Heat pump vs Furnace in Charleston County, South Carolina
When a heat pump makes sense
If you already heat with electricity, a heat pump keeps you on the same fuel and costs about 5% less to run than natural gas at South Carolina prices. Winter nights here average 41°F, mild enough that a standard heat pump holds its heating power through the season. It also cools your home in summer, so one machine covers both jobs.
When a furnace makes sense
If your home already has a gas line and gas furnace, there is little reason to switch on cost alone, since heating needs here only run about 5 months a year. A furnace will heat through any cold night without losing capacity, though you would still need separate equipment for cooling. It suits a home built around gas heat more than one starting from scratch.
When a heat pump makes sense
If you already heat with electricity, a heat pump keeps you on the same fuel and costs about 5% less to run than natural gas at South Carolina prices. Winter nights here average 41°F, mild enough that a standard heat pump holds its heating power through the season. It also cools your home in summer, so one machine covers both jobs.
When a furnace makes sense
If your home already has a gas line and gas furnace, there is little reason to switch on cost alone, since heating needs here only run about 5 months a year. A furnace will heat through any cold night without losing capacity, though you would still need separate equipment for cooling. It suits a home built around gas heat more than one starting from scratch.
Heat pump
- Runs on
- Electricity
- What it does
- Heats and cools
- Tax credit
- No federal tax credit since the end of 2025
Sources: U.S. Department of Energy · Internal Revenue Code
Furnace
- Runs on
- Natural gas
- What it does
- Heats only
- Tax credit
- No federal tax credit since the end of 2025
Sources: U.S. Department of Energy · Internal Revenue Code
Heat pump wins in Charleston County.
Winters here stay mild, rarely below 41°F at night, so a heat pump keeps up easily and most homes already run on electric heat anyway.
If your home already has a gas line and you would rather not add cooling equipment to the mix, a furnace still gets the job done.
Find a contractor| Compared on | Heat pump | Furnace |
|---|---|---|
| Cost to run here | About 5% less to run | Costs more to run |
| What it does | Heats and cools | Heats only |
| Homes in the South Atlantic states that heat with one | 30.1% | 48% |
| Handles a 41°F night | Standard models lose heating power in the cold; cold-climate models are built for it | Yes |
Sources: U.S. Energy Information Administration, U.S. Department of Energy, NOAA
When a heat pump makes sense
If you already heat with electricity, a heat pump keeps you on the same fuel and costs about 5% less to run than natural gas at South Carolina prices. Winter nights here average 41°F, mild enough that a standard heat pump holds its heating power through the season. It also cools your home in summer, so one machine covers both jobs.
When a furnace makes sense
If your home already has a gas line and gas furnace, there is little reason to switch on cost alone, since heating needs here only run about 5 months a year. A furnace will heat through any cold night without losing capacity, though you would still need separate equipment for cooling. It suits a home built around gas heat more than one starting from scratch.
A Charleston County contractor will price both against your own house, your ductwork and your panel.
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