October 13, 2026
Heat Pump vs Furnace: Which Is Right for a South Carolina Home?
Updated November 12, 2026. Evans Heating & Cooling, heating and air conditioning service in Elgin, SC.
Direct Answer
Heat pump vs furnace in South Carolina depends on fuel and efficiency tier. On state energy prices, a federal-minimum heat pump and a standard 80% gas furnace cost about $20 per million British thermal units (BTU) of heat, a 95% furnace about $17, a high-efficiency heat pump about $15, and an electric furnace about $44.
TL;DR
- On South Carolina prices, a minimum heat pump and an 80% gas furnace cost about the same per unit of heat.
- A 95% condensing furnace beats a minimum heat pump, and a high-efficiency heat pump beats them both.
- The U.S. Department of Energy (DOE) says heat pumps easily cut electricity use by 50% compared with electric resistance heat, which is what an electric furnace uses.
- Columbia sees about 93 hours a year below 25°F, so backup heat runs for a small share of the winter.
- Dual fuel pairs a heat pump with a gas furnace that takes over when it’s too cold for the heat pump.
- The 25C federal tax credit can’t be claimed for equipment placed in service after December 31, 2025.
- Dominion Energy South Carolina pays $650 when an ENERGY STAR heat pump replaces an electric furnace.
One liner: Check your fuel and what heats the house now, get a load calculation sized to Columbia’s 24°F design temperature, then compare efficiency tiers.
Key Numbers
| Stat | What it measures | Source |
|---|---|---|
| 15.12 cents per kilowatt-hour (kWh) | South Carolina residential electricity price | U.S. Energy Information Administration (EIA), 2025 |
| $16.91 per thousand cubic feet | South Carolina residential natural gas price | EIA, 2024 |
| About $20 per million BTU | Heat cost, heat pump at the federal minimum of 7.5 heating seasonal performance factor 2 (HSPF2) | Calculated from EIA |
| About $20 per million BTU | Heat cost, gas furnace at 80% annual fuel utilization efficiency (AFUE) | Calculated from EIA |
| About $17 per million BTU | Heat cost, 95% gas furnace | Calculated from EIA |
| About $15 per million BTU | Heat cost, 10 HSPF2 heat pump | Calculated from EIA |
| About $44 per million BTU | Heat cost, electric furnace | Calculated from EIA |
| 50% | Heat pump power savings vs resistance heat | DOE |
| 14.3 SEER2, 7.5 HSPF2 | Federal minimum, split heat pump, cooling and heating ratings (seasonal energy efficiency ratio 2, SEER2) | DOE, January 1, 2023 |
| 24°F | Columbia 99% heating design temperature | National Oceanic and Atmospheric Administration (NOAA), 1973 to 1996 |
| About 93 | Hours a year below 25°F, Columbia | NOAA, 1973 to 1996 |
| $650 | Dominion electric furnace to heat pump rebate | Dominion Energy South Carolina, 2026 |
Heat Pump vs Furnace: The Short Answer for South Carolina Homes
In short: Whether your home has natural gas, and what heats it now, decides most of this choice.
Heat pump vs furnace in South Carolina comes down to fuel and efficiency. At state average energy prices, a minimum-efficiency heat pump and a standard 80% gas furnace cost about the same per unit of heat, and the heat pump also cools your home. An electric furnace costs roughly twice as much to run.
Here’s the quick number. Using U.S. Energy Information Administration (EIA) prices for South Carolina, heat from a heat pump built to the federal minimum works out to about $20 per million British thermal units (BTU). An electric furnace comes to about $44. Past that, three things decide it: whether you have natural gas service, the efficiency rating you buy, and what’s in the house now.
Cost to Run a Heat Pump vs Gas Furnace in South Carolina
In short: On South Carolina prices, the efficiency tier you buy decides whether gas or a heat pump costs less to run. An electric furnace costs the most.
