In our experience running our HVAC service for more than four decades, we’ve seen heat pump replacement costs vary by several thousand dollars, and the numbers you see online don’t always describe the same type of replacement.
For example, when we can reuse the existing ductwork, electrical service, and refrigerant lines, the replacement usually costs considerably less than a job that requires a complete matched system along with changes to the ducts, wiring, thermostat, or other parts of the installation.
The size and efficiency of the new heat pump also affect the price, along with whether you choose a standard single-stage system or more advanced two-stage or variable-speed equipment.
In this guide, we’ll explain what you can expect to pay to replace a heat pump, what is normally included in the cost, what can make a replacement more expensive, and when it may make more sense to replace an older heat pump rather than repair it.
How Much Does It Cost to Replace a Heat Pump?
For a central air-source heat pump, a complete installed replacement often falls around $6,000 to $15,000, although straightforward systems can come in below that range and premium variable-speed systems or installations requiring significant additional work can cost more.
As a national reference point, the average air-source heat pump replacement is about $8,350.
Heat pumps are the most common heating system in South Carolina, with more than 40 percent of homes in the state heating with one compared with about 17 percent nationally, so we see the full range of replacement situations.
In South Carolina, a 3-ton system with a new air handler is roughly $10,000 to $13,000.
A like-for-like replacement where we can reuse the existing ductwork, electrical service, and other parts of the installation can be considerably less expensive than a job where the indoor equipment also needs to be replaced, or we need to make changes to the ducts, wiring, refrigerant lines, or controls.
What Does a Heat Pump Replacement Price Include?
When we quote a complete heat pump replacement, the price may include:
- the new outdoor heat pump
- a compatible indoor air handler or evaporator coil when it is being replaced
- removal and disposal of the old equipment
- refrigerant recovery and connections
- necessary installation materials
- electrical and condensate connections
- the mechanical permit required for the replacement
- startup, testing, and system setup
Greenville County requires a mechanical permit for a heat pump replacement, and the county’s residential fee for a heat pump is currently listed at $84.
The City of Greenville and surrounding jurisdictions have their own fee schedules. A licensed contractor pulls the permit as part of the job, so a quote that leaves the permit out or asks you to pull it yourself is worth questioning.
When you compare quotes, check that each one lists the model numbers for the outdoor unit and any indoor equipment, states whether the permit and old equipment removal are included, and spells out the parts and labor warranty.
Also, replacing only an outdoor heat pump while keeping compatible indoor equipment is a very different job from replacing the heat pump and air handler together.
The second option costs more upfront, but it may be necessary to properly match the equipment and achieve the efficiency and performance the new system is rated for.
What Can Add to the Replacement Cost?
A straightforward heat pump replacement usually costs less when most of the existing installation can remain in place.
The price can increase if we find that the job also requires:
- ductwork repairs or modifications
- a new or modified refrigerant line set
- electrical circuit or disconnect changes
- a new thermostat or communicating control
- condensate drain changes
- equipment relocation
- difficult attic or crawl-space access
- other work needed to install and operate the new system correctly
That is why we prefer to give homeowners a range for planning purposes and then price the actual replacement after looking at the existing system and installation.
What Affects the Cost of Replacing a Heat Pump?
When we price a heat pump replacement, we also look at the size and efficiency of the new system, what indoor equipment needs to be replaced, and how much of the existing installation can safely be reused.
Heat Pump Size
Larger heat pumps generally cost more because they have greater heating and cooling capacity, but the replacement should not automatically be the same size as the old unit.
When we evaluate a replacement, we look at the heating and cooling load of the home through a Manual J load calculation rather than choosing equipment based on square footage alone.
An oversized heat pump can cycle too frequently and do a poor job controlling humidity. An undersized system may run for long periods and struggle to keep the home comfortable during hotter or colder weather.
Insulation, windows, air leakage, sun exposure, ductwork, and home changes can all affect the capacity the home actually needs.
Efficiency and Compressor Type
Higher-efficiency heat pumps generally cost more upfront, and the type of compressor is a major part of that difference.
