Lennox Gas Furnace Reviews and Prices 2024

Before you dive into the specific brand review, we highly recommend you to read our elaborate Gas Furnace Buying Guide in advance. There are several crucial steps you need to take before you even start to think about the brand.

This Lennox gas furnace buyers guide is your one-stop source for researching one of today’s leading furnace lines. You’ll find the comprehensive information needed to decide if Lennox is the brand you want and which model will best serve your home. The US Climate chart below will ensure you select a Lennox furnace that produces cost-effective heating where you live.

Lennox makes ten gas furnaces in three series:

  • Basic – Lennox Merit Series furnaces (ML): Single-stage furnaces with 80% and 90%-plus efficiencies
  • Better – Lennox Elite Series furnaces (EL): Single-stage and two-stage furnaces with 80% models and 90%-plus models
  • Best – Dave Lennox Signature Collection furnaces (SL): Two-stage and modulating furnaces with 80% AFUE models and furnaces up to 99% AFUE, currently the most efficient gas furnace made

Lennox gas furnace prices for all models are listed in below list, so you’ll have a good idea of what to expect before you call dealers to get estimates. Now let’s get started! You can check a quick content navigation below:

5 Lennox’s Exclusive Features


This is the necessary function for highest efficient(97%-98%) gas furnaces. Modulating is the key to obtaining beyond 95% efficiency. We recommend this function for those of you who plan on living in your home for a long time in winter. For more details, you can read our previous article: Modulating Furnaces: Are They Worth the Money?

Duralok Plus Heat Exchanger

A heat exchanger is the most important component of any gas furnace. Lennox has installed a Duralok Plus heat exchanger that is made of ArmorTuf steel. The ArmorTuf steel is patented and offers energy efficiencies and reliability. You can find a lot of positive feedback for this heat exchanger online.

Most Efficient Gas Furnace (SLP98V) 98.7 AFUE

The Lennox Signature Collection SLP98V gas furnace achieves a best-in-class 98.7% annualized fuel efficiency (AFUE); just 2.3% of the heat produced is lost with the combustion gas exhaust.

This Lennox gas furnace is built with primary and secondary heat exchangers and condensing technology to capture and transfer more heat than any other gas furnace available today. This superior efficiency level is also achieved in the SLP98V with a modulating gas valve that, like cruise control, runs at the optimal level needed to keep temperatures perfectly balanced without overheating. The variable-speed blower contributes to efficiency by effectively utilizing the heat produced and transferred, never blowing unheated air at the beginning or end of the cycle.

SureLight Ignitor

This is another feature that makes the unit very reliable and durable. Lennox claims the Silicon nitride construction ensures the product lasts for years without regular breakdowns. This might be true, but almost all brands claim their units are reliable and strong.

SunSource Solar Modules

Imagine heating and cooling your home with a heat pump and having zero energy cost and using no fossil fuel! That’s possible with the Lennox SunSource solar home energy system. SunSource uses 3’x6’ solar modules to capture solar energy and deliver it to a Lennox heat pump or central AC equipped with solar-ready technology. Leftover energy can be used for your home’s electronics and small appliances. The Lennox SunSource system adds $8,000 to $20,000 to HVAC equipment costs depending on the number of panels used, but when savings are considered, it might be worth the investment if your home is in a sunny climate or if green heating and cooling is a top priority for you. Plus, the Residential Renewable Energy Tax Credit is still in effect. It allows you to take a 30 percent tax credit on the cost of a solar system. That’s one more reason to consider going solar!

Model Analysis and Recommendation

ModelAFUEBlower SpeedStageHeat Exchanger Warranty
SLP99V99%Variable SpeedModulating20-Year or Lifetime Limited
SL297NV97.50%Variable SpeedTwo-Stage20-Year or Lifetime Limited
SL280V80%Variable SpeedTwo-Stage20-Year or Lifetime Limited
SL280NV80%Variable SpeedTwo-Stage20-Year
EL297V97%Variable SpeedTwo-StageLimited Lifetime
EL296V96%Variable SpeedTwo-StageLimited Lifetime
EL296E96%Power Saver™ Constant TorqueTwo-StageLimited Lifetime
EL280E80%Power Saver™ Constant-TorqueTwo-Stage20-Year
EL196E96%Power Saver™ Constant-TorqueSingle-StageLimited Lifetime
EL195NE95%Power Saver™ Constant TorqueSingle-StageLimited Lifetime
EL180NE80%Power Saver™ Constant TorqueSingle-Stage20-Year
ML296V96%Variable SpeedTwo-Stage20-Year
ML196E96%Power Saver™ Constant TorqueSingle-Stage20-Year
ML193E93%Power Saver™ Constant TorqueSingle-Stage20-Year
ML180E80%Power Saver™ Constant TorqueSingle-Stage20-Year

