How much does it cost to replace a central air conditioning unit?

Central AC replacement costs $3,500–$7,500 for a standard 2,000–2,500 sq ft home, including the unit and installation. High-efficiency models (SEER2 18+) run $6,000–$12,000. The price varies by region, existing ductwork condition, and whether you are replacing the whole system or just the outdoor condenser.

Is a heat pump cheaper than a central air and furnace system?

Heat pump equipment costs $4,000–$10,000 installed, similar to or slightly above a central AC-plus-gas-furnace combination. However, heat pumps operate at 200–300% efficiency compared to electric resistance heating, typically reducing annual energy bills by $400–$900 in moderate climates — making the lifetime cost often lower despite similar upfront pricing.

How long does HVAC installation take?

A standard AC or furnace replacement takes 4–8 hours for a technician team. A full system replacement covering the outdoor unit, air handler, coil, and line set typically takes one to two days. Ductwork repairs or replacements add one to three additional days depending on scope and accessibility.

Can a general contractor manage HVAC replacement?

General contractors typically hire licensed HVAC subcontractors to perform the actual work, which is code-required in most states. If HVAC replacement is one piece of a broader renovation, coordinating through a GC makes sense. For a standalone HVAC project, hiring a licensed HVAC contractor directly is usually faster and cheaper.

What is the most expensive part of HVAC replacement?

The equipment — outdoor condenser, indoor air handler, and evaporator coil — represents 50–65% of total replacement cost. Labor runs $1,500–$3,500 depending on system complexity and region. Existing ductwork in poor condition is the largest unexpected cost driver, adding $2,000–$10,000 when replacement or sealing is needed.

HVAC Replacement Cost Guide 2026: What Homeowners Actually Pay

June 29, 2026 · Cost Guide · 5 min read

HVAC replacement costs $4,000–$12,000 for most homes, depending on system type, home size, and region. Central air conditioning runs $3,500–$7,500 installed; heat pumps cost $4,000–$10,000; gas furnaces run $2,500–$6,500; and full system replacements covering all three components range from $8,000–$18,000. Ductwork is the wildcard — if yours needs replacement, add $3,000–$10,000 to any of these figures.

HVAC Cost by System Type

Central Air Conditioning

Central AC replacement — the outdoor condenser, indoor evaporator coil, and refrigerant — costs $3,500–$7,500 installed for a standard home. Higher-efficiency systems (SEER2 18 or above) push into the $6,000–$12,000 range. The SEER2 minimum for new equipment in 2026 is 14 in northern states and 15 in southern states, which means all replacements today represent genuine efficiency upgrades over older units.

Under 1,200 sq ft (1.5–2 tons): $3,200–$4,800 mid-efficiency; $5,500–$7,000 high-efficiency
1,200–2,000 sq ft (2–3 tons): $4,200–$6,000 mid-efficiency; $6,500–$9,000 high-efficiency
2,000–3,000 sq ft (3–4 tons): $5,500–$7,500 mid-efficiency; $8,500–$12,000 high-efficiency
Over 3,000 sq ft (4–5 tons): $7,000–$10,500 mid-efficiency; $11,000–$16,000 high-efficiency

Gas Furnaces

Gas furnace replacement costs $2,500–$6,500 installed, depending on efficiency rating. Standard 80% AFUE models run $2,500–$4,000. High-efficiency 96–98% AFUE condensing furnaces cost $4,000–$6,500 — they add a second heat exchanger and exhaust through the wall rather than a chimney. The efficiency gap translates to $150–$400 per year in gas savings depending on local rates and climate, typically paying back the cost difference in 5–8 years.

Heat Pumps

Heat pumps both cool and heat using the same refrigerant-based system, making them a single-unit replacement for both furnace and AC. Standard split-system heat pumps cost $4,000–$8,500 installed. Cold-climate heat pumps rated to operate efficiently at temperatures as low as -13°F run $5,000–$10,000. They deliver 2–3 units of heat energy for every 1 unit of electrical energy consumed, which is why operating costs run significantly lower than gas or electric resistance in moderate climates. In 2026, the federal Inflation Reduction Act heat pump tax credit provides up to $2,000 back on qualifying installations.

Mini-Split Systems (Ductless)

Single-zone mini-splits cost $2,000–$5,000 installed per zone and are ideal for room additions, garages, or homes without existing ductwork. Multi-zone systems serving three to five areas cost $6,000–$14,000. They operate 20–30% more efficiently than ducted central systems but have higher per-zone equipment costs, making them best suited for targeted applications rather than whole-home primary systems.

What Actually Drives the Price

Ductwork condition — the biggest wildcard

Unsealed or deteriorating ducts can lose 25–40% of conditioned air before it reaches living spaces, which means a new HVAC unit installed on failing ductwork operates at a fraction of its rated efficiency. Duct sealing costs $300–$1,000. Full duct replacement costs $2,000–$10,000 depending on home size and accessibility. Many reputable contractors will not warranty a new system installed on failing ductwork — so if yours needs work, expect to hear this up front. This is the most common source of project cost surprises in HVAC replacements.