On South Carolina’s own prices, the least efficient gas furnace doesn’t beat the most efficient heat pump. A heat pump built to the federal minimum and a standard 80% gas furnace come out within a few cents of each other per million BTU of heat. That cuts against a widely shared American Gas Association (AGA) analysis, which says the least efficient gas furnace is cheaper to heat with than the most efficient heat pump “in 36 states.” Its text doesn’t say which states.
Here’s the heat pump vs gas furnace cost per million BTU of heat, system by system. Heat pumps are rated by heating seasonal performance factor 2 (HSPF2) and furnaces by annual fuel utilization efficiency (AFUE).
| System | Efficiency used | Cost per million BTU of heat |
|---|---|---|
| Heat pump, federal minimum | 7.5 HSPF2 | About $20 |
| Heat pump, high efficiency | 10 HSPF2 | About $15 |
| Gas furnace, standard | 80% AFUE | About $20 |
| Gas furnace, condensing | 95% AFUE | About $17 |
| Electric furnace | 100% | About $44 |
So the heat pump vs gas furnace efficiency question has a tiered answer in South Carolina. A 95% condensing furnace beats a minimum heat pump by about $3 per million BTU. Step up to a 10 HSPF2 heat pump and it undercuts that furnace by about $2. And for every $100 an electric furnace spends on heat, a minimum heat pump spends about $45.
Here’s how those heat pump vs gas furnace operating costs were figured. EIA puts South Carolina’s 2025 residential electricity price at 15.12 cents per kilowatt-hour (kWh), and its 2024 residential gas price, the latest full year, at $16.91 per thousand cubic feet. EIA converts gas at about 1,037 BTU per cubic foot. AFUE is the share of the gas that ends up as heat in the house. HSPF2 is BTU of heat per watt-hour of electricity. The Department of Energy (DOE) gives an easy way to picture it: a 10.3 HSPF heat pump delivers 10,300 BTU for every kWh, while a resistance heating element delivers about 3,400. The 7.5 HSPF2 figure is the federal minimum for split heat pumps made since January 1, 2023.
Three limits apply. These are energy costs only, so a gas account’s monthly customer charge comes on top. HSPF2 is a rated figure from a standard test, and your ducts and the weather shape what you actually get. And your utility’s rate replaces the state average, so keep a recent bill handy when you compare quotes.
What Is a Heat Pump vs Furnace?
In short: A furnace makes heat by burning gas or running electric elements. A heat pump moves heat from outdoor air into the house, and runs in reverse to cool.
A furnace makes heat. A gas furnace burns natural gas and passes the heat through a heat exchanger, and a blower pushes the warm air through your ducts. An electric furnace blows air over a stack of three to seven resistance elements, each typically rated at 5 kilowatts, the DOE says. Either kind only heats, so a furnace home needs a separate air conditioner (AC) for summer.
A heat pump moves heat instead of making it. Think of a refrigerator, which pulls heat out of the box and lets it out into the kitchen. A heat pump does that job for your house, and unlike a fridge it can reverse its cycle to heat or cool. In winter it pulls heat from outdoor air, even cold air, and brings it inside. That’s how a properly installed air-source heat pump can deliver two to four times more heat energy than the electricity it uses. For the coldest hours, most systems carry backup heat, such as electric strip heaters.
Heat pumps carry two ratings: HSPF2 for heating and seasonal energy efficiency ratio 2 (SEER2) for cooling.
| Feature | Heat pump | Gas furnace | Electric furnace |
|---|---|---|---|
| How it heats | Moves heat in from outdoor air | Burns natural gas | Blows air over resistance elements |
| Fuel | Electricity | Natural gas | Electricity |
| Cools too? | Yes | No | No |
| Efficiency rating | HSPF2 for heat, SEER2 for cooling | AFUE | 100% of the power becomes heat |
| Needs a separate AC? | No | Yes | Yes |
Gas Furnace vs Heat Pump: Pros and Cons
In short: A gas furnace gives hotter air, full output in any cold snap and a longer life. A heat pump also cools, needs no gas line, and at the right efficiency tier matches or beats gas on running cost.
