If you’re a homeowner shopping for an air conditioner, you’ve probably wondered: “How much is a Lennox air conditioner?” or “What’s the cost of Lennox AC units?” With so many models, sizes, and efficiency ratings, pricing can feel confusing. From 3 ton Lennox AC unit prices to 5 ton AC 3 phase Lennox systems, knowing what to expect helps you plan and budget smarter.
I’m Mike Sanders. After 20 years in HVAC, I’ve installed hundreds of Lennox systems and have worked with countless homeowners comparing brands, prices, and performance. In this post, I’ll break down the cost of Lennox air conditioning units, how pricing is determined, and why sometimes a modern system like the Goodman 3 Ton 14.5 SEER2 R-32 Bundle can give you great value without compromising comfort.
🔍 Understanding Lennox Air Conditioner Prices
Lennox is known for efficiency, reliability, and premium comfort. However, that reputation comes at a price. Lennox air conditioning prices vary depending on:
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Unit size (tonnage) – 1 ton roughly cools 600 square feet. Larger homes require bigger units, like 4 ton or 5 ton AC units.
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Efficiency rating (SEER) – Higher SEER means more energy savings, but also higher upfront cost.
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System type – Split systems, packaged units, or ultimate comfort systems all differ in price.
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Installation complexity – Labor, ductwork modifications, and electrical requirements impact the total.
For reference, the Lennox ML17XC1 air conditioner price is typically lower than top-tier Lennox models like the XC20 or XC21, which are highly efficient and come with advanced features.
💰 Average Cost of Lennox Air Conditioners
Here’s what homeowners typically pay for Lennox units:
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3 ton Lennox AC unit price: $3,500–$6,500 installed
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4 ton Lennox AC unit price (including 16 SEER models): $4,500–$7,500 installed
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5 ton AC 3 phase Lennox: $6,500–$10,000 installed
These prices cover both equipment and labor. Of course, the cost of Lennox air conditioning units can vary by region, dealer, and any additional features you choose.
For a deeper dive into pricing by model, check HVAC.com Lennox Pricing Guide for a clear breakdown of equipment costs and average installation expenses.
🏠 What Determines Lennox AC Unit Cost?
Several factors influence how much does a Lennox AC unit cost:
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Model and Efficiency
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ML17XC1 – Mid-efficiency, good for homeowners looking for balance between cost and energy savings.
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EL16XC1 – Higher SEER (16) with better energy efficiency.
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XC20 / XC21 – Ultimate comfort systems with SEER ratings up to 21, variable-speed compressors, and quiet operation.
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Tonnage / Size
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3 ton AC: Suitable for 1,800–2,200 sq. ft. homes.
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4 ton AC: Covers 2,400–2,800 sq. ft.
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5 ton AC 3 phase Lennox: For 3,000+ sq. ft., usually commercial or large residential homes.
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Installation Complexity
Labor can add $1,500–$3,500 to total Lennox air conditioner cost, depending on ductwork modifications, electrical upgrades, and accessibility.
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Additional Features
Advanced thermostats, zoning systems, or filtration options can increase total Lennox AC unit prices.
🔧 Typical Lennox AC Pricing by Model
| Model | SEER Rating | Size | Estimated Cost Installed |
|---|---|---|---|
| ML17XC1 | 17 | 3 ton | $3,500–$5,500 |
| EL16XC1 | 16 | 3–4 ton | $4,000–$6,500 |
| XC20 | 20 | 3–5 ton | $6,500–$9,500 |
| XC21 | 21 | 3–5 ton | $7,500–$10,500 |
For homeowners asking “how much does a Lennox air conditioning unit cost?”, this table provides a solid starting point for budgeting.
For efficiency comparisons and ENERGY STAR-certified options, see ENERGY STAR Central AC.
🔄 Lennox Furnace and Air Conditioner Cost
Many homeowners opt to replace their furnace and AC simultaneously. Doing both ensures matched efficiency, smoother operation, and often lowers installation labor costs.
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Cost of Lennox furnace and air conditioner: $8,000–$16,000 installed for standard homes
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Lennox ultimate comfort system: Top-tier models can exceed $15,000 but provide variable-speed compressors and optimized comfort.
If you’re curious about how much does a Lennox HVAC system cost, including installation, you can get reliable estimates from Modernize HVAC Calculator.
⚡ Factors Affecting Total Lennox HVAC Cost
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Existing Ductwork – If your home has good ductwork, installation is easier and cheaper. Adding or replacing ducts can add $1,500–$5,000.
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Home Size – Larger homes require bigger AC units and more complex furnace systems.
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Location & Labor Rates – Regional labor rates affect total installed costs.
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Efficiency & Model Choice – Higher SEER and AFUE ratings increase upfront cost but reduce long-term utility bills.
🏠 Installation Considerations
Replacing a Lennox AC or a full HVAC system is more than dropping in a new unit. A professional installer ensures:
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Proper sizing using Manual J load calculations
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Correct refrigerant charging
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Safe electrical and gas connections
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Optimal airflow for energy efficiency and comfort
Homeowners often underestimate the importance of professional installation. As This Old House explains, a licensed installer ensures safety, efficiency, and warranty compliance.
💡 How to Save on Lennox AC Costs
Here are some tips for keeping your Lennox AC unit prices manageable:
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Shop for bundle deals – Replacing both furnace and AC often reduces labor costs.
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Consider mid-range models – ML17XC1 or EL16XC1 provide efficiency without top-tier pricing.
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Use existing ductwork – Saves significant installation costs.
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Install off-season – Spring or fall installations often have lower labor rates.
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Compare multiple dealers – Lennox pricing varies, so shop around for quotes.
🌱 Long-Term Value of Lennox AC
While Lennox units are premium-priced, they offer:
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Reliable cooling and heating
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Energy efficiency that can save hundreds annually
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Quiet operation and comfort control
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Advanced features like variable-speed compressors and smart thermostats
For homeowners looking for value, sometimes a well-priced bundle like the Goodman 3 Ton 14.5 SEER2 R-32 system provides nearly equivalent comfort at a lower upfront investment.
📊 Cost Summary: Lennox AC Units
Here’s a snapshot of typical Lennox AC costs installed:
| Size / Model | Price Range Installed |
|---|---|
| 3 ton ML17XC1 | $3,500–$5,500 |
| 3 ton EL16XC1 | $4,000–$6,500 |
| 4 ton 16 SEER | $4,500–$7,500 |
| 5 ton AC 3 phase | $6,500–$10,000 |
| XC20 / XC21 | $6,500–$10,500+ |
✅ Final Thoughts
If you’ve been asking, “how much does a Lennox AC unit cost?” or “what’s the price of a Lennox furnace and air conditioner?”, it’s important to consider both equipment and installation. Efficiency, size, and home complexity all affect total cost.
High-end Lennox units like the XC21 or XC20 deliver comfort and savings but at a premium. Mid-range models like ML17XC1 offer solid performance at more approachable prices.
If you’re weighing options, a well-priced, energy-efficient bundle like the Goodman 3 Ton 14.5 SEER2 R-32 system provides modern comfort and reliable cooling at a lower upfront investment. Either way, understanding Lennox AC unit prices and installation factors helps you make an informed, confident decision.
