Lennox Air Conditioner Reviews and Prices 2024

lennox air conditioner reviews

Note: If you’re just beginning your research into central ac units, then our Central AC Ultimate Guide is the best place to start. Also, our AC Sizing Calculator can help you find a relatively accurate size quickly. Many issues are caused by an oversized or undersized AC.

Lennox air conditioners are the most efficient available at all levels of quality – basic, better and best. Every AC is certified Energy Star for efficiency.

Is efficiency all that counts? It’s a lot of what homeowners are looking for, but there are concerns about Lennox durability and repair costs that should be considered before you buy.

This Lennox air conditioner buying guide offers a comprehensive look at one of the best-selling AC brands. We’ve completed buying guides like this for all major brands and some you might have never heard of. The guides are a quick but thorough way to compare central air conditioner brands and models head to head.

For more general information about buying a central air conditioner such as unit prices, installation cost, the right efficiency for your climate, sizing it properly, understanding performance and comfort features, see our comprehensive Air Conditioner Prices and Buyers Guide.

Now, here is the list of topics covered in this Lennox AC buying guide:

Lennox Air Conditioner Exclusive Features

A few things set Lennox apart from other brands.

Premium Efficiency

Lennox makes the most efficient split system available right now, the Signature Series Lennox XC25 with a 26 SEER rating. (Update in 2023: the latest model SL28XCV can get up to 28 SEER)

It also makes the most efficient two-stage split system air conditioner, the Elite Series Lennox XC20 with a 20 SEER rating, and the most efficient single-stage AC, the 18.5 SEER Lennox SL18XC1.

Nine of the 11 Lennox air conditioners are certified Energy Star.

Variable-capacity Compressor

A few brands use variable compressors in their top models, but Lennox was among the first.

Both the XC25 and XC20 are variable capacity.

This diagram shows how their performance maximizes efficiency and optimizes indoor comfort:


A single-stage compressor wastes energy by cooling past the thermostat point – starting, running 100% and then stopping. A two-stage compressor is better, but not as efficient as the balanced running of a variable-capacity unit.

The compressor can run at capacity from about 30% to 100% to precisely meet cooling demand. It will run at the lowest capacity needed to do the job.

Climate control

This optimizes indoor comfort by keeping temperatures evenly balanced. Running at an even keel for a longer period of time also removes more summer humidity, and air that is drier is more comfortable.

Of course, running at lower capacity is quieter than two-stage and single-stage units can operate.

Aluminum Coils

The Lennox Quantum coil is available on the Signature Series SL18XC1, Elite Series EL16XC1 and Merit Series ML14XC1.

Trane and American Standard use aluminum coils called Spine Fin coils.

Pros: The Lennox Quantum coil is a durable aluminum alloy used in the refrigerant tubing and the coil’s radiator-like fins. The advantages include better resistance to corrosion in salt environment and a lower upfront cost.

Cons: Aluminum coils have a slightly lower heat transfer rate and more difficult repairs. Coils are often replaced due to leaks or cracks because of the challenge of getting a weld to hold.

While the cons are significant, if you live in a coastal environment, aluminum is a better choice.

SunSource Solar

Here is another example of Lennox leading the way toward energy efficiency.

SunSource is similar to other solar power systems.

  • 4-16 Solar World modules (about 38” x 66”), in black or silver, are used depending on whether you want to power your HVAC system only or also other home systems such as lighting. Watt peak (WP) is 275 and 280 respectively.
  • The solar cells are monocrystalline (or mono crystalline).
  • The SolarWorld kit also includes an Enphase DC to AC micro inverter and Envoy Communications Gateway for monitoring the system’s performance.
  • Roof-mount kit completes the system.

All components are wired together.

This video has more details.

Is SunSource Worth the Money?

Solar equipment is becoming more efficient while cost is coming down.

According to the solar experts at Energy Sage, SolarWorld solar power kits cost $2.73 to $3.11 per watt of power installed. This includes the panels, wiring, micro inverter, etc.

However, that pricing is usually for an average whole-house system of about 6,000 watts or 6kW.

The 4-panel system for Lennox SunSource would be 1,100 to 1,120 watts, or about 1.1kW. You’d still need the micro inverter and other accessories, hardware and wiring. Their high cost wouldn’t be spread out over as many watts of solar power.

Our estimate is that a SunSource solar system using SolarWorld panels would cost about $4.30 per watt.

That comes to about $4,730 installed. But your final cost will be lower. Here’s how:

Federal solar energy equipment tax credits are still in effect. The credit is 30% through 2019, then decreases to 26% for tax year 2020, then to 22% for tax year 2021. It expires December 31, 2021. There’s a good chance it will be renewed, but nothing is guaranteed beyond 2021.

Saving 30% on $4,730 would reduce the cost to $3,311. Additional rebates from local energy providers might be available. They can be searched on your provider’s site or at the Database of State Incentives for Renewables and Efficiency.

With the tax credit and potential local rebates, solar energy systems like Lennox SunSource become cost-effective options.

