minor repairs to complete new installation and replacements, you can count on us for it all.

To speak with a Charleston ​HVAC specialist from our team or to request a free quote, call us now.

Charleston, SC HVAC Services

We are pleased to provide you with a variety of HVAC services, including:

HVAC Installation

We specialize in precision HVAC installations in South Carolina. Our certified technicians are experts in installing virtually every type of heating, ventilation, and air conditioning system. From central air systems to innovative hybrid solutions, explore our diverse range of options to find the perfect fit for your needs.

Outdoor Condenser Unit Installation

What Is an Outdoor Condenser Unit?

Outdoor condenser units are required in many HVAC systems. They remove heat from indoors and send it outside.

Installation Process:

  • Location Selection: We start by choosing an easily accessible, level location with sufficient air clearance (at least 2 feet around and 4-6 feet above).
  • Mounting the Condenser Unit: We then secure the unit to a vibration-damping pad with anchor bolts to minimize noise and wear.
  • Connecting Electrical and Refrigerant Lines: Electrical connections should be handled by a certified electrician or HVAC technician and match the unit’s specifications. We’ll connect and insulate refrigerant lines and test for leaks.
  • System Testing: After we’re done installing the unit, we start it to check its operation, listen for irregular noises, and check for efficient output. All of our installations comply with safety standards and local codes.

Central Air and Heating Systems

What Are Central Air and Heating Systems?

Central air and heating systems are integrated heating and cooling systems that deliver air conditioning and heating from a single unit through a network of ducts. They’re a great choice for uniformly regulating the temperature in an entire home or building.

Central Air and Heating System Installation Process:

  1. Design and Assessment: Our technicians will assess your property and design a system that efficiently meets every room’s heating and cooling demands. If we’re replacing a pre-existing system, we can suggest an upgraded version of the system you already own.
  2. Unit Selection: Based on the size and layout of your property, we choose the optimal HVAC unit that balances performance with energy efficiency.
  3. Ductwork Installation: We install ductwork thoughtfully to ensure it delivers air efficiently throughout the property with minimal loss.
  4. Unit Installation: The central HVAC unit is strategically placed, typically alongside the building or on the roof.
  5. Testing and Commissioning: After installation, the system is thoroughly tested for performance and efficiency, and adjustments are made as needed.

Split Air Systems

What Are Split Air Systems?

Split air systems consist of two main components: an outdoor unit and an indoor unit, connected by refrigerant piping. They are best suited for cooling individual rooms or specific areas.

Installation Process:

  1. Site Survey: Each room’s dimensions and specific requirements are evaluated to determine the appropriate capacity and type of split system.
  2. Mounting the Indoor Unit: The indoor unit is mounted on a wall or ceiling where cooling is most needed, ensuring optimal air distribution.
  3. Installing the Outdoor Unit: The outdoor unit is placed in a location that minimizes noise and vibration in the indoor spaces.
  4. Connecting Refrigerant Lines: Refrigerant lines are run between the indoor and outdoor units, carefully sealed and insulated.
  5. System Testing: We test the system rigorously to ensure it operates efficiently and adjusts the settings for comfort.

Ductless Systems

What Are Ductless Systems?

Ductless or mini-split systems are similar to split air systems but do not require ductwork, making them ideal for older homes or extensions where duct installation is impractical.

Installation Process:

  1. Assessment: Our technicians evaluate the installation space and electrical setup to ensure compatibility with the ductless system requirements.
  2. Mounting Units: Both the indoor and outdoor units are mounted similarly to split systems, with careful consideration to aesthetics and functionality.
  3. Connection: Electrical and refrigerant connections are made between the indoor and outdoor units; all lines are securely insulated.
  4. Activation and Testing: The system is activated, checked for refrigerant leaks, and tested for operational efficiency.

Hybrid Systems

What Are Hybrid Systems?

Hybrid systems combine the benefits of a heat pump and a gas furnace to provide energy-efficient heating and cooling. The system switches between gas and electricity depending on the temperature to optimize comfort and efficiency.

Installation Process:

  1. Evaluation and Planning: A detailed evaluation to understand your specific needs, followed by a plan that considers both seasonal temperatures and utility costs.
  2. Installing Components: Both the heat pump and furnace units are installed and connected to existing ductwork (if applicable).
  3. Thermostat Integration: A smart thermostat is integrated to automate which heat source is used based on the temperature.
  4. Testing for Efficiency: Comprehensive tests ensure the system performs optimally under different conditions, and settings are adjusted for maximum efficiency.


What Are Furnaces?

Furnaces provide heating through natural gas, propane, or oil ignition. Blowers circulate the warmed air through the building’s duct systems.

