View a complete line of Gas and Oil Furnaces engineered for perfect warmth and efficiency.
See why Lennox® Air Conditioners are among the quietest and most energy-efficient units you can buy.
Enjoy innovation in every season with precise, quietly efficient Lennox® Heat Pumps.
Choose Lennox® Packaged Units when you need a self-contained heating and cooling system that installs outside.
See why Lennox® Air Handlers are among the most efficient and quietest you can buy.
Browse our selection of Boilers, designed to integrate easily with existing radiator or under-floor heating systems.
Explore solutions for making your garage or workspace more comfortable.
Explore the versatility of Mini-Split Systems, ideal for spaces like add-on rooms.
Control allergens and other contaminants with air purification and filtration systems.
Keep humidity at a comfortable level, usually between 30% and 60%, with whole-home humidifiers and dehumidifiers.
Choose a whole-home ventilation system to bring fresh air into your living spaces, without wasting energy.
Get details on filter maintenance and sign up for filter change reminders.
Lennox® furnaces are some of the most efficient and quietest heating systems you can buy*. They’re engineered for perfect warmth and savings.
Explore the Power of Lennox® Furnaces
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.
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.
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.
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 a 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.
SL297NV Variable-Speed, Ultra-Low Emissions Gas Furnace
First-in-class, lowest emission furnace on the market*
ML196E Gas Furnace
Single-stage, 96% fuel-efficient gas furnace with Power Saver™ constant-torque motor design
ML193E Gas Furnace
Single-stage gas furnace with constant-torque motor design for even temperatures and constant efficiency
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.
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.
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.
Exacting precision makes Lennox® air conditioners among the quietest and most energy-efficient units you can buy.
Explore the Precision of Lennox® Air Conditioners
True Comfort Is Precise Comfort®
Even on the most humid days, Lennox Precise Comfort® technology keeps temperatures exactly where you set them, using only the energy that’s needed.
With such powerful cooling capacities, you’d expect Lennox® air conditioners to be loud. But they aren’t. Thanks to SilentComfort™ technology, they’re among the quietest in their class.
*Efficiency claim based on comparison of the average SEER of the SL28XCV as compared to the average SEER of the competitive variable capacity compressor units as published in AHRI (December 2020). Actual system combination efficiency may vary; consult AHRI for exact system efficiencies. Precision claim based on the average cooling capacity range of the SL28XCV as compared to the average cooling capacity of the competitive variable capacity compressor units (December 2020). Averages calculated across 2, 3, 4 and 5 tonnage.
**Efficiency claim based on comparison of air conditioning and heat pump products' SEER as published in AHRI (January 2015). Actual system combination efficiency may vary; consult AHRI for exact system efficiencies. Precision claim based on the cooling capacity range of the XC/XP25-036 units as compared to equivalent-sized competitive variable capacity compressor units.
***Efficiency ratings established per AHRI’s test standard: ANSI/AHRI 210/240-2017 of two-stage central AC/HP equipment.
†Air conditioners/heat pumps have sound ratings established per AHRI’s test standard: AHRI 270-08 (August 2014). The SL18XC1 has the lowest sound rating of any single-stage air conditioner of any major U.S. brand of air conditioner equipment. Efficiency claim based on comparison of single-stage air conditioner products’ SEER as published in AHRI in June 2015. The SL18XC1 has a maximum rated efficiency of 18.50 SEER.
Enjoy innovation in every season with precise, quietly efficient Lennox® heat pumps that keep your life simply perfect.
Explore the Precision of Lennox® Heat Pumps
Perfect Inside, No Matter What’s Outside
Lennox® heat pumps are the smartest solution for milder climates, where they can provide energy-efficient comfort during every season of the year.
Great Savings Happen When Two Energy Sources Work Together
When you combine a compatible Lennox® heat pump with an efficient Lennox® furnace, you can create an energy-saving dual-fuel system. The heat pump functions as both a heating and cooling system, reducing gas fuel consumption. On extra-cold days, the gas furnace becomes the primary heat source, ensuring maximum comfort is maintained.
Stay Comfortable—and Asleep
Peace and quiet are just as much a part of the perfect environment as temperature and humidity. That’s why many Lennox® heat pumps offer SilentComfort™ technology that produces some of the lowest noise levels in the industry.
