HVAC Replacement Cost Calculator (2026)
Estimate what a new HVAC system costs by system type, home size and state. Nationally, a full system runs $6,000–$20,000 installed.
What are you replacing?
Cost by material / system
| Option | Low | High |
|---|---|---|
| Central AC only | $3,500 | $8,500 |
| Furnace only | $3,000 | $8,000 |
| Heat pump | $5,500 | $15,000 |
| Full system (AC + furnace) | $6,500 | $20,000 |
| Full system + ductwork | $9,000 | $28,000 |
What drives the price
System type, home square footage, duct condition and refrigerant rules drive most of the price. A 2,000 sq ft home typically needs 3–4 tons of cooling; older ductwork adds $2,000–$6,000.
Cost by state
Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming District of Columbia
FAQ
How much does HVAC replacement cost?
A central AC-only replacement runs $3,500–$8,500. A full system with furnace and AC is $6,500–$20,000. Heat pumps sit in between and may qualify for rebates.
What is the most expensive part?
The outdoor condenser and the air handler, plus any ductwork changes. Duct replacement is often the single largest surprise line item.
How long does installation take?
Most residential replacements are done in one day; full ductwork can take 2–4 days.