2026 NATIONAL COST ANSWER
HVAC replacement costs about $5,000–$22,000 in Angi's current 2026 data, with an average around $7,500. A straightforward furnace-and-AC change-out can stay near $5,000–$12,500, while new ductwork and infrastructure push the project higher.
Angi's August 3, 2026 national update places HVAC replacement at$5,000–$22,000 and about$7,500 on average. Its July 2026 guide for replacing a furnace and AC together uses $5,000–$12,500.
HomeGuide's current system guide places a typical furnace-and-AC replacement at $5,000–$11,000, a new HVAC system with ductwork at $7,000–$16,000, and a system with ductwork plus add-ons at $9,500–$18,500.
THE WORD “REPLACEMENT” HIDES THREE DIFFERENT PROJECTS
A $7,000 change-out and a $16,000 system replacement may not be competing quotes
HomeGuide currently uses $5,000–$11,000 for this class of project and says it is appropriate when existing ductwork is in excellent condition.
HomeGuide uses $7,000–$16,000. This is a different construction scope, not a more expensive version of the exact same change-out.
HomeGuide uses $9,500–$18,500 for projects with ductwork and additional features such as zoning or whole-house accessories.
Moving from furnace + AC to a heat pump, changing fuel type or adding electrical capacity can alter both equipment and infrastructure.
Before comparing price, write one sentence describing the endpoint: “new outdoor unit + indoor coil + furnace on existing ducts,” or “new heat pump + air handler + duct modifications + electrical work.”
SQUARE FOOTAGE IS A BUDGET ANCHOR, NOT A SIZING METHOD
A 2,000-square-foot house may budget around $6,000–$12,000, but it does not automatically need one specific tonnage
HomeGuide publishes a broad HVAC budget of about$3–$6 per square foot, putting a 2,000-square-foot replacement around $6,000–$12,000. That is useful for early budgeting. It is not a reliable equipment-sizing formula.
CLIMATEOutdoor design conditions change the loadA similar house in Phoenix and Seattle does not ask the equipment to solve the same heating and cooling problem.
ENVELOPEInsulation and air leakage change capacity needsBetter envelopes reduce the heat entering or leaving the home.
WINDOWSOrientation and glazing affect solar / conductive loadAngi specifically identifies windows as part of the sizing decision.
DUCTSAirflow capacity can constrain equipment selectionUpsizing the equipment without checking ducts can create a system that cannot move the required air properly.
LOAD CALCULATIONManual J or equivalent should justify the selected capacityENERGY STAR's current heat-pump guidance explicitly tells consumers to have the contractor verify proper sizing using Manual J.
WHAT ARE YOU ACTUALLY REPLACING?
Furnace + AC and heat pump systems belong to different cost stories
Angi's July 2026 national combined-replacement range. This keeps separate combustion / resistance heating and compressor-based cooling.
Useful when the furnace / air handler remains compatible and serviceable. HomeGuide's standard-efficiency AC guide is currently higher at $5,000–$8,300.
HomeGuide's current gas-furnace guide is $3,800–$12,000 depending on efficiency and installation complexity.
One refrigeration system provides both heating and cooling. Angi's August 2026 national heat-pump data is $4,237–$7,943.
Wide range because the number of indoor zones changes the project dramatically. Most useful where central duct distribution is absent or where targeted zoning is desired.
These ranges overlap heavily. That is why “heat pump vs furnace” should not be decided by one national midpoint. Compare the local installed package, the home's existing ducts and electrical / fuel infrastructure, and what equipment the new system eliminates.
THE DUCTS ARE PART OF THE HVAC SYSTEM EVEN WHEN THEY ARE NOT IN THE EQUIPMENT QUOTE
A premium outdoor unit connected to weak ductwork can be an expensive partial upgrade
HomeGuide currently places new ductwork inside a full HVAC project at about $2,000–$5,000 and says duct replacement often costs $1,400–$5,600. Angi's May 2026 guide uses$2,000–$7,500 for new ductwork installation.
DOE's residential HVAC research identifies duct leakage as a major installation-performance problem.
DOE also identifies low airflow caused by undersized ducts as a recurring HVAC installation problem.
Equipment capacity is only useful if the air-distribution system can move air through the building and back to the blower.
Angi prices crawl-space duct replacement at $2,600–$7,300 in its July 2026 guide, illustrating how access changes the project.
Ask the contractor to classify the ducts as “reuse as-is,” “seal / modify,” or “replace”—and explain why. That one sentence can account for thousands of dollars between bids.
HIGHER EFFICIENCY IS A CAPITAL PURCHASE, NOT A FREE UPGRADE
Compare the premium with the expected savings in your climate and utility rates
Angi's current guide says increasing efficiency can add roughly$350–$1,500 per rating step in its pricing model. HomeGuide's current AC equipment data also rises from about$1,000–$4,200 for 13–14 SEER equipment to$3,700–$8,500 for 22–26 SEER equipment before the rest of the installation is considered.
