How much does it cost to replace an HVAC system?
Replacing a central air conditioner typically costs about $5,000-$12,000 installed, a gas furnace $3,000-$7,500 and a heat pump $5,000-$15,000, based on typical national ranges. A full system with new ductwork can reach $20,000 or more. Size, efficiency (SEER2), ductwork condition and local labor rates drive most of the difference. A common rule of thumb says to consider replacement when the system's age times the repair cost exceeds $5,000. With a home warranty, a covered repair or replacement costs you the service fee plus anything above the plan's cap. Our recommendation: Liberty Home Guard, our top-rated provider, whose Systems Guard covers AC and heating up to 5 tons plus ductwork.
- Central AC: about $5,000-$12,000; furnace: $3,000-$7,500; heat pump: $5,000-$15,000.
- A complete quote includes the matched coil, line set, permit, thermostat and haul-away - missing items make quotes look cheaper.
- Higher SEER2 saves energy, but each step up saves less; run the payback math before paying a premium.
- Age × repair cost over $5,000 is a common signal to consider replacement.
- Home warranty HVAC caps range from $1,500 to unlimited among major providers, so compare caps, not just premiums.
- Federal and local incentives change often; check energy.gov and your utility before you buy.
- Liberty Home Guard, our top-rated provider, covers AC and heating up to 5 tons plus ductwork in Systems Guard.
How Much Does HVAC Replacement Cost by System Type?
Most homeowners pay somewhere between $3,000 and $15,000 to replace a single HVAC component, and a full system with new ductwork can pass $20,000. Where you land depends mostly on which equipment you are replacing and how big your home is.
The table below shows typical national installed ranges, which include the equipment, labor and basic materials. A gas furnace is usually the least expensive piece to swap, while heat pumps vary the most because they range from basic single-stage units to high-efficiency variable-speed systems.
| System | Typical installed cost | Typical lifespan | Best suited to |
|---|---|---|---|
| Central air conditioner | $5,000-$12,000 | 12-17 years | Homes with existing ducts and a separate furnace |
| Gas furnace | $3,000-$7,500 | 15-20 years | Cold-winter regions with natural gas service |
| Heat pump | $5,000-$15,000 | 10-15 years | Mild and moderate climates; heats and cools |
| Ductless mini-split (per zone) | $2,000-$5,000 | 15-20 years | Additions, older homes without ducts |
| Full system + ductwork | $12,000-$20,000+ | - | Homes whose ducts are leaking, undersized or missing |
Typical national installed price ranges compiled from major home-cost guides; local prices vary by region, home and brand.
If your AC and furnace are both near the end of their lives, replacing them together often costs less than two separate jobs, because the crew, permit and refrigerant work happen once and the new indoor coil is matched to the new outdoor unit.
What Is Inside an HVAC Replacement Quote?
A complete quote should list the equipment and every piece of labor and material needed to make it work and pass inspection. Low quotes are often low because something on this list is missing, not because the contractor is more efficient.
| Line item | What it covers | Often left out of low quotes? |
|---|---|---|
| Equipment | Outdoor unit, furnace or air handler, and a matched indoor coil | Sometimes the coil is omitted to cut the price |
| Labor | Removal, installation, startup and testing | Rarely |
| Refrigerant line set | Copper lines between indoor and outdoor units | Yes - reusing old lines can cause problems |
| Pad, brackets and disconnect | Mounting and electrical shutoff for the outdoor unit | Sometimes |
| Thermostat | A thermostat compatible with the new system | Often |
| Permit and inspection | Local building permit fees | Yes |
| Duct modifications | Transitions, sealing or resizing ducts | Often quoted later as an extra |
| Haul-away | Disposal of old equipment and refrigerant recovery | Sometimes |
| Warranty registration | Registering the manufacturer's parts warranty | Sometimes |
Ask every contractor to put these items in writing so you can compare quotes line by line. Also ask whether they perform a load calculation (commonly called a Manual J). Sizing a system by simply copying the old unit's tonnage can carry an old mistake forward.
Does Where You Live Change the Price?
Yes. The same system can cost noticeably more in one market than another because of labor rates, climate and local code requirements.
- High-cost metro areas (much of the Northeast, the West Coast and large cities generally) tend to have higher labor rates and permit costs.
- Lower-cost areas (many parts of the South and Midwest) usually see lower labor prices, though hot climates may call for larger AC systems.