When you’re looking for the most cost-effective heating, the strategy is to find the balance between furnace cost and energy costs. Let’s use the zone map to identify efficiency levels for each that strike that balance:

Suggested AFUE
Cost-effective Models
Zones 1 & 2 (hot) 80%
ML180V, ML180E
Zone 3 (warm) 80%
Zone 4 (moderate) 90%
Zone 5 (cool) 90%-93%
Zone 6 (cold) 92%-95% EL195NE, ML193E
Zone 7 (very cold) 95% and up SLP99V, EL296V, EL296E

Note for the short-term house:

Lennox is one of the premium brands with higher initial cost. If you have the plan of moving house in less than 5 years, we recommend installing some quality but low-end level brands like Payne, Ruud or Armstrong. Looking for more budget brands? You can check our gas furnace brands guide.

Contractor Reviews For Lennox

Specific contractor reviews on gas furnaces are very rare due to the wide array of gas furnace models in the market. It is difficult to review all models on reliability and efficiency as most brands will work for years without a problem. BUT we just interviewed Kobie who is the after-sale manager who has 20+ years experience for Lennox, Goodman and Heil furnaces.

I have worked in the commercial and residential HVAC field for many years, and I know that a significant percentage of furnaces failures are as a result of poor installation and very cheap units. The Lennox Merit series has proven to be a piece built on high quality and reasonable price. I have installed this model for my cousin for eight years, and had any major failures. The Lennox gas furnace might not beat the Goodman, the Carrier or the Heil in the price but can do an excellent job of heating and cooling your home. Some consumers have reported the Lennox gas furnaces breaking down almost every year during the winter season. This might be true, but most breakdowns are associated with the poor installation of the units.

-Kobie from Uuder Comfort Heating & Cooling Inc

Note For Lennox Furnace Parts

It is worth noting that all Lennox’s parts are proprietary. The parts are three times as expensive as other parts which you can easily find in the market. So if you choose Lennox Furnace, we strongly recommend you purchase the extended warranty with the labor fee included.

Lennox Gas Furnace Prices By Model

We need to set an equal baseline before we can list the prices for each Lennox model. In this list, each furnace includes the same parameters: 70,000-75,000 BTU with 1000 CFM blower which is the mid-sized home of around 2,000 square feet, 10-year warranty excludes the labor fee.

The Unit Only price is the online wholesale price without shipping fee. The Unit Installation Cost include gas furnace unit, all the material for the house and labor fee.

ModelsUnit OnlyUnit Installed Cost

Lennox Furnace Prices By Size

The cost list below is from an average baseline: Lennox 296E, No New Ductwork, 10-year warranty and average labor fee.

Lennox Furnace SizeFor Home SizeUnit Cost With Installation
Lennox 40,000 BTU600 - 1000 sf$3,900 - $4,250
Lennox 50,000 BTU800 - 1200 sf$4,450 - $4,700
Lennox 60,000 BTU1000 - 1400 sf$5,050 - $5,350
Lennox 70,000 BTU1200 - 1600 sf$5,350 - $5,600
Lennox 80,000 BTU1400 - 1800 sf$5,650 - $6,000
Lennox 100,000 BTU1800 - 2300 sf$6,550 - $6,850
Lennox 120,000 BTU2300 - 3000 sf$7,250 - $7,450

See costs in your areaEnter Your Zip Code

You can use our furnace sizing calculator to get the Trane furnace size you need. Want to replace your air conditioner together? Check our Lennox Air Conditioner Prices and Installation Cost for more info.

Submitted Prices and Reviews by Visitors

We will update this table every 3-6 months and you may not see your submitted review immediately. Only fake and unreasonable submitted information will be filtered. (Last Update: 17th Jan., 2023)

  • Firstly, keep in mind that installation quality is always the most important thing for a gas furnace project. So never sacrifice contractor quality for 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.

Feel free to ask any question by leaving a comment. We will answer any question with actionable tips.

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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9 thoughts on “Lennox Gas Furnace Reviews and Prices 2024”

  1. I have a Lennox G14 pulse furnace installed in 1990. It has been serviced regularly but it’s starting to show signs of its age – blower noisy, the pulsing sound when it is running isn’t as steady…..As I am the original owner and only recently learned that Lennox had a recall program (which the “premiere” Lennnox dealer never informed me about), I was wondering if there is a way that I could get a substantial credit ($500) for this oversight on the dealer’s part without the contractor marking up the new unit

    • Hi, John
      I know this question is 8 months old, but here’s an answer. It is highly unlikely anyone would give you a genuine $500 break on a furnace that is 28 years old — and one that has given you good service. You got your money’s worth, and then some. That’s my professional opinion. If, in fact, you got a deal on a new furnace, let us know what you bought and what you paid. That would be helpful.
      Best, Geo.

    • The only way your going to get anything, is from a heat exchanger issues. You will have to have a professional company use the test kit provided by Lennox to determine this.