DOE currently enforces different central-air-conditioner efficiency requirements by region for North, Southeast and Southwest markets.
Ask for the incremental installed premium—not only a different model number.
Use the contractor / manufacturer performance data with your climate and utility rates rather than a national generic payback.
A high-efficiency unit cannot compensate for every airflow or installation defect around it.
REPAIR OR REPLACE?
A $400 repair and a $9,000 replacement are not comparable until remaining service life enters the decision
HomeGuide currently places ordinary HVAC repair at about$150–$450. Its replacement guide suggests considering replacement when repair costs become a large share of replacement, the system is more than roughly a decade old, comfort is deteriorating or operating costs are rising.
YOUNGER SYSTEMIsolated repair often has stronger economicsespecially when the compressor / heat exchanger and the rest of the system remain healthy.
OLDER SYSTEM + MAJOR COMPONENTPrice replacement before authorizing a high-cost repairbecause another major component may not share the repaired part's new life.
REPEATED SERVICE CALLSAdd the history, not just today's invoiceto see whether repair spending is turning into a recurring capital expense.
BAD COMFORTDo not assume equipment replacement fixes a duct / envelope problemwithout diagnosing airflow and load first.
A HEAT-PUMP CONVERSION CAN MOVE COST FROM HVAC TO ELECTRICAL
Ask what electrical capacity and circuit work the new system requires before comparing it with a furnace-and-AC change-out
HomeGuide's current air-source heat-pump cost breakdown includes about$200–$500 for electrical work in an ordinary installation, while also warning that larger electrical-panel or service upgrades can add substantially more. This matters most when the existing home was built around gas heat and limited electrical capacity.
Confirm breaker size and local disconnect requirements for the selected equipment.
Replacing a furnace with an electric air handler changes the indoor equipment requirements.
Where specified, supplemental electric heat should be included in the electrical review.
Do not assume a heat-pump bid includes a panel upgrade unless the proposal says so.
THE REPLACEMENT SEQUENCE THAT PREVENTS AN EXPENSIVE BOX-SWAP
Diagnosis and design should happen before brand selection
01Define comfort problem failed equipment, high bills, humidity, noise or uneven rooms?
02Assess envelope major insulation / air-leak issues that materially affect load?
03Calculate load justify heating and cooling capacity with Manual J or equivalent.
04Audit ducts reuse, seal, resize, add returns or replace?
05Select system strategy furnace + AC, heat pump, dual fuel or ductless?
06Check infrastructure gas, electrical, condensate, refrigerant lines and controls.
07Compare efficiency tiers quantify installed premium and expected operating benefit.
08Commission verify airflow, charge / setup, controls and delivered performance.
THE HVAC SYSTEM IS A LOOP, NOT AN OUTDOOR BOX
Replacement value disappears when one part of the airflow path is ignored
This visual is deliberately lower on the page because the purchase decision is primarily economic. Its purpose is to show why equipment, ducts, room delivery and return airflow belong to the same replacement scope. DOE's residential HVAC research has repeatedly identified duct leakage, low airflow and sizing / charge problems as real installation issues.
SEVEN HVAC REPLACEMENT COST FILES
The same house can produce different defensible budgets depending on how much infrastructure survives the replacement
HomeGuide's current change-out range is$5,000–$11,000. This is the best comparison case for homeowners replacing equipment without redesigning distribution.
Angi's July 2026 range is $5,000–$12,500. Labor is around $1,500 in its model, with permits and duct changes adding separately.
HomeGuide's broad $3–$6/sq.-ft. model implies$6,000–$12,000. Use it for budgeting only; do not select tonnage from this number.
HomeGuide uses $7,000–$16,000. Angi's separate current duct-installation guide uses $2,000–$7,500, showing why duct scope can move a quote by several thousand dollars.
HomeGuide's December 2025 current guide uses$4,000–$12,000 installed. Angi's August 2026 dataset is narrower at $4,237–$7,943.
If leakage or sizing problems remain, the new equipment may inherit the old system's distribution weakness. Normalize a duct-correction option against a box-only replacement.
Compare the full new heat-pump package with furnace + AC on the same endpoint, including electrical requirements, backup heat, thermostat, duct work and removal of old equipment.
THE 14-POINT HVAC BID NORMALIZER
If these items are not aligned, the contractor totals are not comparable yet
01Load calculation — Manual J or equivalent sizing basis?
02Cooling capacity — exact tonnage / BTU and why?
03Heating capacity — furnace BTU or heat-pump heating design?
04Equipment match — outdoor unit, indoor coil / air handler / furnace combination?
05Efficiency — SEER2 / EER2 / HSPF2 or AFUE as applicable?
