2026 cost guide
HVAC replacement cost in 2026
By the HeatAndAirCost editors · Last updated September 1, 2026 · How we research prices
Short answer
A full HVAC system replacement costs $5,000 to $12,000 for a typical 2,000 sq ft home when reusing existing ductwork[1]. Adding new ductwork pushes the range to $7,000 to $16,000[2]. As a rule of thumb, budget $3 to $6 per square foot installed for a furnace and AC together.
HVAC replacement cost by system type
These are researched 2026 ranges, not quotes. Actual cost depends on your home size, system choice, and local labor market.
| System | Typical 2026 range | Notes |
|---|---|---|
| Central AC + gas furnace (2,000 sq ft), reuse ducts | $5,000–$11,000 | Most common change-out |
| Full system with new ductwork | $7,000–$16,000 | Adds 3 to 5 days |
| Heat pump system (all-electric) | $6,000–$20,000 | See our heat pump page |
| Per square foot, installed | $3–$6/sq ft | Furnace + AC + labor |
| New ductwork only | $25–$55/linear ft | Crawlspace, attic, or basement |
What moves the price
- System size and tonnage. Larger homes need bigger, more expensive equipment[1].
- Efficiency rating (SEER2/AFUE). High-efficiency equipment costs more upfront but saves on utility bills.
- Ductwork condition. Reusing existing ducts saves $2,000 to $5,000 or more versus a full replacement[1].
- Furnace vs heat pump. All-electric heat pumps often cost more but may qualify for rebates.
- Local labor rates. Rates vary widely by region.
- Add-ons. Smart thermostat, zoning system, and permits all add to the final bill.
Furnace and AC together
Replacing both units at once usually makes more sense than doing them separately: one visit, one set of permits, and matched efficiency. For furnace-only pricing, see our furnace replacement cost page, and use the $5,000 rule to decide whether replacement beats a costly repair.
When to repair instead
If your system is under 10 years old and the repair is modest, replacement may not be needed yet. Our furnace repair cost guide and $5,000 rule calculator help you decide.
People also ask
HVAC replacement FAQs
How much is a new HVAC system for a 2000 square foot house?
A new HVAC system for a 2,000 square foot home typically costs $5,000 to $12,000 when reusing existing ductwork, and $7,000 to $16,000 when new ductwork is included. The wide range reflects system type, efficiency level, and local labor. Expect about $3 to $6 per square foot as a rule of thumb.
What is the average lifespan of a HVAC?
Most central air conditioners and gas furnaces last 15 to 20 years with proper maintenance. Heat pumps typically run 10 to 15 years. A unit approaching the end of its expected lifespan is often better replaced than repeatedly repaired, especially when major components start failing.
Is it cheaper to replace furnace and AC together?
Yes, replacing a furnace and AC at the same time usually costs less than two separate jobs. You pay for one service call, one set of permits, one installation crew, and matched equipment that is designed to work together. Splitting the jobs means paying mobilization costs twice.
What is the $5,000 rule for HVAC?
Multiply the system's age in years by the repair quote. If the result is over $5,000, replacement usually makes more financial sense; under $5,000, repair. A $500 repair on a 12-year-old system scores 6,000 (lean toward replacement). See the full breakdown on our $5,000 rule guide.
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See if it's a fair price
Compare your quote against the ranges above, then get free quotes from independent, licensed HVAC contractors when you're ready.