Lennox® heat pumps are some of the most precise and efficient you can buy. Delivering effective temperature and humidity control, and efficient energy usage, Lennox® heat pumps keep your home’s temperature exactly where you want it. The units work like an all-in-one cooling and heating system, and are perfectly suited to warmer climates. During summer months, the heat pump works like an air conditioner, extracting heat from inside your home and moving it outdoors. When the weather turns cooler, the process is reversed as the unit collects heat from the air outside and transfers it inside. Extremely quiet and exceptionally efficient, Lennox® heat pumps deliver industry-leading efficiencies of up to 23.50 SEER and 10.20 HSPF, which can help save you hundreds of dollars every year in utility costs. For maximum flexibility and energy savings, single fuel and dual fuel models are available. Dual fuel models need to be installed with a compatible furnace, creating a system that can automatically switch back and forth between electricity and gas, based on whichever is most cost-efficient in your area.
*Efficiency claim based on comparison of air conditioning and heat pump products' SEER as published in AHRI (January 2015). Actual system combination efficiency may vary; consult AHRI for exact system efficiencies. Precision claim based on the cooling capacity range of the XC/XP25-036 units as compared to equivalent-sized competitive variable capacity compressor units.
**Efficiency ratings established per AHRI’s test standard: ANSI/AHRI 210/240-2017 of two-stage central AC/HP equipment.
***Air conditioners/heat pumps have sound ratings established per AHRI’s test standard: AHRI 270-08 (February 2015). The SL18XP1 has the lowest sound rating of any single-stage heat pump of any major U.S. brand of heat pump equipment. Efficiency claim based on comparison of single-stage heat pump products’ SEER and HSPF as published in AHRI in June 2015. The SL18XP1 has a maximum rated efficiency of 18.50 SEER and 10.20 HSPF.
Self-contained units engineered for high performance and easy installation
Explore the Versatility of Lennox® Packaged Units.
Ideal Solutions When Indoor Space Is at a Premium
Lennox® packaged units are an all-in-one heating and cooling solution that installs outside, with no indoor furnace or air handler required. They're ideal for homes built on a crawlspace instead of a basement and are perfect for rooftop installation.
Quiet Performance That’s Quite Reliable
Every Lennox® packaged unit comes standard with an internally mounted fan that helps reduce vibrations and keep operating sounds at a minimum.
Lennox® packaged units are an all-in-one heating and cooling solution that’s ideal for homes built on a crawlspace instead of a basement. The units have a compact footprint that allows for a quick installation and blends in with your outdoor environment. Designed with convenience in mind, the units can be installed on a rooftop or outside your home, connecting to your ductwork through a secure opening in the wall. Lennox® packaged units are available in gas/electric, electric/electric, heat pump and dual-fuel models. As efficient as they are versatile, Lennox® packaged units offer efficiencies of up to 16 SEER and 8.20 HSPF, helping you stay energy efficient and comfortable, too. Constructed from the highest quality materials, Lennox® packaged units are ruggedly designed to deliver year after year of reliable, energy-efficient operation. In addition, Lennox® packaged units are compatible with the Lennox Healthy Climate® air purification accessory, which helps to make the air in your home healthier by removing three types of airborne contaminants—particulates, bioaerosols and Volatile Organic Compounds (VOCs).
Lennox® air handlers are among the most efficient and quietest you can buy.
Explore the Advantages of Lennox® Air Handlers
EVENHEATER® preheats air before circulating it through your home. Heat is delivered in stages to help prevent drafts.
Ideal for almost any home, Lennox® air handlers are some of the most efficient and quietest you can buy. Air handlers work with your air conditioner, heat pump or boiler to circulate air evenly throughout your home. During hot weather, the continuous air circulation helps to lower humidity level inside your home for even more comfort. Variable-speed technology allows select Lennox® air handlers to deliver consistent temperatures and steady airflow, while using little energy. For additional comfort, you can add a Lennox EVENHEATER®, which preheats the air before circulating it. And for cleaner, healthier air, you can also add a PureAir™ air purification system, which removes airborne contaminants. Ruggedly constructed and rigorously tested, Lennox® air handlers ensure long lasting and reliable performance. In addition, some Lennox® air handlers are compatible with the iComfort® S30 Smart Thermostat, which delivers unparalleled comfort control and connectivity, whether you’re at home or away.
CBA27UHE Efficient, Multi-Speed Air Handler
Dependable, energy-efficient comfort, even in the harshest conditions
*Based on sound pressure levels during operation of Lennox’s CBA38MV-036 with factory-installed filter compared against 3-ton units of the leading competitors representing the majority of the total air handlers of like class sales volume in North America at equivalent external static pressure when set up per Section 4.5.3 of AHRI’s 260-2001 test standard. Efficiency ratings (CFM/Watt) established per test standard: ANSI/AHRI 210/240-2008.