If your home has natural gas service, the heat pump vs natural gas furnace decision is the real one. Here are the pros and cons of heat pump vs gas furnace systems, factor by factor.
| Factor | Gas furnace | Heat pump |
|---|---|---|
| Running cost in South Carolina | About even with a heat pump at standard efficiency. A 95% model pulls ahead of a minimum heat pump | Matches an 80% furnace at the federal minimum. A 10 HSPF2 model beats a 95% furnace |
| Cooling | Needs a separate AC | Built in |
| Output on the coldest days | Burns fuel for heat whatever the outdoor temperature | Can struggle when it stays below freezing, so backup heat steps in |
| Heat feel | Hot, drier air from the registers | Cooler air, gentler flow, less drying |
| Lifespan | 20 years or more with proper maintenance | About 15 years, like an AC |
| Upfront cost | Lower for the furnace by itself | Higher than a furnace by itself, but it also does the AC’s job |
| Gas and safety | Needs gas service, a vent and carbon monoxide alarms | No burning fuel in the house |
Picture the same January morning in Elgin with each system. With a gas furnace, hot air pushes out of the registers and the house warms fast. With a heat pump, the air at the register feels cooler and the flow is gentler, and it doesn’t dry the air the way burning fuel does, Trane notes.
Gas tends to come out ahead when the house already has gas service and you’d buy a 95% condensing furnace. The electric heat pump vs gas furnace math tips the other way when there’s no gas line, since Trane notes that adding gas and a furnace plus AC can cost more than a heat pump system. It also tips that way when your air conditioner is due for replacement anyway.
Any gas furnace needs working carbon monoxide (CO) alarms. The Consumer Product Safety Commission (CPSC) calls for one on every level of the home and outside sleeping areas. Our fall heat pump and furnace checklist covers the alarm check and the furnace tune up.
Heat Pump vs Electric Furnace in South Carolina
In short: Both run on electricity, but the DOE says a heat pump easily cuts heating power use by 50%. Dominion Energy South Carolina pays $650 to make the switch.
Electric furnace vs heat pump sounds like a close match, since both run on the same power. The difference is in what each one does with it. The DOE calls electric resistance heat 100% efficient, because all of the power turns into heat. A heat pump moves heat in from outside, and the DOE says heat pumps “easily cut electricity use by 50%” compared with resistance heating.
Electric furnaces also lose ground in the ducts. The DOE says they cost more to run than other electric resistance systems because of duct heat losses and the extra energy it takes to move heated air through the house.
Picture a house built with an electric furnace and a separate air conditioner. When both near the end of their life, one heat pump can take over both jobs. It still carries electric heat strips, the same kind of heat the old furnace made, but they only run as backup for the coldest hours.
If Dominion Energy South Carolina supplies your electricity, the utility pays a rebate for this exact swap.
| Rebate rule | What Dominion Energy South Carolina requires |
|---|---|
| Amount | $650 |
| Who qualifies | Dominion Energy South Carolina electric residential customers |
| What qualifies | A new ENERGY STAR qualified heat pump replacing an older all-electric furnace that heats only with electric heat strips |
| Not eligible | Fuel switching, or a heat pump that doesn’t replace an electric furnace |
| Installer | A licensed mechanical contractor, no do-it-yourself installs |
| Deadline | Application and detailed invoice within 90 days of installation |
Customers whose power comes from an electric cooperative don’t qualify, even if Dominion supplies their gas.
Do Heat Pumps Work in a South Carolina Winter?
In short: Yes, for nearly all of it. Columbia’s records show about 93 hours a year below 25°F, roughly 1% of the year, and backup heat covers those hours.
Midlands winters are mild, and the weather records back that up. Data from the National Oceanic and Atmospheric Administration (NOAA) for nearby Columbia, published by its National Centers for Environmental Information (NCEI), puts the 99% heating design temperature at 24°F. On average, only about 93 hours a year fall below 25°F, and about 27 fall below 20°F, based on records from 1973 to 1996. That’s roughly 1% of the 8,760 hours in a year.
