How Much Does a New AC Unit Cost?
A new central AC unit costs $3,500-$9,000 installed. See 2026 pricing by tonnage, brand, and efficiency rating.
If your air conditioner is over 12 years old or struggling to keep up, replacement is usually more cost-effective than repair. Here are installed costs for central AC units in 2026.
Regional Cost Snapshot
See how local labor rates, storm risk, and climate data affect HVAC costs where you live. Example: Travis County, TX — see the full county guide.
Cost Breakdown
2-Ton Unit (1,000-1,500 sq ft)
3-Ton Unit (1,500-2,000 sq ft)
4-Ton Unit (2,000-2,500 sq ft)
5-Ton Unit (2,500-3,500 sq ft)
What Affects the Cost?
Unit Size (Tons)
A Manual J load calculation determines the right tonnage. Undersized units run constantly; oversized units short-cycle and waste energy.
SEER Rating
Minimum efficiency is 15 SEER (2023+ regulation). Units rated 18-22 SEER cost more but save significantly on cooling bills.
Brand
Premium brands (Carrier, Trane, Lennox) cost 20-40% more than value brands (Goodman, Rheem) with comparable warranties.
Installation Complexity
Tight access, rooftop units, or relocating the condenser pad can add $500-$2,000 in labor.
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Frequently Asked Questions
How long does a central AC unit last?
Most central AC units last 15-20 years with proper maintenance. Units in hot climates may need replacement sooner.
What SEER rating should I get?
For most climates, 16-18 SEER offers the best balance of upfront cost and energy savings. In very hot regions, 20+ SEER may be worth the premium.