Lennox is one of the top three residential HVAC manufacturers in the United States, alongside Carrier and Trane. The company has built its reputation on high-efficiency equipment, quiet operation, and the industry’s first variable-capacity compressor technology. But Lennox systems span a wide price range depending on whether you choose the budget Merit line, the mid-range Elite series, or the premium Dave Lennox Signature Collection.
This guide breaks down Lennox HVAC replacement costs by product tier and system type so you can compare pricing before contacting a dealer. For a quick estimate based on your home’s specifics, try our free HVAC cost estimator.
How Much Does Lennox HVAC Replacement Cost?
Lennox HVAC replacement costs $3,900 to $13,600 or more installed in 2026, depending on the product tier and system type. The table below shows typical installed costs. These include equipment, standard labor, and basic materials. They exclude ductwork modification, permits, and any add-ons like smart thermostats or air quality accessories.
| Product Tier | Central AC (Installed) | Gas Furnace (Installed) | Heat Pump (Installed) |
|---|---|---|---|
| Merit Series | $3,900–$6,800 | $2,900–$4,700 | $5,500–$8,800 |
| Elite Series | $5,000–$9,000 | $4,250–$6,800 | $7,000–$11,200 |
| Signature Collection | $6,500–$12,500 | $5,600–$10,000 | $8,300–$13,600+ |
Most homeowners replacing a standard 3-ton central AC system spend $5,000 to $9,000 with a Lennox unit, landing in the Elite tier. Full system replacements (AC or heat pump plus furnace) typically run $8,000 to $18,000 depending on efficiency choices. Lennox also makes electric air handlers for homes without gas lines, and you can compare all-electric heating costs in our electric furnace replacement cost guide.
What Are the Lennox Product Tiers and How Do They Differ?
Lennox organizes its residential equipment into three product tiers: Merit (budget), Elite (mid-range), and Signature (premium). The tier you choose is the single biggest factor in your final installed cost, with Signature equipment costing roughly double what Merit systems cost. Here is what each tier means in plain terms:
Dave Lennox Signature Collection (Premium)
This is Lennox’s flagship line. Signature models use variable-capacity compressors that adjust output in tiny increments, holding your set temperature within half a degree. The result is extremely quiet operation, even humidity control, and the highest efficiency ratings Lennox offers (up to 24 SEER2 for AC, 99% AFUE for furnaces). Signature equipment integrates with the iComfort smart thermostat for remote monitoring and diagnostics. Signature AC models include the SL28XCV (24 SEER2) and XC21 (21 SEER2). Variable-capacity systems like these are also the best candidates for HVAC zoning, since they can modulate output as zones open and close instead of short-cycling.
Elite Series (Mid-Range)
Elite models balance performance and price. You get two-stage or variable-speed operation, SEER2 ratings in the 16 to 22 range for AC, and quieter operation than the Merit line. Elite is the most popular tier among homeowners who want meaningful efficiency gains without Signature pricing. Key models include the EL23XCV (22 SEER2 AC) and EL296V (96% AFUE furnace).
Merit Series (Budget)
Merit is Lennox’s entry-level line. These are single-stage systems that meet minimum federal efficiency standards (13.4 to 17 SEER2 for AC, 80% to 96% AFUE for furnaces). Merit units are reliable and affordable, but they lack the quiet operation and precise temperature control of higher tiers. Models include the ML14XC1 (14.3 SEER2 AC) and ML180E (80% AFUE furnace).
How Much Does a Lennox Air Conditioner Cost by Model?
A Lennox central air conditioner costs $3,900 to $12,500 installed, depending on the model and efficiency tier. The ML14XC1 Merit unit is the most affordable option, while the SL28XCV Signature model with 24 SEER2 tops the lineup. The table below breaks out pricing by specific model series and SEER2 efficiency rating.
| Model | Tier | SEER2 | Stages | Installed Cost |
|---|---|---|---|---|
| ML14XC1 | Merit | 14.3 | Single | $3,900–$5,500 |
| ML17XC1 | Merit | 17.0 | Single | $4,200–$6,200 |
| ML18XC1 | Merit | 18.0 | Two-Stage | $4,800–$6,800 |
| EL16XC1 | Elite | 17.0 | Single | $5,000–$7,000 |
| EL18XCV | Elite | 18.0 | Variable | $5,500–$8,000 |
| EL23XCV | Elite | 22.0 | Variable | $6,900–$9,300 |
| XC21 | Signature | 21.0 | Variable | $8,000–$10,300 |
| SL28XCV | Signature | 24.0 | Variable | $9,500–$12,500 |
Note: Prices assume a standard 3-ton replacement on existing ductwork. Costs increase with larger tonnage, complex installations, or ductwork modifications. Lennox announced price increases of up to 10% effective February 2026, so quotes may vary.
