If your energy bills are climbing or your old air conditioner is struggling to keep up, it might be time to ask that big question: how much does it cost to replace an air conditioning unit?
For homeowners like me who love staying comfortable but hate overpaying, understanding what goes into a new AC unit cost is key. Whether you’re exploring a 5-ton air conditioning unit for a large home or looking into a 3-ton central air system like Goodman’s 3 Ton 14.5 SEER2 R-32 Bundle, knowing how size, efficiency, and installation affect price helps you make an informed decision.
Let’s break it all down — from average prices to hidden costs, and even how to save money on your next central air replacement.
Understanding the Cost to Replace an AC Unit
Before you dive into shopping, it’s important to realize that the cost to replace an AC unit varies widely depending on several factors:
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System size (measured in tons)
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Efficiency rating (SEER2 value)
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Brand and model
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Installation complexity
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Local climate and labor rates
In 2025, homeowners typically pay between $4,500 and $12,000 for a full central AC replacement. Smaller 2-ton systems may start around $3,800, while high-efficiency 5-ton central air units can climb beyond $10,000, especially if ductwork or electrical upgrades are needed.
To put it in perspective: the average AC replacement cost across the U.S. sits at about $7,500, according to Modernize’s latest HVAC cost guide.
How Much Does a New AC Unit Cost?
Let’s look closer at the new AC unit cost based on capacity:
| AC Size (Tons) | Cooling Area (Sq. Ft.) | Estimated Cost Range (System + Install) |
|---|---|---|
| 2 Ton AC Unit | 900–1,200 sq. ft. | $3,800–$6,000 |
| 3 Ton Air Conditioner | 1,300–1,800 sq. ft. | $4,500–$7,500 |
| 4 Ton AC System | 1,800–2,400 sq. ft. | $5,000–$8,500 |
| 5 Ton Air Conditioning Unit | 2,400–3,000 sq. ft. | $6,000–$12,000 |
Keep in mind that these prices include installation, refrigerant, and labor, but not necessarily duct repair or thermostat upgrades.
If you’re replacing an older unit, you may also need to update to an A2L refrigerant like R-32, which is both environmentally friendly and more energy-efficient. Systems like the Goodman bundle mentioned above use R-32 instead of outdated R-410A refrigerant, offering cleaner cooling and future-proof technology.
What Influences the Price of a New AC System?
When you research how much a new AC costs, it’s not just about the sticker price. A few hidden variables affect your total spend:
1. System Type
Central air systems are the most common, but they’re not the only choice. You might consider:
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Split systems (indoor coil + outdoor condenser)
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Packaged systems (common in larger homes or commercial use)
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Heat pump systems (for heating and cooling efficiency)
Central air is the most popular, but a 5-ton air conditioning unit in a split setup is usually more efficient and easier to service than a package unit.
2. Efficiency Rating
Higher efficiency equals higher upfront cost — but lower utility bills. The new SEER2 ratings are designed to reflect real-world energy performance. A 14.5 SEER2 model, like the Goodman R-32 system, balances affordability and efficiency for most homes.
For reference, AHRI’s SEER2 standards highlight how higher efficiency units save hundreds annually in electricity costs.
3. Installation Labor
The price to replace a central air conditioner can double once installation labor and materials are factored in. Complex duct runs, electrical work, or removing old equipment all add up.
4. Refrigerant Type
New regulations have phased out older refrigerants like R-22 and R-410A in favor of low-GWP alternatives such as R-32. This makes your system more environmentally responsible — and avoids future supply shortages.
5. Home Size and Insulation
Even the best AC can’t perform efficiently in an under-insulated home. Proper sealing, ductwork, and insulation can improve comfort and help you choose the right system size — saving you from overspending on a larger unit.
Central Air Unit Cost: What to Expect in 2025
The central air unit cost you’ll pay in 2025 depends on where you live. Hotter regions like Texas, Arizona, and Florida see higher demand, which can raise installation costs.
Here’s a breakdown of average central AC prices in different regions:
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Southeast U.S. – $6,000–$9,500
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Midwest – $5,000–$8,000
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Northeast – $5,500–$9,000
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West Coast – $7,000–$11,000
If you’re replacing an older system, now is a smart time to upgrade to a modern R-32 model before labor and refrigerant costs increase again next summer.