- Climate shapes what you buy: very cold areas lean on furnaces or cold-climate heat pumps, while hot, humid areas lean on higher-capacity cooling.
- Season matters everywhere: replacement during a summer heat wave or a winter cold snap leaves less room to negotiate.
Because regional differences are large, the most reliable number for your home is a set of written local quotes, not a national average.
How Do SEER2 Ratings Affect What You Pay?
A higher SEER2 rating means a more efficient air conditioner or heat pump. It costs more up front and lowers your electric bill, but each step up saves less than the one before.
SEER2 is the federal efficiency rating used for central AC and heat pumps since 2023. Federal minimums for common split-system AC sizes are about 13.4 SEER2 in northern states and 14.3 SEER2 in southern states. Furnaces use a different rating, AFUE, which shows the share of fuel that becomes heat.
Cooling energy use falls roughly in proportion to the efficiency ratio, which lets you estimate payback:
Assume your new baseline system would cost about $900 a year to run for cooling.
| Scenario | Old unit → baseline | Baseline → premium |
|---|---|---|
| Efficiency change | SEER2 10 → 15 | SEER2 15 → 18 |
| Energy used vs. before | 10 ÷ 15 = 67% | 15 ÷ 18 = 83% |
| Yearly cooling cost | $1,350 → $900 | $900 → $750 |
| Yearly savings | $450 | $150 |
| Extra up-front cost (assumed) | - | $1,800 |
| Simple payback | - | $1,800 ÷ $150 = 12 years |
The jump from an old unit to any modern system saves the most. The premium upgrade pays back only if you run AC heavily, have high electricity rates or plan to stay well beyond a decade.
Should You Repair or Replace Your HVAC System?
A widely used rule of thumb is to multiply the system's age by the repair cost. If the result is more than $5,000, replacement is usually worth a serious look.
The rule is a starting point, not a verdict. It does not account for efficiency savings, refrigerant availability or a warranty that would pay for the repair.
| Example | Age | Repair quote | Age × cost | Rule suggests |
|---|---|---|---|---|
| Blower motor on a young furnace | 6 years | $700 | $4,200 | Repair |
| Compressor on an aging AC | 12 years | $2,200 | $26,400 | Replace |
| Capacitor on an older heat pump | 11 years | $250 | $2,750 | Repair |
Other signs that point toward replacement include repeated breakdowns in the same season, rooms that never reach the set temperature, rising energy bills with no change in use, and an older AC that uses a refrigerant being phased out, which can make recharges and some repairs more expensive.
What Do Common HVAC Repairs Cost?
Most HVAC repairs cost a few hundred dollars. The big exceptions are compressors and coils, which can approach the price of a new unit on an older system.
| Repair | Typical cost |
|---|---|
| AC compressor | $1,500-$3,000 |
| Evaporator coil | $1,000-$2,800 |
| Blower motor | $400-$1,500 |
| Capacitor | $150-$400 |
| Furnace igniter or flame sensor | $150-$400 |
Typical national installed price ranges compiled from major home-cost guides; local prices vary by region, home and brand.
Does the HVAC Brand Matter?
Brand matters less than most people expect. Installation quality, correct sizing and a good warranty usually have a bigger effect on how long a system lasts than the logo on the cabinet.
Many brands share manufacturers and components, and most offer value, mid-range and premium product lines. Instead of chasing a brand, compare these points:
- Parts warranty length and whether registration is required to get the full term
- Whether the installer is trained and authorized for that equipment line
- Local availability of replacement parts and service technicians
- Single-stage, two-stage or variable-speed operation, which affects comfort and price
- The installer's own labor warranty, which is separate from the manufacturer's parts warranty
Are There Tax Credits or Rebates for a New HVAC System?
Sometimes, but incentives change often, so verify before you count on one. Do not assume a credit you read about last year still applies.
The federal Energy Efficient Home Improvement Credit (Section 25C) has historically applied to qualifying heat pumps, central air conditioners and furnaces, but its status has changed with recent legislation. Check the current rules at energy.gov and confirm with a tax professional before you buy.
Other places to look:
- Utility rebates for high-efficiency equipment or heat pumps, which vary by provider.
- State or local energy programs, which may offer rebates or low-interest financing.
- Manufacturer promotions, usually seasonal and tied to specific models.
Rebates often require paperwork from the installer at the time of purchase, so ask about them before you sign, not after.
How Long Does an HVAC System Last, and What Maintenance Helps?