How Much Does a Lennox Furnace Cost by Model?
A Lennox gas furnace costs $2,900 to $10,000 installed, depending on the series, AFUE efficiency rating, and blower type. The budget ML180E starts under $3,000, while the flagship SLP99V (the only 99% AFUE residential furnace on the market) can reach $10,000 installed. Here is how pricing breaks down by model.
| Model | Tier | AFUE | Blower | Installed Cost |
|---|---|---|---|---|
| ML180E | Merit | 80% | Single-Speed | $2,900–$4,250 |
| ML196E | Merit | 96% | Single-Speed | $3,200–$4,500 |
| ML296V | Merit | 96% | Variable-Speed | $3,500–$4,700 |
| EL296E | Elite | 96% | Multi-Speed | $4,250–$5,600 |
| EL296V | Elite | 96% | Variable-Speed | $4,700–$6,800 |
| SL280V | Signature | 80% | Variable-Speed | $5,600–$6,950 |
| SLP99V | Signature | 99% | Modulating | $6,950–$10,000 |
The Lennox SLP99V is the most efficient residential gas furnace on the market at 99% AFUE, meaning virtually every dollar you spend on natural gas becomes heat for your home. It uses a modulating burner and variable-speed blower for precise comfort, but it carries a premium price tag.
How Much Does a Lennox Heat Pump Cost?
A Lennox heat pump costs $5,500 to over $13,600 installed. Heat pumps cost more upfront than central AC because they provide both heating and cooling in a single outdoor unit. The Merit ML17XP1 is the entry point, while the Signature SL25XPV with 23 SEER2 and 10.3 HSPF2 tops the range. Here is how Lennox heat pump pricing breaks down by tier.
| Model | Tier | SEER2 | HSPF2 | Installed Cost |
|---|---|---|---|---|
| ML17XP1 | Merit | 17.0 | 8.5 | $5,500–$8,800 |
| EL18XPV | Elite | 17.0 | 8.7 | $7,000–$9,500 |
| EL21KLV | Elite | 21.0 | 10.0 | $8,000–$11,200 |
| XP21 | Signature | 17.8 | 8.2 | $8,300–$10,500 |
| XP25 | Signature | 23.5 | 10.2 | $9,500–$12,000 |
| SL25XPV | Signature | 23.0 | 10.3 | $10,000–$13,600+ |
High-efficiency Lennox heat pumps (SEER2 16+) may qualify for federal tax credits and utility rebates. Check the 2026 HVAC tax credit guide and your local utility’s rebate program for current offers.
What Drives Lennox HVAC Replacement Costs?
Your final Lennox replacement cost depends on six main factors beyond the base equipment price: product tier, system size, efficiency rating, local labor rates, ductwork condition, and dealer type. These variables can swing the total project cost by $3,000 to $8,000 or more in either direction.
- Product tier: Stepping from Merit to Signature can double your equipment cost, but operating savings offset some of the premium over 10 to 15 years.
- System size (tonnage): A 2-ton system costs less than a 5-ton system. Proper sizing through a Manual J load calculation prevents overspending.
- Efficiency rating: Higher SEER2 and AFUE ratings cost more upfront but reduce monthly energy bills.
- Labor rates: Installation costs vary by region. Urban areas and markets with high demand (like South Florida or the Texas metros) tend to run 10 to 20% higher.
- Ductwork condition: If your existing ductwork needs modification or replacement, add $2,000 to $5,000 to the project total.
- Dealer type: Lennox Premier Dealers typically charge more than independent contractors, but you get full warranty coverage and factory-trained technicians. Costco also sells Lennox systems through its HVAC installation program, often at competitive pricing.