A single-stage heat pump operates at one output level and is usually the least expensive option.
A two-stage heat pump can operate at a lower capacity during milder conditions and increase output when the home needs more heating or cooling.
A variable-speed heat pump can adjust its output across a much wider range. These systems generally cost more because the compressor, controls, indoor equipment, and thermostat may all be more advanced, but they can provide more consistent temperatures, quieter operation, and better humidity control.
Efficiency ratings such as SEER2 and HSPF2 also affect equipment price. Since 2023, new split-system heat pumps sold in the United States must meet at least 14.3 SEER2 and 7.5 HSPF2, so even the lowest-cost equipment we install is usually more efficient than the system it replaces.
We usually look at the additional cost of moving to a higher-efficiency system alongside the home’s usage, comfort needs, and how long the homeowner expects to keep the equipment rather than assuming the highest-efficiency model is always the best choice.
At Duke Energy’s current residential rates, which work out to roughly 15 cents per kilowatt-hour on a typical bill, the payback on a higher-efficiency system depends heavily on how much the home runs the equipment.
Whether the Indoor Equipment Needs to Be Replaced
One of the biggest differences between heat pump replacement quotes is whether the price includes only the outdoor heat pump or the indoor equipment as well.
The outdoor heat pump works together with an indoor coil or air handler, and the two pieces of equipment need to be compatible in capacity, refrigerant, controls, and rated performance.
In some situations, compatible indoor equipment can remain in place. In others, replacing the outdoor unit means the air handler or indoor coil also needs to be replaced to create a properly matched system.
Mismatched equipment can also affect warranty coverage, since many manufacturers register and warrant the outdoor unit and indoor coil or air handler as a matched pair.
This is why an outdoor-unit-only replacement can cost considerably less than replacing the complete indoor and outdoor system, even when both quotes are described simply as a “heat pump replacement.”
Existing Ductwork
If the existing ducts are in good condition and can handle the airflow required by the new system, we can usually continue using them.
If we find leaking, damaged, undersized, or poorly configured ductwork, some changes may be needed as part of the replacement.
We often pay particular attention to the return side of the system. A new heat pump cannot perform the way it should if the ductwork cannot move enough air through the equipment, regardless of how efficient the unit itself is.
Minor duct modifications differ greatly from replacing a large portion of the duct system, so this can significantly affect the final price when more extensive work is required.
National cost guides put duct work anywhere from a few hundred dollars for sealing and minor changes to several thousand dollars for larger replacements, which is why we assess the ducts before quoting rather than adding a blanket allowance.
Electrical, Refrigerant Line, and Thermostat Requirements
A straightforward replacement costs less when the existing electrical service, refrigerant lines, drain connections, and thermostat can be reused.
On other jobs, we may need to change the breaker or disconnect, modify wiring, replace or alter the refrigerant line set, install a different thermostat, or change the condensate drain.
Newer heat pumps may also use different refrigerants and controls than the equipment being removed.
Most new systems now use R-454B or R-32 in place of R-410A. These refrigerants are classified as mildly flammable, so the equipment includes leak detection and other safety features, and the indoor coil, line set, and installation materials need to be rated for the new refrigerant.
In many cases the existing line set can be flushed, pressure tested, and reused, but when it is the wrong size, damaged, or cannot be cleaned properly, it needs to be replaced.
When that is the case, we must ensure the indoor equipment, refrigerant lines, installation materials, and controls are compatible with the new system rather than assuming everything from the old installation can remain.
Installation Difficulty
Two otherwise identical heat pumps can have different installation costs depending on where the equipment is located and how easily we can remove and replace it.
An air handler in an easily accessible utility room is generally simpler to replace than one installed in a tight attic or crawl space.
The cost can also increase when we need to relocate equipment, run longer refrigerant lines, make structural or access changes, or do additional work to bring the installation up to the new system’s requirements.
Brand, Equipment Tier, and Warranty
Brand can affect heat pump cost, but we generally find that the specific product line and equipment level matter more than the brand name alone.