With routine care, central AC typically lasts 12-17 years, furnaces 15-20 years and heat pumps 10-15 years. Skipping basic maintenance shortens those numbers and can also complicate warranty claims.
- Change the air filter. Every 1-3 months depending on filter type, pets and dust.
- Book a yearly tune-up. Cooling check in spring and heating check in fall; heat pumps benefit from both.
- Keep the outdoor unit clear. Leave a couple of feet of open space and rinse debris off the coil fins gently.
- Clear the condensate drain. A clogged line can shut the system down or cause water damage.
- Keep records. Save receipts and service reports. Home warranty providers may ask for them when a claim is filed.
How Does a Home Warranty Cover HVAC?
A home warranty systems plan pays to repair or replace covered heating and cooling equipment that fails from normal wear and tear. You pay the service fee, plus any cost above the plan's cap.
Caps are the number to compare, because HVAC jobs are often expensive. The national providers we compare range from $1,500 on heating and cooling to unlimited:
| Company | Coverage caps | Service fee | HVAC note |
|---|---|---|---|
| Liberty Home Guard | $2,000 per item for most systems & appliances | $65-$125 | AC and heating up to 5 tons plus ductwork (Systems Guard) |
| Choice Home Warranty | $3,000 per item | $85 | AC only in the higher Total Plan |
| Cinch Home Services | A/C & heating $1,500; plumbing $1,000; appliances $2,000; $10,000 per term | $100-$150 | Covers unknown pre-existing conditions |
| First American | Unlimited on HVAC, plumbing & electrical; appliances $3,500-$7,000 | $100 or $125 | Starter plan excludes AC; 36 states |
| 2-10 Home Buyers Warranty | ~$2,000 per category ($5,000 with Luxury Package); $25,000 per 12 months | $65, $85 or $100 | $25,000 annual aggregate cap |
Caps and fees from published plan terms checked October 2026; they can vary by plan, state and contract.
Assume your 9-year-old AC needs a $2,500 compressor repair and the failure is covered.
| Plan cap | Plan pays | Above cap (you pay) | Plus service fee |
|---|---|---|---|
| $1,500 | $1,500 | $1,000 | Yes |
| $2,000 | $2,000 | $500 | Yes |
| $3,000 | $2,500 | $0 | Yes |
| Unlimited | $2,500 | $0 | Yes |
Without coverage, the full $2,500 is yours. For a full replacement that costs more than the cap, the plan pays up to the cap and you cover the difference.
Read the exclusions too. Common ones include improper installation, lack of maintenance, code upgrades, permits, crane fees and duct modifications needed to fit new equipment. Waiting periods also apply, usually around 30 days after you enroll.
Liberty Home Guard's Systems Guard covers air conditioning and heating up to 5 tons plus ductwork, starting at $49.99/month with current online pricing and service fees from $65 in many areas. Read our Liberty Home Guard review.
How Can You Get the Lowest Price on HVAC Replacement?
The best way to lower the price is to compare at least three complete written quotes and avoid replacing in an emergency.
- Plan ahead. If your system is near the end of its life, replace it in spring or fall when contractors are less busy.
- Get three itemized quotes. Compare the same line items, including the coil, line set, permit and haul-away.
- Ask for a load calculation. The right size avoids overpaying for capacity you do not need.
- Choose efficiency on purpose. Use the payback math above instead of buying the highest rating by default.
- Check rebates and financing terms. Read the full cost of any financing offer, not just the monthly payment.
- Use your coverage. If you have a home warranty, file the claim first; replacing on your own usually forfeits that benefit.
For more on plan costs and value, see home warranty cost and is a home warranty worth it.
Frequently asked questions
How long does an HVAC system last?
Central AC units usually last about 12-17 years, furnaces 15-20 years and heat pumps 10-15 years with regular maintenance.
Is it cheaper to replace the AC and furnace at the same time?
Often, yes. One crew, one permit and a matched indoor coil usually cost less than two separate jobs, and the components are designed to work together.
Does a home warranty cover HVAC replacement?
Yes, when the failure is covered and the unit can't be repaired - up to the plan's cap. You pay the service fee and anything above the cap. Compare caps on our best home warranty page.
What is the $5,000 rule for HVAC?
It is a rule of thumb: multiply the system's age by the repair cost. If the result is above $5,000, replacement is often the better long-term choice.
Is there still a federal tax credit for a new heat pump or AC?
Federal credits such as Section 25C have changed with recent legislation. Check energy.gov and a tax professional for the current rules before you buy.