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Lennox® furnaces are some of the most efficient and quietest heating systems you can buy*. They’re engineered for perfect warmth and savings.

woman reading Explore the power of Lennox® Furnaces
Illustration of Consistently Perfect

Consistently Perfect

Consistently Perfect

Innovations like Precise Comfort® technology allow the furnace to keep the temperature held exactly where you want it. Heat is even throughout your home, with no cold spots. If it sounds perfect, it's because it is.

See how it works

At up to 99 percent, "efficient" is an understatement

More efficient than anything the industry has ever seen, Lennox furnaces boast an efficiency rating of up to 99% — that means it essentially converts every last bit of energy it uses into heating the home.

The money-saving power of dual-fuel operation

When a gas furnace is installed with a compatible Lennox heat pump, it creates a heating system that can switch back and forth between electricity and gas automatically, based on whichever is the most cost-efficient for the weather conditions at the time.

The money-saving power of dual-fuel operation

Technology that gives you peace

SilentComfort™ technology utilizes variable-speed technology, which ramps up gradually and eliminates the sudden “kick” or blast of air upon startup. SilentComfort also features a specially designed fan guard and fan blades to reduce air noise and sound levels. 

Technology that gives you peace

"Living with this furnace has been surreal. It is behind the scene silently keeping this older house super comfortable...We have gone through one month with a substantial savings in gas consumption, could be close to half the cubic feet of gas for the degree days experienced this month."

-DougGH, Vancouver, Canada
Lennox® gas and oil furnaces promise unsurpassed comfort. Innovative design and technology automatically adjusts outputs in precise and minute increments to hold temperatures exactly where you want them. As quiet as they are efficient, Lennox furnaces combine advanced technology, engineering and sound-absorbing insulation to ensure whisper-quiet operation. Offering industry-leading efficiencies, Lennox furnaces can help save you hundreds of dollars in utility costs every year. Some Lennox furnaces are ENERGY STAR® certified, which may qualify you for federal energy tax credits and local utility rebates. No other manufacturer can match our products for efficiency, comfort, precision, quiet and customer satisfaction. Available in variety of types, from a variable-capacity gas furnace to a two-stage gas furnace, and a variety of oil furnaces, Lennox offers a range of options to meet everyone’s heating needs.
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Lennox SLP99V Variable-Capacity Gas Furnace
Dave Lennox Signature® Collection

The quietest and most efficient furnace you can buy *

Rating:
Efficiency Rating (AFUE):
up to 99.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$$$$
SL297NV Variable-Speed, Ultra-Low Emissions Gas Furnace
Dave Lennox Signature® Collection

First-in-class, lowest emission furnace on the market ***

Rating:
Efficiency Rating (AFUE):
up to 97.5
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$$$
Availability:
Regional
SL280V Variable-Speed Gas Furnace
Dave Lennox Signature® Collection

The quietest furnace in its class ‡

Rating:
Efficiency Rating (AFUE):
up to 80.0
Price Guide:
$$$
SL280NV Variable-Speed, Ultra-Low Emissions Gas Furnace
Dave Lennox Signature® Collection

First-in-class, lowest emission furnace on the market **

Rating:
Efficiency Rating (AFUE):
up to 80.0
Price Guide:
$$$
Availability:
Regional
EL296V High-Efficiency, Two-Stage Gas Furnace
Elite® Series

High-efficiency, digital, two-stage, variable-speed gas furnace

Rating:
Efficiency Rating (AFUE):
up to 97.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$$
Elite® Series

High-efficiency, two-stage, constant-torque gas furnace

Rating:
Efficiency Rating (AFUE):
up to 97.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$$
EL296V High-Efficiency, Two-Stage Gas Furnace
Elite® Series

High-efficiency, variable-speed gas furnace

Rating:
Efficiency Rating (AFUE):
up to 96.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$$
EL296E High-Efficiency, Two-Stage Gas Furnace
Elite® Series