Suggestion: Before you purchase a SunSource system to power your HVAC system, get estimates for a solar power system that will run your entire home. Depending on the size of your home and your climate, a system of 4kW to 8kW will be needed (most homes). You get better economies of scale with a larger system, so lower cost per kW. With whole-house solar, your energy bill can drop to zero most months of the year.

Lennox Air Conditioner Cons

Lennox uses the highest percentage of proprietary parts of any brand. Most use universal parts like Emerson/Copeland compressors that are affordable and available. There are two negatives associated with Lennox parts.


Some pro HVAC repair technicians claim that Lennox parts tend to wear out faster. That means less reliability and higher cost over the lifetime of the air conditioner.

Parts Cost and Availability

Lennox repair parts such as compressors and motors cost more than parts for most other brands.

Because they are not universal, they are also hard to get much of the time. Repairs that should be same-day/next-day repairs can drag out for a week or more.

Lennox AC Models Reviews

ModelSEER RatingCompressorDecibels
Signature Series
SL28XCV28 SEERVariable59 db
XC2526 SEERVariable59 db
EL23XCV22.4 SEER2-stage59 db
XC2121 SEER2-stage69 db
XC2022 SEERVariable65 db
SL18XC118.5 SEERSingle-stage65 db
EL18XCV18 SEERVariable72 db
Elite Series
XC20 20 SEERVariable65 db
XC1617.2 SEER2-stage74 db
EL16XC117 SEERSingle-stage71 db
XC1315.5 SEERSingle-stage74 db
Merit Series
ML18XC218 SEERTwo-stage75 db
16ACX17 SEERSingle-stage75 db
ML14XC1 16 SEERSingle-stage76 db
14ACX16 SEERSingle-stage76 db
13ACX13 SEERSingle-stage76 db

Note: Higher SEER is not Better. Finding the best SEER is a bit tricky but our SEER Savings Calculator can help you find a suitable SEER based on your location.

Lennox makes 11 central air conditioners in three series:

  • Basic: Lennox Merit Series. 4 models, 13-18 SEER. Single-stage.
  • Better: Lennox Elite Series. 4 models, 15.5-20 SEER, single-stage, two-stage and variable capacity.
  • Best: Dave Lennox Signature Collection. 5 models, 18.5-28 SEER. Single-stage, two-stage and variable capacity.

Here is a breakdown of the models and our recommendations.

The XC25 and SL28XCV are variable-capacity units. Both are costly, but deliver excellent efficiency and indoor climate comfort.

Recommended for: Homeowners that want premium efficiency, quiet operation and very balanced temperatures even at a higher cost. The efficiency level is best suited to warm to hot climates. These are also recommended for anyone wishing to dramatically reduce energy use and their carbon footprint.

The XC21 and XC16 are two-stage air conditioners. They run at low capacity, which is about 70%, as much as possible to keep your home cool, dry and comfortable. The 21 SEER of the XC21 is the best in class.

Recommended for: Those that want a balance of lower cost than a variable-capacity AC but better performance than a single-stage model. The efficiency level is right for warm and hot climates.

The Signature Series SL18XC1, Elite Series EL16XC1 and Merit Series ML14XC1 have the Lennox Quantum coil.

Recommended for: Homes within five miles of a saltwater coast.

All other models are single-stage ACs. They run at full capacity whenever on, which might result in slight temperature imbalance. It is also louder.

Recommended for: Homeowners that prefer a lower cost unit than premium climate control. The single-stage models range in efficiency from 13 to 18.5, so you have efficiency options for your climate.

Lennox Air Conditioner Prices By Model

Unit Cost Range includes equipment wholesale price plus contractor’s profit. Total Cost Range includes Total Cost with the installation. The installation cost doesn’t include new ductwork.

Please note that your local price may vary according to different labor fee rates, taxes rate and contractor’s profit margin.

ModelsUnit Cost RangeTotal Cost Range
Lennox Signature XC25$6,200 - $8,560$7,870 - $11,860
Lennox Signature XC21$5,780 - $7,790$7,380 - $10,860
Lennox Elite XC20$5,950 - $8,040$7,830 - $11,470
Lennox Signature SL18XC1$5,330 - $7,430$6,880 - $10,780
Lennox Elite XC17DiscontinuedDiscontinued
Lennox Elite EL16XC1$4,990 - $7,260$6,120 - $10,430
Lennox Elite XC16$5,260 - $7,420$6,770 - $10,630
Lennox Merit 16ACX$4,550 - $6,840$6,260 - $9,800
Lennox Elite XC14DiscontinuedDiscontinued
Lennox Elite XC13$4,690 - $6,830$6,220 - $10,090
Lennox Merit ML14XC1$4,450 - $6,550$6,030 - $9,640
Lennox Merit 14ACX$4,290 - $6,260$5,890 - $9,190
Lennox Merit 13ACX$4,040 - $6,070$5,740 - $9,050

See costs in your areaEnter Your Zip Code

Lennox AC Prices By Size

Before installing your air conditioner, an HVAC contractor needs to size your system by “Manual J” calculation. This will take into accounts factors like where you live, how much insulation you have, windows types and directions, and everything else. Then you will get a right-sized central air conditioner ranging from 1.5-ton to 5-ton.