Heat pumps hold up well in that range. A Trane heat pump expert says variable-speed models deliver 100% of their heating capacity down to around 27°F and 70% down to about 5°F. Trane also calls heat pumps “great for mild climates where winter temperatures average around 30-40 degrees F”.
On those few colder hours, the backup heat strips switch on automatically, and the thermostat may show auxiliary heat (AUX). Light frost on the outdoor coil is normal too, and the defrost cycle clears it. Emergency heat is a different thing, a setting you switch on by hand when the heat pump itself has a problem. Here’s what emergency heat does and when to use it.
The design temperature matters again at quote time. The ENERGY STAR guide for load calculations tells designers to use the 99% heating design temperature for the closest weather location. Around Elgin, Columbia’s 24°F is that reference point, and it’s the number a properly sized heat pump or furnace is built around.
Dual Fuel: When to Use a Heat Pump vs Furnace in One System
In short: Dual fuel pairs a heat pump with a gas furnace. The heat pump runs most of the time, and the furnace takes over automatically when it’s too cold for the heat pump to run efficiently.
You don’t have to pick one. A dual fuel system, also called hybrid heat, puts a heat pump and a gas furnace on one thermostat. The heat pump heats the house until outdoor temperatures drop far enough that it becomes less efficient, and then the furnace takes over automatically. When it warms up, the heat pump takes the job back.
It works a lot like a hybrid car: electric for the easy miles, gas for the hard ones. Trane puts the switchover around freezing for a standard heat pump, and in the single digits or below zero for a cold-climate model. South Carolina’s running costs for the two fuels land close together, so ask how the switchover will be set when you compare quotes.
Dual fuel fits best when the house already has gas service and a sound furnace, but the air conditioner is due. The heat pump replaces the AC, and the furnace becomes the backup in place of electric strips. A Trane product manager puts it plainly: “Our advice is to install a heat pump even when installing a gas furnace”. The trade-off is upfront cost, since you’re paying for two heat sources.
Heat Pump vs Furnace and AC: Upfront Cost and Upkeep
In short: Compare a heat pump against a furnace plus an air conditioner, since one heat pump does both jobs. No federal tax credit applies to 2026 installs, and both setups need two service visits a year.
Heat pump vs furnace cost looks lopsided at first. Trane says a heat pump costs more up front than a furnace. But a furnace only heats, so the fair match is heat pump vs AC and furnace, one piece of equipment against two. If your air conditioner is near the end of its life too, that changes the math. For South Carolina price ranges by system type, see heating and cooling replacement costs in South Carolina. Trane also notes that a home not wired for a heat pump’s supplemental heat may need electrical work, so ask whether a quote includes it.
One thing has changed since many cost guides were written. The federal energy efficient home improvement credit, known as 25C, can’t be claimed for equipment placed in service after December 31, 2025, the Internal Revenue Service (IRS) says. A heat pump installed in 2026 doesn’t qualify. Utility rebates still apply, like the Dominion Energy South Carolina rebate covered above, and we offer financing options for the rest.
Upkeep comes out about even. A heat pump heats and cools, so it gets a service visit in spring and another in fall. A furnace and AC add up to the same two visits, since ENERGY STAR’s schedule checks cooling in the spring and heating in the fall. Trane also calls for a dealer checkup on a heat pump twice a year.
| Setup | Service visits a year | When |
|---|---|---|
| Heat pump | 2 | Spring and fall |
| Gas furnace plus AC | 2 | AC in spring, furnace in fall |
| Dual fuel | 2 | Spring and fall |
Heat Pump vs Furnace: Which One Is Better for Your Home?
In short: It depends on what’s in the house now. Gas homes with an AC that’s due often fit dual fuel, all-electric homes fit a heat pump, and every option starts with a load calculation.
