A complete HVAC replacement typically costs about $5,000 to $11,000 for a straightforward change-out of the main heating and cooling equipment. More complicated installations involving new ductwork, higher-efficiency equipment, electrical work, or major modifications can cost substantially more.
RefitZen quick answer: If your existing ductwork is usable and you are replacing a conventional furnace-and-air-conditioner system with comparable equipment, a starting budget of roughly $5,000 to $12,500 is reasonable for planning. Get actual written bids before making a purchasing decision.
HVAC Replacement Cost at a Glance
| Project | Typical installed cost |
|---|---|
| Basic HVAC system replacement | $5,000–$11,000 |
| Typical national average | About $7,500–$8,000 |
| Furnace + central AC replacement | $5,000–$12,500 |
| New HVAC system with ductwork | $7,000–$16,000 |
| System with ductwork and major add-ons | $9,500–$18,500 |
These are national planning ranges rather than quotes for a particular home. Local labor rates, climate, equipment size, efficiency, electrical work, and the condition of the existing duct system can change the final price substantially. Published cost data from HomeGuide and Angi provide useful national benchmarks, but local bids are what matter for a specific project.
HVAC Replacement Cost by Home Size
Home size affects cost because larger houses generally require equipment with greater heating and cooling capacity. As a rough planning estimate, some national cost guides place complete HVAC installation at approximately $3 to $6 per square foot.
| Home size | Rough installed-cost range |
|---|---|
| 1,000 sq. ft. | $3,000–$6,000 |
| 1,200 sq. ft. | $3,600–$7,200 |
| 1,600 sq. ft. | $4,800–$9,600 |
| 2,000 sq. ft. | $6,000–$12,000 |
| 2,500 sq. ft. | $7,500–$15,000 |
| 3,000 sq. ft. | $9,000–$18,000 |
Do not choose HVAC capacity based only on square footage. A professional load calculation considers insulation, windows, air leakage, climate, orientation, and other characteristics of the house. ACCA’s Manual J is the recognized residential load-calculation standard.
That means a contractor should not simply say, “Your old system was four tons, so we’ll install another four-ton system.” The replacement should be sized for the home’s actual heating and cooling load.
What Makes One HVAC Replacement Cost More Than Another?
Two homeowners with similarly sized houses can receive very different quotes. The largest differences usually come from the equipment being installed, the amount of work required to make it fit the home, and whether other portions of the HVAC system need to be repaired or replaced.
| Cost factor | Why it matters |
|---|---|
| System type | Furnace/AC, heat pump, packaged systems, and other configurations have different equipment and installation costs. |
| Equipment size | Higher-capacity systems generally cost more. |
| Efficiency | Higher-efficiency equipment often costs more upfront. |
| Ductwork | Damaged, undersized, or poorly designed ducts can add substantial work. |
| Electrical work | Some replacements require new circuits, disconnects, panels, or wiring. |
| Installation difficulty | Attics, crawl spaces, rooftops, and difficult access can increase labor. |
| Climate | Heating and cooling requirements vary by region. |
| Permits | Permit and inspection requirements vary by jurisdiction. |
| Controls | Thermostats, zoning, and communicating controls add cost. |
| Old-equipment removal | Refrigerant recovery and disposal can add to the invoice. |
Does HVAC Replacement Include Ductwork?
Usually not automatically. A basic HVAC “change-out” normally means replacing major equipment while leaving usable ductwork in place. National cost guides commonly put a change-out around $5,000 to $11,000, while a system installation that includes ductwork is often closer to $7,000 to $16,000.
That distinction matters when comparing quotes. One contractor may quote only the furnace and air conditioner. Another may include duct repairs, new return-air capacity, electrical work, a thermostat, permits, and disposal. The second quote can look substantially more expensive even though it includes considerably more work.
Ask each contractor to itemize the scope.
How Much Does Duct Replacement Add?
Ductwork is one of the biggest variables hidden behind an HVAC quote. Angi’s 2026 data places professional residential duct replacement at approximately $452 to $2,182, with a national average around $1,250, although extensive redesigns or difficult installations can cost more. See Angi’s duct replacement cost guide.
More importantly, ductwork should be evaluated as part of the system rather than treated as an unrelated accessory. ACCA’s residential design standards distinguish among Manual J, Manual S, and Manual D for load calculations, equipment selection, and duct design.
