Central Air Installation Cost Calculator
Get an accurate estimate for installing central air conditioning based on your home size, climate, and efficiency needs.
How It Works
Enter home size
Square footage determines the tonnage needed — typically 1 ton per 400–600 sq ft.
Select SEER rating
Higher SEER ratings cost more upfront but qualify for federal tax credits.
Get your estimate
Receive a cost range including the unit, coil, refrigerant, and installation labor.
2026 Central AC Installation Costs by Size
| Home Size | Tonnage | Installed Cost |
|---|---|---|
| Under 1,200 sq ft | 1.5–2 tons | $1,400 – $3,500 |
| 1,200 – 1,800 sq ft | 2–2.5 tons | $1,800 – $4,500 |
| 1,800 – 2,400 sq ft | 2.5–3 tons | $2,200 – $5,500 |
| 2,400 – 3,000 sq ft | 3–3.5 tons | $2,800 – $7,000 |
| Over 3,000 sq ft | 4–5 tons | $3,500 – $9,000 |
Frequently Asked Questions
How much does central air conditioning installation cost?
Central air conditioning installation costs $2,200–$7,500 depending on home size, SEER rating, and whether existing ductwork is in good condition. A standard 3-ton AC system for a 1,800 sq ft home costs $3,000–$5,500 installed. High-efficiency (20+ SEER) systems cost more upfront but qualify for federal tax credits and lower operating costs.
What SEER rating should I choose?
SEER (Seasonal Energy Efficiency Ratio) measures cooling efficiency — higher is more efficient. The federal minimum is 14 SEER (13 SEER in the North). 16–18 SEER is the sweet spot for most homes — better efficiency without a huge premium. 20+ SEER qualifies for federal tax credits. In hot climates where AC runs most of the year, higher SEER ratings pay back faster.
Can I add central air to a house without ductwork?
Yes — two main options: (1) Install ductwork ($3,000–$10,000 for most homes), which is the most cost-effective for whole-home cooling if the home can accommodate ducts. (2) Install a ductless mini-split system ($2,000–$10,000 for multiple zones), which avoids ductwork entirely. Mini-splits are more efficient but have higher per-unit costs for whole-home solutions.
What tax credits are available for central AC?
The Inflation Reduction Act provides a 30% federal tax credit up to $600 for central air conditioners meeting efficiency requirements (typically 16 SEER2 or higher). Heat pump AC systems qualify for a larger $2,000 credit. Some states and utilities offer additional rebates. Credits apply to installation costs and are claimed on your federal tax return.
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Answer 5 questions for a cost range tailored to your home and climate.
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