      • Not True. I just called Lennox and was told that there is still a Pulse replacement program for the unit. No need for a pressure test as they will also replace the unit if parts are no longer available. Call them yourself at (972)497-5799

        G14/GSR14/G21/GSR21 PulseTM Replaced with EL195E $675 or future equivalent
        G21V/GSR21V PulseTM Replaced with EL296V $875 or future equivalent

        In other words, Lennnox dealer must charge you a fixed price of either $675 for a EL195E or $875 for a EL296V or a future equivalent. Of course that does not include the cost of installation.

        Here to the memo


        To: Lennox Dealers

        Subject: Revised PulseTM Key Component Replacement Procedure

        Date: October 1, 2011

        Effective October 1, 2011(1), Lennox will implement a revised PulseTM Key Component Replacement Procedure to replace Lennox PulseTM furnaces when key components, that are unique to the PulseTM furnace, are no longer produced by Lennox or our suppliers. This procedure applies to:

        Heat Exchanger Replacement

        Key Component(2) Not Available (Other than HE)

        The original furnace owner or, If not the original owner, installation date must be less than twenty years

        The original or subsequent owner and the installation date must be less than fifteen years


        During the inspection and/or service of PulseTM furnaces, if it has been determined the heat exchanger is covered by warranty(3) and a heat exchanger is found to have failed, the offer of a replacement furnace below will be made to the homeowner. If a key component (other than the heat exchanger) is found to have failed and is no longer available, the following offer of a replacement furnace will be made to the homeowner if the furnace installation is less than fifteen years. _____________________________________________________________________________________ Model Fixed Price of New Lennox Furnace to Homeowner(4) _____________________________________________________________________________________ G14/GSR14/G21/GSR21 PulseTM Replaced with EL195E $675 or future equivalent _____________________________________________________________________________________ G21V/GSR21V PulseTM Replaced with G61MPV / EL296V $875 or future equivalent _____________________________________________________________________________________

        (1) This procedure applies to PulseTM furnaces with heat exchangers covered under warranty which has a key component failure and the failed part is no longer produced.

        (2) See attached list of key components.

        (3) PulseTM furnaces that are no longer within the heat exchanger warranty period are not eligible for this offer.

        (4) Is a fixed price to be charged to the homeowner not including taxes

        Upon the submission and approval of a valid Lennox PulseTM Key Component Replacement Form, the dealer will receive a credit from Lennox. This credit represents the difference between the dealer invoice amount from Lennox for the replacement furnace and the fixed price the homeowner will pay.

        This procedure does not require the return of the PulseTM furnace or key component. For a failed heat exchanger, simply perform the pressure test, submit the completed PulseTM Key Component Replacement Form, and where applicable, provide proof of original ownership. Examples of proof of ownership include but are not limited to bill of sale, copies of canceled checks, loan documents, title documents, tax records and utility bills.

        PulseTM Key Components
        1. Heat Exchanger
        2. Ignition Control
        3. Gas Valves
        4. Pressure Switch
        5. Purge Blower
        6. VSP Control (VSP-1)
        7. Fan Timer Control (FTC)
        8. WG1 Watchguard Control
        9. Fan & Limit Control
        10. Modulation Control
        11. Spark Plug
        12. Spark Plug Lead
        13. Flame Sensor
        14. Flame Sensor Lead
        15. Orifices
        16. Air Diaphragm Assembly
        17. Gas Diaphragm Assembly
        18. Air Diaphragm Housing
        19. Drip Legad)

  2. I replaced the lennox furnace that was in my house when we moved in. Apparently the old lennox was blowing carbon so needed to be replaced. Since replacement with new Lennox SPL98 series, the house has been invaded with lots of moisture and condensation which we never had with the old one. The guy who installed told me to turn the thermostat fan on all the time which I did. But did not solve the problem. What do you think is the reason of this? How to solve it?

  3. We have a two year old house in a cold part of Montana. One small guest bedroom is always several degrees colder than the rest of the house. The dealer installed a second floor vent which really did not help. We paid a dealer for another company to look at the system and see if he could find the problem. He thought it was a lack of air movement into the room and installed a vent in the door. Very little difference. The insulation is fine, the windows are new and tight. When we were away for a few days and turned the heat down, the furnace ran for quite awhile to heat the house, and that room actually got very warm. What could be the problem? It is a ML 195UH series gas furnace.

  4. I recently had to replace my furnace and the first quote I received was $5,800. I was satisfied at first but then they were talking about finance fees of almost $700 including the finance charges. I said that I would put it on a credit card and he said that tool would have a 4% fee. At that point I decided to get another quote. It ended up being for a Lenox ML180 that I had installed for $2,700. At first I was ecstatic but is this enough for a 2,100 sq/ft home in the Portland, OR area?

  5. Is the Lennox G71 a good furnace? What should the life expectancy be if all required maintenance was completed by a qualified Lennox tech? Thank you


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