HVAC Replacement Cost by Project Type
| Replacement project | Typical installed-cost range |
|---|---|
| Central air conditioner | $2,500–$7,500 |
| Furnace | $2,000–$5,400 |
| Heat pump | $3,800–$8,200 |
| Furnace + AC system | $5,000–$12,500 |
| Complete system with new ductwork | $7,000–$16,000 |
| Geothermal heat pump | $15,000–$35,000 |
Published cost ranges vary because contractors, locations, equipment, and project scopes differ. Treat the numbers as budgeting references rather than guaranteed prices.
Should You Replace the Furnace and Air Conditioner at the Same Time?
Not always. But replacing both can make sense when the components are similarly old, the new equipment needs to operate as a matched system, or the labor overlap makes a combined installation more economical.
Before agreeing to replace both, ask the contractor to show you:
- What is wrong with each existing component.
- The age and condition of each component.
- The price to replace only the failed equipment.
- The price to replace both.
- Whether retaining one old component limits the performance or warranty of the new one.
Repair or Replace Your HVAC System?
A large repair does not automatically mean an HVAC system should be replaced. Typical HVAC repairs often cost a few hundred dollars, while certain major components can cost much more. For example, HomeGuide reports substantially higher installed costs for items such as compressors, condensers, and air handlers. See HomeGuide’s HVAC repair cost guide.
Compare the repair price with the cost of replacement, but also consider the equipment’s age, condition, efficiency, remaining warranty, and the likelihood that other major components will soon fail.
A $300 repair on an otherwise sound system is a very different decision from a multi-thousand-dollar repair on an aging system with several deteriorating components.
One Important 2026 Change: Refrigerant Rules
Homeowners replacing an air conditioner or heat pump in 2026 should pay attention to the refrigerant used by the proposed system.
The U.S. Environmental Protection Agency says that beginning January 1, 2026, a newly installed whole residential split air-conditioning system must use a lower-global-warming-potential refrigerant rather than being installed as a new R-410A system. See the EPA’s HFC phasedown FAQs.
That does not mean an existing R-410A system suddenly becomes illegal or unusable. EPA says existing systems can continue to be maintained and repaired, and R-410A components can still be used to service existing R-410A systems.
When comparing a 2026 replacement quote, ask: “What refrigerant does this new system use, and is this a new-system installation or a repair of my existing system?”
What Does SEER2 Mean?
If you’re replacing central air conditioning, you will probably see SEER2 on estimates and equipment specifications. SEER2 is a measure of seasonal cooling efficiency. The U.S. Department of Energy changed the testing method and efficiency-rating terminology beginning in 2023, replacing the older SEER framework with SEER2 and similarly using HSPF2 for heat-pump heating efficiency. See the DOE’s central air-conditioner purchasing guidance.
A higher efficiency rating can reduce energy use, but the most efficient equipment is not automatically the best financial choice for every house.
| Question | Why it matters |
|---|---|
| What is the installed price difference? | Shows the actual efficiency premium. |
| What energy savings are estimated? | Helps determine potential payback. |
| How long will you own the home? | A long payback may matter less to a long-term owner. |
| Does your climate require heavy cooling or heating? | Efficiency can have more value when equipment runs more. |
| Are rebates available? | Incentives can change the economics substantially. |
Are There HVAC Tax Credits in 2026?
This is an area where older articles can give homeowners outdated information.
The federal Energy Efficient Home Improvement Credit under Internal Revenue Code section 25C ended for property placed in service after December 31, 2025. That means a qualifying central air conditioner, furnace, or heat pump installed in 2026 does not qualify for that former federal 25C credit. See the IRS’s current FAQ.
However, that does not mean every incentive disappeared. DOE says Home Energy Rebate programs are administered by individual states, territories, and Tribes, and eligibility varies by location. See the DOE Home Energy Rebates program.
Before buying equipment, check your state, local utility, and applicable rebate programs.
How Long Does HVAC Replacement Take?
A straightforward HVAC change-out can often be completed in about one day. Projects involving new ductwork commonly take several days, while installations involving additional upgrades may take longer.
