Furnaces

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

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.

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.

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. 

"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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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:
$$$$

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:

The quietest furnace in its class ***

Rating:
Efficiency Rating (AFUE):
80.0
Price Guide:
$$$

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

Rating:
Efficiency Rating (AFUE):
80.0
Price Guide:
$$$
Availability:

High-efficiency, variable-speed gas furnace

Rating:
Efficiency Rating (AFUE):
96.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$$

Two-stage furnace with Power Saver™ technology

Rating:
Efficiency Rating (AFUE):
96.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$$

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

Rating:
Efficiency Rating (AFUE):
up to 80.0
Price Guide:
$$

Single-stage furnace with Power Saver™ technology

Rating:
Efficiency Rating (AFUE):
96.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$$

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

Rating:
Efficiency Rating (AFUE):
95.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$$
Availability:

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

Rating:
Efficiency Rating (AFUE):
up to 80.0
Price Guide:
$$

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:
$

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

Rating:
Efficiency Rating (AFUE):
96.0
ENERGY STAR® Qualified:
ENERGY STAR logo
Price Guide:
$

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:
$

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

Rating:
Efficiency Rating (AFUE):
up to 80.0
Price Guide:
$

Economical gas furnace with Power Saver™ technology

Rating:
Efficiency Rating (AFUE):
80.0
Price Guide:
$

Variable-speed oil furnace

Rating:
Efficiency Rating (AFUE):
85.0
Price Guide:
$$$

Quiet and efficient oil furnace

Rating:
Efficiency Rating (AFUE):
83.0
Price Guide:
$$
  • * Based on sound pressure levels during steady-state, high-fire and low-fire operation of Lennox® SLP99UH070XV36B as of March 2020 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 SLP99UH090XV60C and leading competitive units listed in AHRI directory as of December 2019. Efficiency ratings established per test standard ANSI/ASHRAE 103-1993.
  • ** Lennox’ SL97UH40NV36B, 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).
  • *** Based on sound pressure levels during steady-state, high-fire operation of Lennox SL280UHV070V36A and leading competitive units at mid-point temperature rise and minimum external static pressure when set up per Section 4.5.3 of AHRI 260-2001.

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