Average AC Unit Replacement Cost
Replacing a central air conditioning unit typically costs $4,500 to $12,000, depending on system size, efficiency rating, and installation complexity.
Homes with larger cooling needs or ductwork modifications may see higher costs.
Homeowners often begin by reviewing overall HVAC replacement cost before comparing specific system types.
AC Replacement Cost by Unit Size
| AC Size | Typical Cost Installed |
|---|---|
| 1.5 ton | $4,500 – $7,000 |
| 2 ton | $5,000 – $8,000 |
| 3 ton | $6,000 – $10,000 |
| 4 ton | $7,500 – $11,000 |
| 5 ton | $9,000 – $12,000 |
The correct unit size depends on square footage, insulation, and climate.
Factors That Affect AC Replacement Cost
System size – Larger homes require larger systems.
Energy efficiency (SEER rating) – Higher efficiency units cost more upfront but reduce energy use.
Ductwork condition – Damaged or undersized ducts may increase installation costs.
When AC Replacement Is Recommended
Replacement may be necessary when:
- the unit is 10–15 years old
- frequent repairs are needed
- cooling performance has declined
- energy bills are rising significantly
FAQ
How much does it cost to replace a central AC unit?
Most homeowners pay $5,000 to $10,000 depending on unit size and installation factors.
How long do AC units last?
Central air systems usually last 10–15 years with proper maintenance.
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