AC Unit SizeHome SizeSystem CostTotal Cost with Installation
1.5 ton600 - 1000 sf$4,470 - $5,070$5,560 - $6,560
2 ton1001 - 1300 sf$4,730 - $5,300$5,780 - $6,680
2.5 ton1301 - 1600 sf$4,700 - $5,250$6,280 - $7,120
3 ton1601 - 1900 sf$4,770 - $5,400$6,380 - $7,500
3.5 ton1901 - 2200 sf$4,900 - $5,510$6,560 - $7,510
4 ton2201 - 2600 sf$5,170 - $5,810$7,120 - $7,900
5 ton2601 - 3200 sf$5,610 - $6,340$8,280 - $9,040

Note: The above table is updated on Feb 1, 2023 and shows the average cost based on a Lennox 16 SEER AC Unit with a ECM Air Handler. “System Installed Cost” includes the whole equipment cost and national average installation cost. The installation cost doesn’t include new ductwork.

The “Home Size” column is a very rough estimate. The warmer your climate is, the bigger the AC must be relative to house size. You can use our AC Sizing Calculator to get a suitable size in a minute.

How to Get the Best Lennox Air Conditioner Prices?

Firstly, when you looking for the best deals for Lennox AC, keep in mind that installation quality is always the most important thing for residential HVAC project.

  • So never sacrifice contractor quality for a lower price.
  • Secondly, remember to look up the latest tax credit and rebates.
  • Thirdly, ask for at least 3 bids before you make the decision. You can click here to get 3 free estimates from your local contractors, and this estimate already takes rebates and tax credit into consideration and filter unqualified contractors automatically.

Lastly, once you chose the right contractor, remember to use the tactics from this guide: Homeowners Tactics When Negotiating with HVAC Dealer to get the final best price.


Why are Lennox air conditioners so expensive?

There are two main reasons.

  • Top Lennox air conditioners are extremely efficient. The XC25 with efficiency up to 26 SEER is easily the most efficient split system air conditioner available. The XC21 at 21 SEER is the most efficient two-stage AC, and the SL18XC1 at 18.5 SEER is the most efficient single-stage model available.
  • Lennox has good name recognition and a big advertising budget. The brand still has a pretty good reputation for quality, but we have our concerns.

How long does a Lennox air conditioner last?

A: Expect 15-20 years from Signature Collection air conditioners. Elite Series air conditioners last up to 17 or 18 years on average. Merit Series ACs should give you 15 years of service. With any of the lines, it is important to keep them maintained.

Should I buy a very efficient air conditioner?

It depends on your climate and your values. The hotter and more humid your climate is, the more it makes sense to buy an efficient central air conditioner. You’ll pay more upfront, but you will recover the extra expense in 3-10 years through lower energy costs.

And if your environmental convictions move you to reduce your carbon footprint, then yes, an efficient AC is a good choice wherever you live. The Lennox SunSource system is ideal for green air conditioning.

Submitted Prices and Reviews in 2020-2023

Last updated on Feb 7, 2023

Related Article: In-depth Comparison: Trane vs Carrier vs Lennox AC Review

Written by

Rene has worked 10 years in the HVAC field and now is the Senior Comfort Specialist for PICKHVAC. He holds an HVAC associate degree and EPA & R-410A Certifications.
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5 thoughts on “Lennox Air Conditioner Reviews and Prices 2024”

  1. Hi we are building a new home in New England a small town south of Boston Kingston Ma. I will be installing a gas furnace using radiant floor heat. I’m looking for a A/C unit with a heat pump. I have sent plans to a few HVAC company’s and they say I need two systems one 2 ton and one 4 ton unit. I should say the house is 3150 square ft with 10′ ceilings.
    Any help would be helpful.


  2. Hello is this a good DEPENDABLE HVAC unit & price for my 1600 SF home? I live it Atl. Ga.
    Lennox, Condenser; 14 ACXS030 2.5 ton Coil; C35-30B 16 seer Furnace ML180 UHO70 E36B BTU; 70,000 Afue 80%
    New metal plentums supply & return and new high efficiency air cleaner
    Installed Price; $5000.00 with honey well T6 thermostat programmable.

    • Hi Matt,
      I’m about to have this same unit installed in my home,along with a new gas furnace as well. I’m having a new return air placed in the master bedroom too. My home is 1658 square feet. My final install cost is going to be around 7200.00. I was just wanting to know what your opinion of your system is…???
      Hope to hear back from you,thanks.

  3. Lennox would be the last brand I put in my home again. The warranty on most brands are the same. We build a new home 11 years ago. Both units this year needed coils replaced. Call me old I guess but when you drop 20k on units you hope they last bit longer. Lennox will not list prices for replacements. They ask you to contact a dealer. Do your self a favor and use your local Home Depot and Lowes. Brands will do the same with much less cost and headaches.


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