Refrigerant type

Systems manufactured before 2020 used R-22 refrigerant, now phased out and no longer manufactured. Older R-22 systems cannot be refilled economically and must be replaced entirely when they develop leaks. New systems use R-410A or the newer R-454B refrigerant. If you are repairing an older system with an R-22 leak, full replacement almost always makes financial sense over repair.

Regional labor markets

HVAC installation labor ranges from $75–$150 per hour and varies sharply by geography. Labor in high-cost metros runs 30–50% above national averages. Labor in lower-cost markets runs 10–25% below. The same system that installs for $4,500 in one Midwest city can cost $6,800 in a coastal metro. Browse local contractors by city to get a sense of your specific market's rates before budgeting.

Permit and inspection fees

Most jurisdictions require a permit for HVAC replacement ($75–$350) and a final inspection confirming code compliance. Any contractor who suggests skipping permits is transferring legal and insurance risk to you — homeowner's insurance can deny claims related to work not done under permit. Our guide on permit requirements by project type explains what is typically required and how the permit process works.

Repair vs. Replace: How to Decide

The standard industry heuristic is the 5,000 rule: multiply the age of the unit (in years) by the repair cost (in dollars). If the result exceeds $5,000, replacement is usually the better investment.

A 12-year-old system needing a $350 capacitor: 12 × 350 = $4,200. Repair.
A 15-year-old system needing a $600 compressor repair: 15 × 600 = $9,000. Replace.
A 10-year-old system with a leaking coil needing $800 in refrigerant and work: 10 × 800 = $8,000. Replace — and the coil will likely leak again.

HVAC systems typically last 15–20 years for central AC, 18–25 years for furnaces, and 15–20 years for heat pumps. Systems approaching end of life that need significant repairs rarely justify the investment over replacement.

How to Get Accurate Bids

Get at least three bids. Give each contractor the same scope: current system specs (tonnage, SEER, fuel type), known issues (ductwork problems, refrigerant history), and the desired outcome (equivalent replacement or efficiency upgrade). Comparing bids with different equipment specifications is meaningless — ask each contractor to specify the manufacturer, model number, and SEER2 or AFUE rating in writing so you are comparing equivalent proposals.

Before signing any contract, confirm what a complete agreement must include. Our guide on what every renovation contract must include covers the warranty language, exclusion clauses, and payment structure that should be explicit in any HVAC agreement. Reputable HVAC contractors do not require full payment upfront — standard structure is 10–20% deposit and the balance on completion. For larger renovation projects where HVAC is one component, see our guide on contractor payment schedules.

Find top-rated contractors near you who manage HVAC and mechanical system replacements as part of broader renovation work.

2026 Incentives and Rebates

Federal tax credits cover 30% of equipment and installation costs for qualifying heat pumps, up to $2,000 per year under the Inflation Reduction Act's 25C energy efficiency credit. High-efficiency central AC systems may qualify for up to $600. Many utility companies add their own rebates — common utility rebates run $100–$500 for heat pumps and $50–$200 for high-efficiency furnaces. Check your utility's website and the ENERGY STAR rebate finder before purchasing any system, as these incentives change regularly and vary significantly by region.

Budget Summary for 2026

Minimum realistic budget: $3,500 (single-zone mini-split or furnace only in a small home with good existing ductwork)
Average full replacement: $5,500–$8,500 (standard central AC plus furnace in a 1,500–2,500 sq ft home)
Full system with ductwork: $10,000–$20,000
High-efficiency heat pump after federal tax credit: $4,000–$8,000 effective cost

Frequently Asked Questions

How much does it cost to replace a central air conditioning unit?: Central AC replacement costs $3,500–$7,500 for a standard 2,000–2,500 sq ft home, including the unit and installation. High-efficiency models (SEER2 18+) run $6,000–$12,000. The price varies by region, existing ductwork condition, and whether you are replacing the whole system or just the outdoor condenser.
Is a heat pump cheaper than a central air and furnace system?: Heat pump equipment costs $4,000–$10,000 installed, similar to or slightly above a central AC-plus-gas-furnace combination. However, heat pumps operate at 200–300% efficiency compared to electric resistance heating, typically reducing annual energy bills by $400–$900 in moderate climates — making the lifetime cost often lower despite similar upfront pricing.
How long does HVAC installation take?: A standard AC or furnace replacement takes 4–8 hours for a technician team. A full system replacement covering the outdoor unit, air handler, coil, and line set typically takes one to two days. Ductwork repairs or replacements add one to three additional days depending on scope and accessibility.
Can a general contractor manage HVAC replacement?: General contractors typically hire licensed HVAC subcontractors to perform the actual work, which is code-required in most states. If HVAC replacement is one piece of a broader renovation, coordinating through a GC makes sense. For a standalone HVAC project, hiring a licensed HVAC contractor directly is usually faster and cheaper.
What is the most expensive part of HVAC replacement?: The equipment — outdoor condenser, indoor air handler, and evaporator coil — represents 50–65% of total replacement cost. Labor runs $1,500–$3,500 depending on system complexity and region. Existing ductwork in poor condition is the largest unexpected cost driver, adding $2,000–$10,000 when replacement or sealing is needed.