For comparison, the HomeAdvisor HVAC cost guide shows that homeowners recoup long-term savings through energy efficiency upgrades and improved indoor comfort.
How Much Does It Cost to Replace a Central Air Conditioner?
If your AC is more than 10–15 years old, replacing it with a new central air unit may actually save money.
The cost to replace a central air unit typically ranges from $4,500 to $12,000, depending on size and efficiency. That includes both the condenser (outside unit) and air handler (inside unit).
A 5-ton air conditioner — often needed for larger homes — generally costs $6,500 to $10,000 installed, while a smaller 3-ton system might land around $4,500 to $7,500.
You can get a more accurate estimate by checking with professional installers and comparing quotes. Be sure to confirm they’re familiar with R-32 refrigerant systems, as not all technicians are trained to handle the new generation of refrigerants safely.
How Much Does It Cost to Install Central AC?
The installation cost itself usually makes up 40–50% of your total bill. That includes:
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Labor for setup and testing
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Mounting the outdoor condenser
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Connecting refrigerant lines
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Running electrical wiring
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Testing airflow and system balance
For most homeowners, installation alone costs between $2,500 and $6,000, depending on system size and home layout.
According to Angi’s HVAC installation guide, energy-efficient systems with inverter compressors and R-32 refrigerant often carry slightly higher installation costs but deliver significantly better long-term savings.
How to Save on a New AC System
Here’s how savvy homeowners can lower their new AC system cost:
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Shop offseason.
Spring and fall are typically cheaper for installation than peak summer months. -
Look for rebates and tax credits.
Many ENERGY STAR® certified systems qualify for federal energy rebates under the Inflation Reduction Act. Check your eligibility through Energy Star’s rebate finder. -
Choose the right size.
Bigger isn’t always better. Oversized units short-cycle, waste energy, and wear out faster. -
Upgrade your thermostat.
Smart thermostats maximize efficiency, especially when paired with variable-speed systems. -
Get multiple quotes.
Comparing two or three licensed contractors ensures you’re getting a fair price to replace your air conditioning unit.
Should You Go with a 3-Ton or 5-Ton Air Conditioning Unit?
Here’s a quick comparison for homeowners deciding between a 3-ton and 5-ton system:
| Feature | 3-Ton Unit | 5-Ton Unit |
|---|---|---|
| Cooling Capacity | ~36,000 BTUs | ~60,000 BTUs |
| Ideal Home Size | 1,200–1,800 sq. ft. | 2,400–3,000 sq. ft. |
| Estimated Cost | $4,500–$7,500 | $6,000–$12,000 |
| Energy Use | Moderate | High |
| Best Use | Mid-size homes | Large homes or light commercial use |
If your home is under 2,000 square feet, a 3-ton central air system like the Goodman 14.5 SEER2 R-32 bundle offers the perfect balance of affordability and performance. For larger homes or multi-zone layouts, a 5-ton air conditioner provides more powerful cooling, but at a higher operational cost.
The Bottom Line: What You Should Budget
When budgeting for your new air conditioning system, consider the total package — not just the unit price:
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AC Unit Cost: $4,000–$8,000
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Installation & Labor: $2,500–$6,000
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Permits & Ductwork (if needed): $500–$2,000
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Smart Thermostat Upgrade: $200–$400
That brings most total system replacements to $6,000–$12,000 — depending on size, efficiency, and customization.
If you’re upgrading from an older refrigerant or installing new ductwork, plan on the higher end. But remember: a properly installed, energy-efficient system can reduce your cooling costs by up to 30% per year.
Final Thoughts from Savvy Mavi
Replacing your central air system isn’t just about cost — it’s about comfort, efficiency, and peace of mind.
The right 5-ton HVAC unit or 3-ton air conditioning system can transform your indoor comfort while saving energy for years to come. And with next-generation R-32 refrigerant and SEER2 efficiency standards, today’s systems are cleaner, quieter, and smarter than ever before.
If you’re ready to explore options, start by checking out the Goodman 3 Ton 14.5 SEER2 R-32 Bundle at The Furnace Outlet. It’s a fantastic baseline for comparing pricing, capacity, and performance across modern central air systems — so you know exactly what to expect when it’s time to invest in a new AC unit.
