Hey there, Jake Lawson here. If you’re in the market for a new air conditioner, you’ve probably seen the name Lennox pop up multiple times. Known for their reliability, efficiency, and wide range of HVAC options, Lennox systems are a popular choice for homeowners. But with so many models, sizes, and features, it’s understandable if you’re asking: “How much is a Lennox air conditioner?” or “What’s the cost of a Lennox HVAC system?”
In this comprehensive guide, I’m going to break down Lennox AC pricing, explain the differences between models, cover installation considerations, and give you an idea of the total furnace and AC replacement cost. Whether you’re considering a 3-ton Lennox unit for your average home or a 5-ton 3-phase system for larger spaces, this guide has everything you need to know to make an informed decision.
💰 Lennox Air Conditioner Prices: A Detailed Overview
Lennox offers a wide range of models that vary in efficiency, capacity, and features. Here’s a breakdown of the most popular Lennox air conditioners and their estimated costs:
1. Lennox ML17XC1
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SEER Rating: Up to 18
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Price Range: $3,000 – $4,500
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Description: The ML17XC1 is a single-stage air conditioner. It offers consistent cooling and reliable performance without a hefty price tag. This is a great option for homeowners looking for a balance between cost and energy efficiency.
2. Lennox EL17XC1
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SEER Rating: Up to 18.6
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Price Range: $4,000 – $6,000
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Description: This is a mid-efficiency single-stage unit that offers quieter operation and improved energy savings. It’s ideal for homeowners who want enhanced comfort and efficiency without moving to a premium tier.
3. Lennox XC20
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SEER Rating: Up to 22
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Price Range: $5,000 – $7,000
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Description: The XC20 is a variable-capacity air conditioner that can adjust cooling output based on your needs. It offers precise temperature control and superior energy efficiency. (Lennox Official Product Page)
4. Lennox XC21
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SEER Rating: Up to 21
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Price Range: $6,000 – $8,000
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Description: A high-efficiency, multi-stage air conditioner, the XC21 provides excellent humidity control and consistent home comfort. It’s one of the most popular Lennox units for homeowners looking for long-term energy savings.
5. Lennox SL28XCV
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SEER Rating: Up to 28
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Price Range: $8,000 – $12,000
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Description: Lennox’s top-of-the-line model. The SL28XCV offers variable-capacity operation, maximum energy savings, and ultra-quiet performance. Perfect for those who want the absolute best in home comfort and efficiency.
📊 Lennox Air Conditioner Cost by Size
When considering a Lennox AC unit, the size of the unit (in tons) is crucial. A properly sized unit ensures efficiency, comfort, and longevity. Here’s a general guide for typical residential units:
| Unit Size | Price Range |
|---|---|
| 2.5 Ton | $2,500 – $4,000 |
| 3 Ton | $3,000 – $5,000 |
| 3.5 Ton | $3,500 – $5,500 |
| 4 Ton | $4,000 – $6,000 |
| 5 Ton | $5,000 – $7,000 |
Note: Pricing varies depending on model, SEER rating, and whether it’s a single-stage or variable-capacity system. For more details on sizing and prices, check HVAC.com’s guide to Lennox units.
🔧 Factors That Affect Lennox AC Pricing
Several factors influence Lennox air conditioning prices, beyond just the size of the unit:
1. Efficiency (SEER Rating)
Higher SEER (Seasonal Energy Efficiency Ratio) units cost more upfront but save money on electricity bills over time. For example:
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ML17XC1: 16–18 SEER
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XC20: Up to 22 SEER
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SL28XCV: Up to 28 SEER
Higher SEER is especially worth it in hotter climates with long cooling seasons. (EnergyStar)
2. Installation Complexity
Labor costs depend on:
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Whether you’re replacing an existing unit or installing a new system
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Electrical upgrades
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Refrigerant type (R-22 vs. eco-friendly R-410A or R-32)
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Ductwork modifications
Professional installation typically ranges from $1,000 – $3,000, but it can increase for multi-story homes or difficult installations.
3. Home Size & Layout
Larger homes require more cooling capacity, usually a 4–5 ton system. Multi-level homes or homes with open floor plans may require additional zoning or ductwork, increasing overall costs.
4. Brand & Model Features
Premium models like the XC21 or SL28XCV include variable-capacity compressors, smart thermostat integration, and superior humidity control. These advanced features increase upfront costs but enhance comfort and efficiency.
🛒 Where to Buy Lennox Air Conditioners
Purchasing a Lennox unit is straightforward if you know where to look:
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Authorized Dealers: Your safest bet for warranties and professional installation.
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Online HVAC Retailers: Sites like LennoxPros provide detailed product listings and pricing.
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Home Improvement Stores: Some retailers carry Lennox units or can order them for you.
Tip: Always buy from authorized dealers to ensure warranty coverage and proper installation.
🔥 Furnace & AC Replacement Costs with Lennox
Many homeowners consider replacing both furnace and AC simultaneously. A matched Lennox system ensures maximum efficiency. Here’s what to expect:
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AC Unit: $3,000 – $8,000 (depending on size & model)
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Furnace: $3,500 – $8,500
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Installation Labor: $1,500 – $4,000
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Ductwork (if needed): $2,000 – $3,000
Total cost for a full furnace and AC replacement: $7,500 – $15,000. For more on total HVAC replacement, check Modernize HVAC Cost Calculator.
💡 Tips to Save on Lennox AC Installation
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Get Multiple Quotes – At least three estimates ensure competitive pricing.
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Schedule Off-Peak – Spring and fall are less busy than summer, often yielding discounts.
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Look for Rebates – Utility companies often provide rebates for high-efficiency Lennox systems.
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Maintain Your System – Regular service keeps your AC efficient and extends its lifespan.
📌 Popular Lennox Models and Pricing Summary
| Model | SEER | Price Range | Notes |
|---|---|---|---|
| ML17XC1 | 16–18 | $3,000 – $4,500 | Single-stage, budget-friendly |
| EL17XC1 | 18.6 | $4,000 – $6,000 | Mid-efficiency, quiet operation |
| XC20 | 22 | $5,000 – $7,000 | Variable-capacity, energy efficient |
| XC21 | 21 | $6,000 – $8,000 | Multi-stage, precise comfort |
| SL28XCV | 28 | $8,000 – $12,000 | Ultra-efficient, top-of-line |
✅ Final Thoughts
The cost of Lennox air conditioning units varies widely depending on model, efficiency, size, and installation requirements. Expect to pay between $3,000 and $12,000 for the unit itself, with installation and ductwork adding another $1,500–$5,000.
When considering a new AC system, think long-term: investing in a high-efficiency Lennox unit can save on energy bills, improve comfort, and increase home value. And if your furnace is aging, consider replacing both at the same time for a fully matched HVAC system.
For homeowners seeking a reliable, efficient system, the Goodman 3-Ton 14.5 SEER2 R32 Bundle is a great alternative to consider alongside Lennox, offering excellent value and efficiency.