The schedule can also be affected by permits, inspections, electrical work, equipment availability, and unexpected problems discovered after the old equipment is removed.
What Should Be Included in an HVAC Replacement Quote?
Do not compare HVAC estimates by looking only at the bottom-line price. A useful quote should make it possible to understand exactly what each contractor is selling.
| Ask the contractor to identify | What you want to know |
|---|---|
| Equipment manufacturer and model | Exactly what you’re buying |
| Heating/cooling capacity | Whether equipment is correctly sized |
| Efficiency ratings | SEER2, HSPF2, AFUE, or other applicable rating |
| Load calculation | How the contractor determined required capacity |
| Ductwork | What is being reused, repaired, or replaced |
| Electrical work | Whether upgrades are included |
| Thermostat/controls | Model and functionality |
| Refrigerant | What the new system uses |
| Permits | Who obtains them and whether the cost is included |
| Removal/disposal | Whether old-equipment removal is included |
| Labor warranty | Contractor’s workmanship coverage |
| Manufacturer warranty | Equipment coverage and registration requirements |
| Total installed price | Complete amount before optional extras |
One especially useful question is: “Can you show me the load calculation you used to select this system?”
ACCA’s retrofit guidance starts with a Manual J load calculation and then uses Manual S to select suitable equipment rather than simply replacing the old unit with one of the same nominal size. See ACCA’s retrofit system-design guidance.
How to Compare HVAC Replacement Quotes
The cheapest quote is not necessarily the least expensive system to own.
Suppose one contractor quotes $8,000 and another quotes $9,500. The $9,500 contractor might include a load calculation, duct modifications, permit, electrical corrections, upgraded controls, startup testing, and a stronger labor warranty. The $8,000 quote might exclude several of those items.
Before choosing, normalize the estimates by making sure each contractor is quoting substantially the same scope of work. That allows you to compare prices rather than accidentally comparing different projects.
HVAC Replacement Cost: Bottom Line
For a typical HVAC replacement in 2026, homeowners should generally begin with a planning range of approximately $5,000 to $11,000, with many combined furnace-and-AC projects reaching roughly $12,500 and complicated installations going substantially higher.
The most important number, however, is not the national average. It is the price of a correctly sized system for your particular house, installed with the ductwork, electrical work, controls, permits, and other modifications actually required.
Get multiple written estimates, compare the scope line by line, and ask how each contractor determined the equipment size before making a decision.
Frequently Asked Questions
How much does it cost to replace an entire HVAC system?
A conventional HVAC replacement commonly costs about $5,000 to $11,000, although equipment type, home size, ductwork, and installation complexity can push the total higher.
How much is an HVAC system for a 2,000-square-foot house?
A rough national planning range is approximately $6,000 to $12,000 for a 2,000-square-foot house, but square footage alone should not determine system size.
Is $10,000 expensive for HVAC replacement?
Not necessarily. $10,000 falls within published national ranges for many complete HVAC replacements. Whether it is competitive depends on the equipment, size, efficiency, ductwork, and other work included in the quote.
Does a new HVAC system include ductwork?
Usually not in a basic equipment change-out. A replacement without new ductwork is generally less expensive than a complete installation that includes duct replacement or redesign.
Is there a federal HVAC tax credit in 2026?
The former federal section 25C Energy Efficient Home Improvement Credit does not apply to property placed in service after December 31, 2025. State, utility, and Home Energy Rebate programs may still provide incentives.
Can a contractor install a new R-410A HVAC system in 2026?
EPA says a completely new residential split air-conditioning system installed after January 1, 2026 must use lower-GWP refrigerant. R-410A components can still be used to repair and service existing R-410A systems.
Should the replacement HVAC system be the same size as the old one?
Not automatically. A professional load calculation should determine the home’s actual heating and cooling requirements before equipment is selected.
More RefitZen Cost Guides
Continue with Air Conditioner Replacement Cost, HVAC Repair Cost, Heat Pump Replacement Cost, HVAC Installation Cost, and Furnace Replacement Cost. Browse the full RefitZen Costs library.
RefitZen provides practical homeowner information for planning and comparison purposes. Costs vary by location and project. Follow applicable codes, permit requirements, manufacturer instructions, and qualified professional guidance for work involving HVAC, electrical, fuel-gas, or refrigerant systems.
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