Most manufacturers sell everything from basic single-stage heat pumps to premium variable-speed systems. Two systems from the same manufacturer can therefore have very different prices.
In our experience, the quality of the installation, including the load calculation, duct design, refrigerant charge, and startup, has more to do with how a system performs than the name on the outdoor unit.
Consider the warranty when comparing equipment. Manufacturer parts coverage, compressor coverage, registration requirements, and the contractor’s labor warranty can all differ between systems and affect the overall value of the replacement.
Can Rebates Lower the Cost of a Heat Pump Replacement?
Depending on where you live, who provides your electricity, and the type of equipment being installed, a rebate may reduce the upfront cost of replacing a heat pump.
The federal Energy Efficient Home Improvement Credit, which previously allowed up to $2,000 for qualifying heat pumps, is no longer available for systems placed in service after December 31, 2025.
Duke Energy’s Smart $aver program currently offers $500 toward replacing an existing heat pump system, and larger rebates of $600 to $1,000 for homes replacing electric strip heat with a heat pump.
The program requires a free Duke Energy Home Energy Check before the work begins, a Duke-approved contractor, replacement of both the outdoor unit and the air handler, and an application within 90 days of installation.
Duke increased its South Carolina residential HVAC and heat-pump incentives in August 2025, so we recommend checking the current eligibility before choosing equipment based on a rebate alone.
South Carolina is also developing its Home Energy Rebate programs, but as of this writing neither the HEAR nor the HOMES program has launched, and the state energy office has said rebates are not currently available.
There is also an important limitation for homeowners who already have a heat pump. The state has said that replacing an existing electric heat pump with another heat pump is not eligible for the HEAR rebate under Department of Energy guidance.
If a rebate is available for your home, we look at it as one part of the replacement decision rather than choosing a system simply because it qualifies for the largest incentive.
The equipment still needs to be the right size, properly matched to the indoor system, and appropriate for the way you use your home.
Should You Repair or Replace Your Heat Pump?
When we inspect an older system, we look at what failed, what the repair will cost, the condition of the indoor and outdoor equipment, and whether there are other signs of another major repair coming.
Most heat pumps last about 12 to 15 years, and well-maintained systems sometimes run longer, so the question usually comes up once a unit is past that point or a major component fails before it.
A relatively minor repair can still make sense on a system that is otherwise in good condition. The decision becomes harder when the heat pump needs a compressor, coil, major refrigerant repair, or another expensive component.
We are more likely to discuss replacement when:
- the heat pump is already well into its service life
- the system has needed several repairs in a short period
- the compressor or a major coil has failed
- there is a significant refrigerant leak
- the indoor and outdoor equipment are both aging
- the system has ongoing comfort or humidity problems
- the repair cost is a large portion of what a replacement would cost
We do not recommend replacing a heat pump based on age alone. If the system has been reliable and the repair is relatively small, fixing it may still make sense.
If the equipment is older and the current repair is expensive, we also look at what else is still original and how much useful life is likely left in the rest of the system.
Older heat pumps that use R-22 can be more expensive to repair when a major refrigerant leak is involved because new R-22 is no longer produced or imported in the United States for servicing existing systems.
When the repair is expensive, we compare the cost of fixing the current problem with the value of a replacement, which includes new equipment, a new warranty, potentially better efficiency and comfort, and less risk of putting more money into another major repair on the existing system.
Heat Pump Replacement in Greenville, SC
If your heat pump is getting older, needs a major repair, or no longer keeps your home comfortable the way it should, the first step is figuring out what actually needs to be replaced.
When we evaluate a heat pump replacement, we look at the condition of the indoor and outdoor equipment, the ductwork, electrical service, refrigerant lines, thermostat, and the heating and cooling load of the home before recommending a new system.
That also gives us a much more accurate replacement price than simply choosing equipment based on the size of the old heat pump or a national cost average.
Air Today Heating & Cooling provides heat pump replacement throughout Greenville and the Upstate. Call 864-295-0905 or contact Air Today to schedule an estimate for your home.