How Does Lennox Compare to Carrier and Trane?
Lennox, Carrier, and Trane are priced within 10 to 15% of each other at comparable tiers, with Lennox running $200 to $800 more than Carrier for similar models. Lennox leads on furnace efficiency (99% AFUE), Carrier leads on AC efficiency (26 SEER2), and Trane is known for durability. For a different warranty structure, Daikin HVAC systems offer a 12-year unit replacement warranty that none of these three brands match. Here is a detailed comparison:
| Feature | Lennox | Carrier | Trane |
|---|---|---|---|
| Budget AC (Installed) | $3,900–$6,800 | $3,200–$5,800 | $4,880–$6,550 |
| Premium AC (Installed) | $6,500–$12,500 | $6,000–$12,000 | $8,860–$10,414 |
| Max AC SEER2 | 24.0 | 26.0 | 24.0 |
| Max Furnace AFUE | 99% | 97% | 97% |
| Parts Warranty | 10 years (registered) | 10 years (registered) | 10 years (registered) |
| Compressor Warranty | Lifetime (Signature) | Lifetime (Infinity) | 12 years |
| Dealer Network | Lennox Premier Dealers | Factory Authorized Dealers | Trane Comfort Specialists |
| Key Strength | Furnace efficiency (99% AFUE), quiet operation | Highest AC efficiency (26 SEER2) | Durability, brand recognition |
Bottom line: All three brands deliver excellent equipment at the premium tier. Lennox edges ahead on furnace efficiency (the SLP99V is the only 99% AFUE furnace on the market) and noise reduction. Carrier leads in maximum AC efficiency. Trane is known for rugged construction. To compare Lennox vs Trane head-to-head on pricing and warranties, see our Lennox vs Trane cost comparison. If you want a brand-by-brand comparison, see our Rheem HVAC replacement cost guide for how Rheem pricing compares to Lennox at each tier. The installing contractor matters as much as the brand, so get quotes from at least three dealers.
What Warranty Does Lennox Offer on HVAC Systems?
Lennox offers a 10-year limited parts warranty on all registered systems, with Signature Collection models getting a lifetime limited compressor warranty. However, there are conditions homeowners should understand before purchasing, especially around dealer requirements and registration deadlines.
| Coverage | Duration | Conditions |
|---|---|---|
| Parts warranty | 10 years | Must register within 60 days of install |
| Compressor warranty | Lifetime (Signature) / 10 years (Elite, Merit) | Registered units only |
| Heat exchanger | 20 years | Most furnace models |
| Unregistered systems | 5 years parts only | Automatic default |
Important: Lennox strongly recommends (and in some cases requires) installation by a Lennox Premier Dealer for full warranty coverage. If an independent contractor installs the system, Lennox may limit or deny warranty claims. Ask your dealer to register the system before they leave your property and keep the confirmation email.
When Is Lennox Worth the Premium?
Lennox is worth the premium if you plan to stay in your home 10 or more years, live in an extreme climate, or prioritize quiet operation. Homeowners in those situations typically recoup the higher upfront cost through energy savings within 7 to 12 years. If you are selling soon or need the lowest possible price, a budget brand may make more sense. For a full brand-tier comparison specifically for heat pumps, see our heat pump replacement cost by brand guide.
Lennox is worth it when:
- You plan to stay in your home 10 or more years and want to recoup energy savings.
- You live in an extreme climate (very hot summers or very cold winters) where high-efficiency equipment makes a bigger difference in monthly bills.
- Noise is a priority. Lennox’s SilentComfort technology and variable-speed compressors are among the quietest in the industry.
- You want the industry’s most efficient furnace (the SLP99V at 99% AFUE).
Consider a budget option when:
- You are selling your home within 1 to 3 years. Buyers rarely pay a premium for brand name HVAC.
- Your budget is under $6,000 for a central AC replacement. Lennox Merit pricing overlaps with Goodman and Amana, but a mid-tier Goodman may give you more features for the same price.
- You need the absolute lowest upfront cost and are comfortable with a shorter warranty.
For a personalized cost comparison based on your home size, system type, and efficiency preferences, use our HVAC replacement cost estimator.
