Furnace Replacement in Charleston, SC

Straightforward Furnace Replacement From a Local Charleston Team
Carney & Son 72 Degrees is a family-owned heating and air company serving Charleston and the surrounding areas since 1984. If your furnace is near the end of its lifespan, breaking down repeatedly, or causing higher energy bills, we’ll walk you through your replacement options and schedule your appointment within 24 hours.
Our technicians are licensed, bonded, and insured. We explain your pricing before work begins, and we stand behind every installation with a 2-year labor warranty. Replacing a furnace in Charleston is straightforward when you’re working with a team that knows local homes, local codes, and what the coastal climate does to HVAC equipment over time.
When Furnace Replacement Makes More Sense Than Repair
Some furnaces are worth fixing. Others have reached the point where putting more money in doesn’t make sense. Here are the situations where a new furnace is usually the better call:
- The system is 15 to 20 years old and breaking down more than once per season
- Repair costs are approaching 50% of what a new unit would cost
- Your energy bills have climbed steadily without a clear explanation
- The heat exchanger is cracked (a carbon monoxide safety concern)
- The system can’t maintain consistent temperatures throughout the house
- You’re moving from an older low-efficiency unit to a high-efficiency model
Furnace Systems and Equipment We Install in Charleston
We install gas and electric furnaces sized correctly for your home:
- Gas furnaces from 80% AFUE entry-level units through 96%+ AFUE high-efficiency models
- Electric furnaces for homes without gas service
- Two-stage and variable-speed equipment for more precise comfort control
- Compatible smart thermostat connections (Honeywell, Ecobee, Nest)
- Integration with existing zoning systems when your home’s layout requires it
Proper sizing matters. An oversized furnace short-cycles and wears out faster. An undersized one runs constantly and still may not heat your home effectively. We assess your current equipment, comfort concerns, home layout, and sizing needs before recommending equipment.
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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 a Furnace Replacement Appointment
- Scheduling: Confirmed within 24 hours. Your tech arrives on time and in uniform.
- Assessment: We inspect the existing unit, review your home’s comfort needs and layout, perform a load calculation when needed, and check ductwork compatibility.
- Recommendation: We present your equipment options with written pricing before any work starts.
- Installation: Old unit out, new unit in. We test the system thoroughly and clean up before leaving.
- Walk-Through: We show you how the new equipment works and answer any questions before we go.
Furnace Replacement Cost and Estimate Expectations in Charleston
Replacement costs vary based on equipment type, efficiency rating, and any required ductwork or gas line modifications. We provide a written estimate before the project begins. Financing is available at 0% for 18 months through GreenSky.
What Affects Price
- Fuel type: gas versus electric
- Efficiency tier: 80% AFUE versus 96%+ AFUE
- Single-stage, two-stage, or variable-speed equipment
- Ductwork modifications or new connections required
- Permits and inspections (we handle the permitting process)
How to Avoid Surprise Costs
Ask us to walk through the estimate line by line before we begin. If ductwork or gas line work is part of the job, we’ll identify that upfront so you know what to expect.
Maintenance and Preferred Comfort Club Benefits
Protecting a new furnace starts with regular maintenance. Preferred Comfort Club members at $19.95 per month receive:
- Two seasonal system evaluations per year, with one condensing coil washing and one condensate drain clearing included
- Discounted service fees
- Repair discounts listed in our straightforward pricing guide
- 5% off future system replacements and upgrades


Charleston Furnace Installation: Local Factors Worth Knowing
Coastal Humidity and Corrosion
Charleston’s humidity and salt air are harder on HVAC equipment than most inland climates. We select equipment rated for these conditions and install it in a way that minimizes long-term corrosion exposure.
Crawl Spaces and Older Homes
Many Charleston-area homes have elevated crawl spaces or older ductwork that needs to be assessed before a new furnace goes in. We handle that evaluation as part of the installation process, not as an afterthought.
Permits and Inspections
Furnace replacements in South Carolina require permits and inspections. We manage the permitting process from start to finish so you stay code-compliant without the paperwork.
Schedule Your Furnace Replacement in Charleston Within 24 Hours
When it’s time to replace your furnace, Carney and Son is ready to help. Request an appointment online, and we’ll schedule your consultation within 24 hours. We provide upfront pricing before work begins. We stand behind every installation with a 2-year labor warranty, and manufacturer warranty coverage may apply depending on the equipment.
FAQ
How do I know if my furnace needs to be replaced instead of repaired?
How much does furnace replacement cost in Charleston?
How long does installation take?
Do you handle permits and inspections?
Does Charleston's coastal climate affect furnace selection?
Areas We Serve:
- Charleston, SC
- Goose Creek, SC
- James Island, SC
- Johns Island, SC
- Kiawah Island, SC
- Mount Pleasant, SC
- North Charleston, SC
- Seabrook Island, SC
- Sullivan’s Island, SC
- Summerville, SC