06Duct scope — reuse, seal, modify, resize or replace?
07Return air — any return / grille modifications included?
08Electrical — circuits, disconnect, panel / service changes?
09Gas / venting — furnace gas and vent changes where applicable?
10Refrigerant lines — reused, flushed, resized or replaced?
11Controls — thermostat, communicating controls or zoning?
12Permits / removal — permit, old equipment and refrigerant handling included?
13Commissioning — airflow, refrigerant / equipment setup and final performance verification?
14Warranty — equipment registration, labor warranty and exclusions?
The best HVAC quote is not the cheapest model number. It is the lowest defensible price for the same load, airflow, equipment match and finished comfort system.
WHY THERE IS NO “HVAC SIZE + COST” CALCULATOR HERE
Square footage can estimate a budget range; it should not select equipment capacity
HomeGuide's $3–$6 per-square-foot planning range is useful for an early budget. Turning the same input into a tonnage recommendation would be a different claim. ENERGY STAR says the contractor should determine the proper system size using Manual J or an equivalent load calculation.
A generic calculator would also miss the largest quote differences: whether ducts are reused, whether the project is a furnace + AC change-out or a heat-pump conversion, whether electrical work is required, and which efficiency tier is selected. Those are procurement decisions, not square-foot multipliers.
COMMON COST QUESTIONS
HVAC replacement cost in plain terms
How much does HVAC replacement cost in 2026?Angi's August 2026 range is $5,000–$22,000, with an average around $7,500. HomeGuide uses $5,000–$11,000 for a typical furnace-and-AC change-out.
How much does it cost to replace a furnace and AC together?Angi's July 2026 national range is $5,000–$12,500.
How much does HVAC replacement cost for a 2,000-square-foot house?HomeGuide's broad planning benchmark is $6,000–$12,000. Actual equipment capacity should still be based on a load calculation.
How much does a new HVAC system with ductwork cost?HomeGuide currently uses $7,000–$16,000. Angi's current standalone new-ductwork range is $2,000–$7,500.
How much does a central AC replacement cost?Angi currently uses $3,900–$7,900. HomeGuide's current standard-efficiency guide uses $5,000–$8,300.
How much does a gas furnace replacement cost?Angi uses $3,800–$10,000; HomeGuide's current gas-furnace guide uses $3,800–$12,000.
How much does an air-source heat pump cost?HomeGuide currently uses $4,000–$12,000 installed. Angi's August 2026 national data uses $4,237–$7,943.
Should I replace my ducts when replacing HVAC?Not automatically. HomeGuide recommends a change-out only where existing ductwork is in excellent condition. Have the contractor assess leakage, sizing and airflow before deciding.
Should I buy a bigger HVAC system?Not without load evidence. ENERGY STAR explicitly says bigger is not better and recommends proper sizing using Manual J or an equivalent method.
METHODOLOGY & SOURCES
Current 2026 cost data separated from equipment-sizing and installation-performance guidance
Pricing was reviewed August 9, 2026. Angi's August 3 national HVAC update is the primary current market reference. HomeGuide provides independent change-out, ductwork, 2,000-square-foot and component benchmarks. ENERGY STAR is used for sizing guidance. DOE sources are used for duct / airflow performance and current equipment-standard context.
$5,000–$22,000 range; ~$7,500 average; current AC, furnace, heat-pump, labor, sizing and add-on cost data.
02 · ANGI · JUL 9 2026Furnace + AC Replacement Cost$5,000–$12,500 combined replacement; labor and system-type context.
03 · HOMEGUIDE · CURRENT GUIDEHVAC System Cost$5,000–$11,000 change-out; $7,000–$16,000 with ductwork; $6,000–$12,000 2,000-sq.-ft. planning benchmark; permits and labor.
04 · HOMEGUIDE · DEC 2025 CURRENT GUIDEAir-Source Heat Pump Cost$4,000–$12,000 installed; size, labor, electrical, permit and duct-modification context.
05 · ENERGY STAR · CURRENTAir-Source Heat Pump Home Upgrade GuidanceProper sizing, Manual J recommendation and warning that oversized / undersized equipment harms performance and comfort.
06 · U.S. DOE · RESIDENTIAL HVAC RESEARCHResidential HVAC Installation PracticesDocumented installation issues including duct leakage, refrigerant undercharge, oversized equipment and low airflow from undersized ductwork.
07 · U.S. DOE · CURRENTRegional Central AC StandardsCurrent North, Southeast and Southwest regional enforcement framework for residential central air-conditioner efficiency requirements.
This is U.S. cost-planning information. HVAC sizing, equipment matching, refrigerant handling, electrical work, combustion / venting, ducts, permits and minimum efficiency requirements vary by system and jurisdiction. A qualified local HVAC contractor should perform the required load and installation design before equipment is purchased.