Lennox Furnaces

Everything you need on Lennox Furnaces, including model details, industry rankings and customer reviews, all in one place.

Lennox Furnace Overview

Lennox opened its doors in Marshalltown, Iowa in 1895. Lennox is named for founder Dave Lennox, who created a riveted-steel, coal-fired furnace as one of the company’s first products. Nowadays, Lennox manufactures both gas and oil furnaces, organizing models by both price and efficiency. The company uses AFUE (Annual Fuel Utilization Efficiency) to describe each model’s energy efficiency

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Consumer Reviews of Lennox

2.6

  • Very Satisfied
    86
  • Somewhat Satisfied
    5
  • Neutral
    8
  • Somewhat Unsatisfied
    20
  • Very Unsatisfied
    135
  • #15 of 86 Furnaces
  • 35.83% of customers recommended

The defining feature of Lennox furnaces is Precise Comfort technology, which maximizes your home’s comfort while maintaining energy efficiency. This technology allows your furnace to make adjustments to its heat output. In milder climates, Lennox furnaces use very low airspeed and a small flame to circulate minimal amounts of warm air throughout your home. The furnace creates a larger flame and uses a higher airspeed when your home needs substantial heating.

During summer months, Lennox furnaces provide a continuous flow of filtered air while simultaneously reducing your home’s humidity. 

Lennox furnace series and models

Lennox offers 22 dual-fuel capable gas and oil furnaces. This section covers five top models. In each case, pricing can vary based on factors like unit type and home size. Consult a local HVAC professional for the most accurate quotes.

SLP98V | Up to 98.7% AFUE

The SLP98V Lennox gas furnace has industry-leading efficiencies, including up to 98.7% AFUE, which can save you hundreds in utility costs annually. This model earned ENERGY STAR Most Efficient status in 2020.

Features

  • Modulating heat stages
  • SilentComfort Technology
  • Insulated blower compartment
  • SureLight Silicon Nitride Ignitor

Technical Specs

  • Variable-speed motor
  • Enhanced humidity control
  • Insulated blower compartment
  • Air filter and humidifier capabilities
  • Ultra-low continuous fan

Efficiency

  • Up to 98.7% AFUE
  • ENERGY STAR qualified

Pricing

  • Lennox furnace pricing: $2,230.00
  • Furnace installed: $3,790
  • Air and heating installation: $8,260

SL297NV | Up to 97.5% AFUE

Experience all-around comfort when selecting the SL297NV Lennox gas furnace. This ultra-low NOx gas furnace features a revolutionary design that produces 65% lower NOx emissions compared to other low NOx furnaces. 

Features

  • Two-stage heating
  • SilentComfort technology
  • Variable-speed motor
  • Insulated blower compartment
  • SureLight Silicon Nitrade Ignitor

Technical Specs

  • Enhanced humidity control
  • Air filter and humidifier compatibility
  • Ultra-low continuous fan
  • Ultra-low emissions

Efficiency

  • Up to 97.5% AFUE
  • ENERGY STAR qualified

Pricing

  • Lennox furnace pricing: $2,230.00
  • Furnace installed: $3,790
  • Air and heating installation: $8,260

SL280V | Up to 80% AFUE

The SL280V’s two-stage heating calibrates based on outside temperatures. The gas furnace’s SilentComfort technology also helps it operate up to 4.5 times quieter than competing models.

Features

  • Two-stage heating
  • SilentComfort technology
  • Sound-absorbing insulation
  • SureLight Silicon Nitrade Ignitor

Technical Specs

  • Variable-speed motor
  • Insulated blower compartment
  • Enhanced humidity control
  • Air filter and humidifier compatible

Efficiency

  • Up to 80% AFUE
  • Not ENERGY STAR qualified

Pricing

  • Lennox furnace pricing: $1,990.00
  • Furnace installed: $3,150.00
  • Air and heating installation: $5,425.00

SL280NV | Up to 80% AFUE

The SL280NV is a variable-speed, ultra-low emission Lennox gas furnace. Its efficiency, and environmentally-friendly features produce 65% lower NOx emissions. Its variable-speed motor means you’ll experience consistent temperatures throughout your home while maintaining fuel efficiency.

Features

  • Two-stage heating
  • SilentComfort Technology
  • Variable-speed motor
  • SureLight Silicon Nitrade Ignitor

Technical Specs

  • Insulated blower compartment
  • Air filter compatible
  • Humidifier compatible

Efficiency 

  • Up to 80% AFUE
  • Not ENERGY STAR qualified

Pricing

  • Lennox furnace pricing: $1,990.00
  • Furnace installed: $3,150.00
  • Air and heating installation: $5,425.00

EL296V | Up to 96% AFUE

The EL296V is a Lennox gas furnace with a variable-speed, two-stage motor. Its variable-speed airflow means you won’t experience blasts of air when the system starts, and the unit gently disperses heat evenly throughout your home.