Frequently Asked Questions
How much does a Lennox HVAC system cost installed?
A Lennox HVAC system costs $3,900 to $13,600 or more installed, depending on the product tier and system type. A Merit series central AC starts around $3,900 installed, while a Signature Collection heat pump can exceed $13,600. Most homeowners replacing a standard 3-ton central AC spend $5,000 to $9,000 with a Lennox unit.
Is Lennox more expensive than Carrier or Trane?
Lennox, Carrier, and Trane are all premium brands priced similarly at the top end. Lennox tends to run $200 to $800 more than Carrier for comparable models, and roughly the same as Trane. The bigger cost driver is usually the installing dealer and your region (for example, Scottsdale’s luxury market runs 10–20% above surrounding areas), not the brand itself. All three offer entry-level lines (Merit, Comfort, and Choice respectively) that compete at lower price points.
What is the difference between Lennox Signature, Elite, and Merit?
The three tiers differ in technology, efficiency, and price:
- Merit is the budget line with single-stage operation, basic efficiency (13 to 17 SEER2 for AC, 80 to 96% AFUE for furnaces), and the lowest upfront cost.
- Elite is mid-range with two-stage or variable-speed options, better efficiency (16 to 22 SEER2), and quieter operation.
- Signature (the Dave Lennox Signature Collection) is the premium line with variable-capacity compressors, up to 24 SEER2 for AC and 99% AFUE for furnaces, iComfort smart thermostat integration, and SilentComfort noise reduction.
How long does a Lennox HVAC system last?
A properly maintained Lennox central AC or heat pump typically lasts 15 to 20 years. Gas furnaces often last 20 to 25 years. Lennox Signature models with variable-speed compressors tend to last longer because they run more gently than single-stage systems. Actual lifespan depends on climate, maintenance frequency, and installation quality.
What warranty does Lennox offer?
Lennox offers the following warranty coverage:
- 10-year limited parts warranty when registered within 60 days of installation
- Lifetime limited compressor warranty on Signature Collection models (registered)
- 20-year limited heat exchanger warranty on most furnace models
- 5-year parts warranty if the system is not registered
Full warranty coverage requires installation by a Lennox Premier Dealer. If an independent contractor installs the system, Lennox may limit warranty claims.
Is Lennox worth the premium over a budget brand like Goodman?
Lennox is worth the premium if you plan to stay in your home 10 or more years and value quiet operation, precise temperature control, and lower monthly energy bills. A Lennox Signature AC at 24 SEER2 can cut cooling costs 40 to 50% versus a 14 SEER2 budget unit. However, if you are selling your home soon or need the lowest possible upfront cost, a Goodman or budget-tier Lennox Merit unit delivers reliable cooling for significantly less money.
See how Lennox compares to Carrier, Trane, and all major brands in our complete HVAC brand comparison guide. For installed furnace price ranges across all brands, see our furnace replacement cost by brand guide. For Lennox coil repairs before full replacement, the evaporator coil replacement cost guide covers installed price ranges by brand and tonnage.
Lennox is a popular brand in cold-climate Minnesota markets. See our Minnesota HVAC replacement cost guide for statewide pricing data and Xcel Energy rebate details. Kansas homeowners can find local pricing and Evergy rebate details in our Kansas HVAC replacement cost guide.
Lennox has a strong Factory Authorized Dealer network across Ohio, especially in Columbus and Cleveland. See the Ohio HVAC Replacement Cost Guide for statewide pricing context, utility rebates by territory, and how cold-climate demand affects equipment selection in northern Ohio.
California is one of Lennox’s strongest markets, with Title 24 efficiency standards that favor the brand’s high-SEER2 XC21 and SL28XCV systems. California homeowners benefit from stacking Lennox’s Energy Star-qualified equipment with TECH Clean California rebates, SoCal Edison incentives up to $1,500, and the federal 25C tax credit. See our California HVAC replacement cost guide for how Lennox pricing fits into California’s rebate landscape.
Last updated: March 2026. Prices reflect national averages and may vary by region. Get personalized estimates with our free HVAC cost estimator. Sources: Lennox.com, PICKHVAC, Today’s Homeowner, HomeGuide, BestCompany.