There’s no single winner for every house. Find the row that matches yours.
| Your home now | What usually fits | Why |
|---|---|---|
| Natural gas, a sound furnace and an AC that’s due | A heat pump in place of the AC, set up as dual fuel | The heat pump handles most hours and the furnace covers the coldest ones |
| Natural gas, with the furnace and AC both due | A 95% condensing furnace with a new AC, or dual fuel | A 95% furnace runs cheaper than a minimum heat pump on South Carolina prices, and dual fuel adds the heat pump for milder days |
| All electric, with an electric furnace | A heat pump | It cuts electric heating use sharply, and Dominion Energy South Carolina offers a rebate for this swap |
| An older heat pump near the end of its life | A new heat pump with a higher HSPF2 rating | Higher tiers beat even a 95% gas furnace on running cost |
| No gas line, such as a new addition | A heat pump | Adding gas service plus a furnace and AC can cost more than a heat pump system |
Whatever the row, the system has to be sized for your house first. That means a load calculation built around Columbia’s 24°F design temperature.
Get a Load Calculation in Elgin, SC
In short: Start with a load calculation, then compare systems sized for your house. Call Evans Heating & Cooling at 803-438-1902.
The right answer to heat pump vs furnace starts with your house. Our heating services include load calculations, duct design and home energy audits, along with heating replacement and new installations. We size the system to your home first, then quote the heating setup that fits it.
Evans is a family business that has served Elgin for more than 40 years. Our technicians are certified by North American Technician Excellence (NATE), we install Trane and service all brands, and we hold an A+ rating with the Better Business Bureau (BBB). We serve Elgin, Lugoff, Camden and the rest of Kershaw County, and special financing is available.
Schedule a load calculation online, or call 803-438-1902.
Frequently Asked Questions
In short: Twelve quick answers on running costs, cold weather, dual fuel, rebates and efficiency ratings.
Is a heat pump or a furnace cheaper to run in South Carolina?
On EIA prices, a federal-minimum heat pump and an 80% gas furnace both come to about $20 per million BTU of heat. A 95% furnace is about $17, a 10 HSPF2 heat pump about $15, and an electric furnace about $44.
Is a heat pump better than a gas furnace?
It depends on the home. A heat pump also cools and needs no gas line. A gas furnace gives hotter air and full output in any cold snap, and Trane says it can last 20 years or more with proper maintenance.
What is the difference between a heat pump and a furnace?
A furnace makes heat by burning gas or running electric resistance elements. A heat pump moves heat from outdoor air into the house and reverses its cycle to cool.
Is a heat pump cheaper than an electric furnace?
Yes. The DOE says heat pumps “easily cut electricity use by 50%” compared with electric resistance heating, and that electric furnaces cost more to run than other resistance systems because of duct heat losses.
Do heat pumps work in South Carolina winters?
Yes, for nearly all of the season. NOAA data for Columbia show about 93 hours a year below 25°F, and backup heat covers those hours.
At what temperature does a heat pump need backup heat?
It depends on the model. Trane says variable-speed heat pumps keep 100% of their heating capacity down to around 27°F, and in a dual fuel system the furnace takes over around freezing for a standard heat pump.
What is a dual fuel system?
A heat pump and a gas furnace on one thermostat. The heat pump runs until it’s too cold to run efficiently, then the furnace takes over automatically.
Is there a federal tax credit for a heat pump in 2026?
No. The IRS says the energy efficient home improvement credit can’t be claimed for property placed in service after December 31, 2025.
Does Dominion Energy South Carolina offer a heat pump rebate?
Yes, $650 when a new ENERGY STAR qualified heat pump replaces an electric furnace. It’s for Dominion electric residential customers, with no fuel switching, a licensed mechanical contractor, and an application within 90 days.
What is the minimum efficiency for a new heat pump in South Carolina?
The federal minimum for split heat pumps made since January 1, 2023, is 14.3 SEER2 and 7.5 HSPF2.
Can a heat pump replace a furnace?
Yes. A heat pump can replace both the furnace and the AC, and most carry electric backup heat for the coldest hours, so a furnace isn’t required. Homes with gas can keep the furnace as dual fuel backup.
What are the downsides of a heat pump?
It costs more up front than a furnace by itself, the air at the register feels cooler, and Trane puts its life at about 15 years against 20 or more for a furnace. It also leans on backup heat in the coldest hours.