Features

  • Two-stage heating
  • Fully-insulated cabinet
  • Variable-speed motor
  • Sealed blower compartment
  • SureLight Silicon Nitrade Ignitor

Technical Specs

  • Enhanced humidity control
  • Air filter and humidifier compatibility
  • Ultra-low continuous fan

Efficiency

  • Up to 96% AFUE
  • ENERGY STAR qualified

Pricing

  • Lennox furnace pricing: $2,230.00
  • Furnace installed: $3,790.00
  • Air and heating installation: $8,260.00

Care and maintenance

Caring for your Lennox furnace involves ensuring it undergoes routine maintenance by an HVAC professional. The company also recommends the following steps. 

Clean your Lennox furnace filters

Keeping your furnace filters clean reduces excessive strain on the unit while simultaneously reducing heating costs and increasing the furnace’s lifespan. You can ensure you have an efficient return-air system by making sure the furnace’s slot has a cover. An HVAC dealer can help determine which filter is best for your furnace.

Keep your furnace clean

One of the essential things you can do regarding care and maintaining your furnace is ensuring that it stays clean. A clean furnace runs efficiently and smoothly. A professional HVAC technician should clean and inspect every part of your furnace. In between visits, vacuum all dirt and dust from your home’s registers.

What to expect during inspections

As part of your furnace’s preventative maintenance, your HVAC technician will perform the following services:

  • Inspecting furnace flames
  • Checking the flue for dents and gaps
  • Removing and cleaning the blower
  • Vacuuming all the blower cavities and burner
  • Brushing and vacuuming blower blades
  • Cleaning the sensor blade

Lennox furnace warranties

SLP98V

  • Limited lifetime warranty on heat exchanger
  • 10-year limited warranty on covered parts

SL297NV

  • Limited lifetime warranty on heat exchanger
  • Five-year limited warranty on Lennox furnace parts

SL280V

  • 20-year limited warranty on heat exchanger
  • 10-year limited warranty on Lennox furnace parts

SL280NV

  • 20-year limited warranty on heat exchanger
  • 10-year limited warranty on Lennox furnace parts

EL296V

  • Limited lifetime warranty on heat exchanger
  • Five-year limited warranty on Lennox furnace parts
  • 10-year limited extended warranty coverage with product registration

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Lennox Furnace Reviews

Showing 16-20 of 237 reviews

"Works fine but too noisy"

2.0 rating
Somewhat Unsatisfied

This furnace is so noisy that my cat hid in the back room for 4 days, hardly coming out or eating. It was installed in a closet in my living room adjacent to my bedroom. The thing makes a horribly loud sound when it comes on, worse when the flame ignites, and worse still when the fan starts. It has a high-pitched whine throughout as well. It is horrible. That said, it works fine, warms the house well. But it has only been 10 days since installation. I wish the contractor had taken the location of the furnace into consideration when they decided which model to install. My neighbor has a new Air-Flo, and it is so quiet that I only noticed the warm air coming out of the vent, never heard it come on, yet it is also in a closet adjacent to their living room.

Cynthia Strain

Highlands, NC

"Lasted only 6.5 years"

1.0 rating
Very Unsatisfied

Our Lennox motor went out in just 6 1/2 years. Not a quality product. I will never own Lennox again!

Scott

Utah

"Lennox the best furnace"

5.0 rating
Very Satisfied

Purchased a Lennox gas furnace and it's still working. The only reason why I'm considering replacing my furnace is because I know it's no longer energy efficient. Otherwise I would not replace it. Two service calls in 23 years, and one of those calls we found it was the thermostat, not the furnace! Lennox is by far the best, even in cold Chicago winters!

M. Perez

Chicago, IL

"Lennox Furnace Keeps Us Warm"

5.0 rating
Very Satisfied

I've owned my Lennox furnace since November 2008. I was moving to this condo from Florida, and my daughter, who lives in this same town where the condo is located, investigated several different brands of furnaces. Of course, we discussed brands, models, and prices over the phone. She and I chose this Lennox model over all the others. She had it installed (replaced the very old furnace in the condo) so the furnace was ready for me when I arrived in February of 2009. I paid for the furnace in 2008. I like this furnace because it is quick to heat and I can adjust the level of heat easily with my Lennox thermostat. I have my furnace served once a year by the same Service Experts who installed it for my daughter. They keep it running nicely for me. Thus, I have no complaints about my Lennox furnace. Regarding repairs, as I mentioned, I have it serviced once a year. It has never needed repairs, only regular maintenance. I would definitely recommend this Lennox furnace model to others and I would certainly buy another Lennox furnace if and when it becomes necessary. Over the years, my family has owned Lennox furnaces and we've always had good service from Lennox equipment.

Salt Lake City, UT

"My Lennox Whisper Heat furnace review"

5.0 rating
Very Satisfied

I am very satisfied with my Lennox furnace. This is the original furnace from when the house was built and I bought in nineteen ninety. It runs quietly and has been for twenty six years now. Whenever the cold weather is upon us, my furnace kicks on every single time it's needed. I have never had a problem with this furnace. No repairs or repairmen have ever been needed. I really like the fact that after all these years, my Lennox furnace runs as quietly and efficient as the first day it kicked on over twenty five years ago. I couldn't be happier. I would highly recommend Lennox furnaces to anyone in need.

Troy,New York

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