How Much Does AC Replacement Cost?
Replacing a central air conditioner is a significant investment. Prices vary widely based on system size, efficiency rating, brand, and local labor rates. This guide breaks down what you should expect to pay and how to evaluate quotes.
AC Replacement Cost Overview (2026)
Costs include equipment and installation labor. Regional labor rates, home-specific factors, and ductwork condition all affect the final price.
What Drives AC Replacement Costs
- System size (tonnage): A 2-ton system costs less than a 5-ton system. Most homes need 2-4 tons. Proper sizing requires a Manual J calculation -- an oversized system is a waste of money and causes comfort problems.
- SEER2 efficiency rating: Higher efficiency costs more upfront but saves on monthly energy bills. Calculate payback period based on your local electricity rate and annual run-time.
- Brand: Premium brands (Carrier, Lennox, Trane) cost more than value brands (Goodman, Day & Night). Both can be reliable when properly installed and maintained.
- Ductwork condition: If existing ductwork needs repair, resizing, or replacement, add $1,000-$5,000+ depending on scope.
- Local labor rates: Markets vary significantly. Urban areas with high labor costs may run $500-$1,500 more than rural areas for identical equipment.
- Permits and inspections: Required in most jurisdictions. Add $150-$500 for permits -- avoid any contractor who suggests skipping them.
How to Get an Accurate Quote
Get 3 written quotes minimum. A good quote includes: equipment model number and SEER2 rating, tonnage and the basis for sizing (Manual J or measured assessment), labor and parts warranty terms, permit fees, and any ductwork work required. If a quote does not include the model number, ask -- vague quotes make comparison impossible.
Frequently Asked Questions
- What is the average cost to replace a central AC unit?
- The average installed cost for a central AC replacement is $4,500-$7,500 for most homes, with a standard efficiency 3-ton system. High-efficiency models or larger homes cost $7,000-$12,000. Always get 3 written quotes to validate pricing in your local market.
- How long does AC installation take?
- A standard AC replacement takes 4-8 hours for an experienced crew. If ductwork modifications are needed, add a day or more. Most contractors schedule replacement jobs for a single day.
- Is it better to repair or replace an old AC?
- Replace when the system is over 12 years old and needs a major repair, uses R-22 refrigerant, or when repair cost exceeds 50% of replacement cost. See our repair vs. replace guide for the full framework.
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