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 6-10 of 237 reviews

"Costco Lennox Heating & Airconditioning Installed October 2017"

5.0 rating
Very Satisfied

We had a Engineer Chris who give us an estimate on replacing our York Heating and air conditioner. This was our third company giving an estimate. What was impressive, is Chris was the only one who asked us a series of questions. It was what he needed to give us the system that would best suit our needs. Chris was very professional, and extremely knowledgeable. Two months after the installation, he came back to look over the entire installation, and asked us if we were satisfied. Our new Lennox, is quieter, it will circulate the air from the living room to the back bedrooms when using the fireplace. We went with 80% efficiency, because after talking to Chris, it was the best in meeting our needs. The installers Rob and Scott, worked all day without a break, and did a great job. We are Costco members, and went through Costco. Both my husband and I couldn't be happier with our choice.

Donna Simale

Schaumburg, IL

"Just installed"

1.0 rating
Very Unsatisfied

Just has it installed, gives off great heat, but it's noisy. The reviews said it was quiet, that's not true. It sounds like a jet engine shutting down when it shuts down, and it comes through the vents in my house and a constant hum, like the hum of the jet engine. Way too loud, my wonderful installer has come back 3 times to try to fix it, even changed out parts and reworked vents, nothing has helped. It is terrible

L Millr

Calgary Alberta

"Big Mistake"

1.0 rating
Very Unsatisfied

Purchased furnace on November 14, 2013 & paid over $8,000. I'm on a fixed income so made no interest payments for six months. On November 2, 2015 the condensed pump went out (only one year warranty on this part) it wasn't covered & I paid $312 to get it replaced. On October 2014 furnace wouldn't work & repairman charged $147 to diagnosis problem. The inside blower needed to be replaced. Part was under warranty but labor was $356. The furnace is still under warranty & it's already breaking down. My recommendation to anyone is to look at a different brand & avoid this one at all costs!

Lynda Erickson

Everett, WA

"New Construction"

1.0 rating
Very Unsatisfied

New construction & our furnace has only seen 3 winters. 2Nd year a sensor broke & needed replacing. This year (October) the igniter burnt up due to a completely fried motherboard. Needed to replace both. Parts & labor not covered for first repair and labor $300 for last repair not covered. Waited 3 days in 35 degree weather for part to arrive. Cringe at the thought of next season. Will never purchase this furnace again & am tempted to call our builder to complain.

Anne

Minnesota

"Wonderful Furance"

5.0 rating
Very Satisfied

Pascal and his helper installed it in a day. The City will inspect Wednesday. First I noticed how quiet is is. I have the fan running at about 30% to get rid of the smells from the vent glue, but in a few days that will be gone. Love it, it's so quiet. Would recommend it to anyone.

L Millr

Calgary, Alberta

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