Installation Process:

  1. Choosing the Right Furnace: Based on your home’s size and insulation, we determine the appropriate furnace size and type.
  2. Removal of Old Furnace: If needed, the old furnace is carefully removed and disposed of.
  3. Installation of New Furnace: The new furnace is installed, ensuring it is properly ventilated and the ductwork is correctly sealed.
  4. Testing: The furnace is tested to confirm it heats the home evenly and efficiently.

Forced Air Systems

What Are Forced Air Systems?

Forced air systems use a blower to push conditioned air through ductwork and into the spaces of a home. They can incorporate heating, cooling, or both.

Installation Process:

  1. System Design: We start by designing the system to include efficient routes for ductwork and optimal placement of the air handler.
  2. Ductwork Installation: Our technicians install and seal ductwork to minimize energy loss.
  3. Unit Installation: The central unit, either a furnace or heat pump, is installed and connected to the ductwork.
  4. System Check: The last thing we do is perform a complete system check to ensure all components work.


HVAC Repair

Broken Down AC or Heating Unit?

Throughout the year, we can experience fairly extreme temperature swings as the seasons change. Because of this, you rely on your HVAC system to stay consistent all year and keep you and your family comfortable. When something goes wrong and your system breaks or is acting strange, it is time to call on a Charleston HVAC specialist from Carney & Son 72 Degrees. Our family owned and operated company is dedicated to helping you quickly diagnose the problem and provide you with an affordable solution.

Restoring Indoor Comfort & Air Quality

Your AC system should never go down in the middle of summer when you need it most, just as you hope that your heating system will keep working throughout winter. However, HVAC equipment is unpredictable and you can never know when something will break down unexpectedly. It’s vital that you have a reliable and licensed Charleston HVAC repair company you can count on when you need it the most. We are here to help restore your comfort by fixing your heating or AC system as quickly as possible.

Thorough Inspections & Diagnostics

It can be difficult to determine what is wrong with your system without training and experience in the HVAC field. Fortunately, our company is licensed, bonded, insured, and we ensure all of our employees are constantly being trained on advances in HVAC technology. When you call us to tell us your system isn’t working right, our first step is to inspect your system and figure out exactly what is happening.

HVAC Maintenance

Enhancing Your Indoor Comfort Level

At Carney & Son 72 Degrees, our top priority is to keep your HVAC system in working condition all year long. While we do offer repair, replacement, and installation services, HVAC maintenance service is also one of our specialties. By taking measures to have your system inspected and serviced on a regular basis is a key step to keeping it in peak condition. Our HVAC specialists based are trained to maintain virtually any make and model of heating and air conditioning equipment in Charleston and surrounding areas.

What Does HVAC Maintenance Service Entail?

The main purpose of regular HVAC maintenance or service is to ensure all of the components are clean and working properly. Each time we come to your house for service, we take the time to thoroughly inspect your unit before we begin. With our 30+ years of experience, we know exactly what it takes to get an HVAC system in prime condition through tuning, cleaning, and minor repairs.

HVAC service may include the following steps:

>Testing for carbon monoxide leaks

>Cleaning blower motor

>Cleaning condenser and evaporator coil

>Inspecting filtration system

>Checking combustion and flue draft

>Cleaning burner and ignition

>Inspecting vent piping and humidification

HVAC Maintenance before and after

Before/After Image Gallery

Condenser and Stand Replacement

Evaporator Coil Cleaning

Blower Wheel Cleaning

Maintain Your System with Regular Service

A highly underrated service that HVAC technicians provide is regular maintenance. Your HVAC systems require a certain amount of cleaning and service to keep working year round. When you fail to maintain your system properly, it can lead to a variety of problems. Additionally, regular maintenance allows an expert from our team to spot small issues before they develop and cause more damage.

Schedule HVAC Service Today

At Carney & Son 72 Degrees, we are licensed, bonded, insured, and our technicians are extremely respectful. When we show up for any job, we are courteous, clean, and get the job done in a timely manner. Whether something has gone wrong and you need repair services or you simply have concerns about indoor air quality or maintenance, we are only a phone call away. We would be happy to discuss your needs in detail with you.

We’ve Been Doing this Since 1984

Our Team Stands by Our Work 100%

Reasons to Call:

1. Abnormally High Electricity Bill
2. Auxiliary Light
3. Unit Runs Continuously

4. Low Air Flow
5. Ice Buildup
6. High Humidity

Why Choose Us?


Appointments Scheduled Within 24 Hours


Technician Seal of Safety


0% Financing for 18 Months


2-Year Labor Warranties


Licensed & Insured Technicians


100% Satisfaction Guaranteed


BBB-Accredited Business with an A+ Rating


HomeAdvisor Screened & Approved


Over 40 Years of Experience