Two-stage furnace with Power Saver™ technology

Rating:
Efficiency Rating (AFUE):
up to 96.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$$
EL280E Gas Furnace
Elite® Series

Two-stage gas furnace with constant-torque motor design for even temperatures

Rating:
Efficiency Rating (AFUE):
up to 80.0
Price Guide:
$$
EL196E Gas Furnace
Elite® Series

Single-stage furnace with Power Saver™ technology

Rating:
Efficiency Rating (AFUE):
up to 96.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$$
EL195NE Ultra-Low Emissions Gas Furnace
Elite® Series

First-in-class, lowest emission furnace on the market **

Rating:
Efficiency Rating (AFUE):
up to 95.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$$
Availability:
Regional
EL180NE Ultra-Low Emissions Gas Furnace
Elite® Series

First in class, lowest emission furnace on the market **

Rating:
Efficiency Rating (AFUE):
up to 80.0
Price Guide:
$$
ML296V Gas Furnace
NEW! Merit® Series

Two-Stage, 97% Variable-Speed Gas Furnace that Heats the Home Evenly and Efficiently

Rating:
Efficiency Rating (AFUE):
up to 97.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$
ML296V Gas Furnace
Merit® Series

Variable-speed gas furnace that heats the home evenly and efficiently

Rating:
Efficiency Rating (AFUE):
up to 96.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$
ML196E Gas Furnace
Merit® Series

Single-stage, 96% fuel-efficient gas furnace with Power Saver™ constant-torque motor design

Rating:
Efficiency Rating (AFUE):
up to 96.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$
ML193E Gas Furnace
Merit® Series

Single-stage gas furnace with constant-torque motor design for even temperatures and constant efficiency

Rating:
Efficiency Rating (AFUE):
up to 93.0
ENERGY STAR® Qualified:
U.S. South Region
Price Guide:
$
ML180V Gas Furnace
Merit® Series

Single-stage, 80% fuel-efficient gas furnace with variable-speed fan motor

Rating:
Efficiency Rating (AFUE):
up to 80.0
Price Guide:
$
ML180E Gas Furnace
Merit® Series

Economical gas furnace with Power Saver™ technology

Rating:
Efficiency Rating (AFUE):
up to 80.0
Price Guide:
$
  • * Furnace model numbers designated with a ‘K’ (SLP99VK) indicate the equipment contains an on board refrigerant detection system. Identical furnace model numbers without a ‘K’ (as shown above) indicate an identical product as to key aspects of the equipment, including rating, performance, and specifications, but specifically exclude an on board refrigerant detection system.
  • ** Lennox’ SL297UH40NV36B, EL195UH100NE60C, SL280UH100NV60C, and EL180UH040NE36A units are the first commercially available natural Gas-Fired Fan type Central Furnaces to meet a NOx emission limit of 14 nanograms per Joule (ng/J).
  • *** Furnace model numbers designated with a ‘K’ (SL297NVK) indicate the equipment contains an on board refrigerant detection system. Identical furnace model numbers without a ‘K’ (as shown above) indicate an identical product as to key aspects of the equipment, including rating, performance, and specifications, but specifically exclude an on board refrigerant detection system.
  • † Based on sound pressure levels during steady-state, high-fire and low-fire operation of Lennox SLP98UH070XV36B and leading competitive units as of July 2013 at mid-point temperature rise and minimum external static pressure when set up per Section 4.4.4 of AHRI 260-2012. Based on AFUE efficiency rating of Lennox SLP98UH090XV60C and leading competitive units listed in AHRI directory as of March 2015. Efficiency ratings established per test standard ANSI/ASHRAE 103-1993.
  • ‡ Furnace model numbers designated with a ‘K’ (SL280VK) indicate the equipment contains an on board refrigerant detection system. Identical furnace model numbers without a ‘K’ (as shown above) indicate an identical product as to key aspects of the equipment, including rating, performance, and specifications, but specifically exclude an on board refrigerant detection system.

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