Definition Bank
| Term | Meaning |
|---|---|
| Heat pump | An electric system that moves heat into the house in winter and out in summer. |
| Gas furnace | A heater that burns natural gas and blows the warm air through ducts. |
| Electric furnace | A heater that blows air over electric resistance elements. |
| HSPF2 | Heating seasonal performance factor 2, BTU of heat per watt-hour over a test season. |
| SEER2 | Seasonal energy efficiency ratio 2, the cooling efficiency rating. |
| AFUE | Annual fuel utilization efficiency, the share of fuel that becomes heat. |
| Condensing furnace | A gas furnace rated about 90% AFUE or higher, which recovers heat from its exhaust. |
| Dual fuel | A heat pump and a gas furnace sharing one thermostat. |
| Backup heat (AUX) | Heat strips that switch on automatically when the heat pump needs help. |
| Emergency heat | A thermostat setting, switched on by hand, that runs backup heat alone. |
| Defrost cycle | The routine that clears frost from the outdoor coil. |
| 99% heating design temperature | The outdoor temperature a location stays above 99% of the hours in a typical year. |
| Load calculation | A room-by-room estimate of how much heating and cooling a house needs. |
| BTU | British thermal unit, a measure of heat. |
Entity Cards
Dominion Energy South Carolina, Electric Furnace to Heat Pump Rebate
| Property | Value |
|---|---|
| Amount | $650 |
| Customers | Dominion electric residential |
| Equipment | ENERGY STAR qualified heat pump replacing an electric furnace |
| Fuel switching | Not allowed |
| Installer | Licensed mechanical contractor |
| Deadline | 90 days from installation |
Columbia, SC winter (NOAA NCEI, 1973 to 1996)
| Property | Value |
|---|---|
| 99% design temperature | 24°F |
| 99.6% design temperature | 20°F |
| Hours below 25°F | About 93 a year |
| Hours below 20°F | About 27 a year |
Evans Heating & Cooling
| Property | Value |
|---|---|
| Location | 1232-B Rose Street, Elgin, SC 29045 |
| Phone | 803-438-1902 |
| In business | More than 40 years |
| Technicians | NATE-certified |
| Brands | Installs Trane, services all brands |
| Rating | BBB A+ |
| Service area | Elgin, Lugoff, Camden, Kershaw County |
Sources
- U.S. Energy Information Administration, Electric Power Annual, average revenue per kilowatthour by state, 2025 data
- U.S. Energy Information Administration, South Carolina Price of Natural Gas Delivered to Residential Consumers
- U.S. Energy Information Administration, FAQ: converting natural gas prices to dollars per Btu
- U.S. Department of Energy, 2023 Central Air Conditioner and Heat Pump Standards FAQ, October 5, 2022
- U.S. Department of Energy, Energy Saver, Air-Source Heat Pumps
- American Gas Association, Natural Gas or a Heat Pump? Where You Live Matters, January 2024
- U.S. Department of Energy, Energy Saver, Electric Resistance Heating
- Trane, Heat Pumps
- Trane, What Is an Air Source Heat Pump?
- U.S. Department of Energy, Energy Saver, Operating and Maintaining Your Heat Pump
- Trane, Heat Pump vs. Furnace: Which Heating System Is Right For You?, September 15, 2023
- Trane, Furnace Heat vs Heat Pump Heat: Understanding the Difference, December 16, 2025, updated May 15, 2026
- U.S. Consumer Product Safety Commission, Carbon Monoxide Information Center
- Dominion Energy South Carolina, Electric Furnace to Heat Pump Rebate
- NOAA National Centers for Environmental Information, Engineering Weather Data, Columbia, SC, 1973 to 1996
- ENERGY STAR, Design Temperature Limit Reference Guide
- Trane, Heat Pump Maintenance
- Trane, HVAC Basics: Heat Pump and Furnace Matched System, updated February 27, 2026
- Internal Revenue Service, Instructions for Form 5695 (2025)
- ENERGY STAR, Maintenance Checklist
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