For homes in northern regions that rely on boilers for heat, there’s no better choice than Lennox®.
Explore the Reliable Heating Performance of Lennox® Boilers
Comfort so Warm and Reliable, You Won’t Mind a Long Winter
Lennox® boilers are designed to integrate easily with existing radiator or under-floor heating systems to offer smart, energy-efficient comfort through even the coldest winters.
Lennox® builds boilers to stand the test of time, which is why you’ll find components like cast-iron heat exchangers and titanium burners. Warmth feels even better when you know it’s going to last.
Lennox® innovation means building a safer, more dependable boiler. That’s why Lennox® boilers don’t use standing pilot lights.
Ideal for homes in northern regions, Lennox® boilers integrate easily with existing radiator or under-floor heating systems for energy-efficient comfort, all winter long. With efficiency ratings of up to 95% AFUE, Lennox® boilers can help you save hundreds of dollars each year in utility bills, compared to older and standard- efficiency boilers. Designed for easy installation, and available in many different sizes and fuel options, all Lennox® boilers are built with high-quality components for long-lasting operation. Every unit is fire-tested and inspected prior to shipping to ensure the highest possible degree of operating reliability. So you can take comfort knowing your Lennox® boiler will deliver dependable performance, season after season, year after year.
With a low-profile design and a range of capacities, Lennox® garage heaters bring reliable and efficient warmth to almost any garage or workspace.
Explore Solutions for Making Your Garage More Comfortable
Ideal for Utility Spaces Large and Small
When it’s cold outside, work still has to get done. Lennox® garage heaters provide a warm, comfortable space to do it. Designed with a low profile, these units operate with cost-effective efficiency that makes them ideal for spaces ranging from home garages to large industrial work areas.
Lennox® garage heaters are offered in multiple sizes, so you’re sure to find the perfect combination of heating capacity and unit placement.
Getting in and out of the car on cold mornings and evenings is more comfortable with a Lennox® garage heater.
A Lennox® garage heater can provide a warm, comfortable environment for pets, with greater safety than a space heater.
T-Class™ TUA separated combustion heaters are available for hard-to-heat applications where excessive dust, dirt, humidity or negative pressure is a concern.
From the industry’s most effective air purifier to the #1 rated filtration system*, there's an innovative solution you can feel good about.
Explore the Versatility of Mini-split Systems
When New Ducts Don’t Make Sense, Mini-splits Do
Lennox® mini–split systems are ideal for spaces like add-on rooms where installing or extending ductwork isn’t practical.
Typical Window Unit
Mounted inside a window frame. Makes your home vulnerable to insects, weather elements and theft.
Lennox® mini-split systems blend in with any room, and a wireless remote makes it easy to stay in your ideal comfort zone.
Lennox® mini-splits are designed to be ultra quiet, because the last thing you want is a noisy sunroom.
Lennox® mini-split heat pumps and air conditioners are ideal for heating and cooling spaces like add-on rooms and sunrooms where installing or extending ductwork isn’t possible. Secure and convenient, mini-split systems are easy to install, using a compact indoor and outdoor unit connected through a small hole in your wall. One outdoor unit can support up to five indoor comfort zones, providing you with a customized whole-home heating or cooling solution. With efficiencies of up to 24.5 SEER and 11.5 HSPF, Lennox® mini-split systems deliver energy-efficient comfort, and may even make you eligible for money-saving rebates. Smooth inverter technology ensures quiet operation and keeps cooled or heated air flowing without the typical starts and stops of conventional systems, virtually eliminating temperature swings. Select mini-split heat pumps also offer outstanding cold-climate capabilities, operating in temperatures as low as -22°F.
MLA Mini-Split Heat Pump
Outstanding cold-climate capabilities, operates in temperatures as low as -22°F
From the industry’s most effective air purifier to the #1 rated filtration system*, there's an innovative solution you can feel good about.
Explore Purification Solutions
Whole-home Solutions for Complete Peace of Mind
Healthy Climate® air purification and filtration systems are designed to work with your central heating and cooling system. They improve the air throughout your entire home—not just in individual rooms—without producing ozone, a known lung irritant*.
The Most Effective Way to Improve Your Air
The PureAir™ air purification system is the only single indoor air quality system to combat all three classes of contaminants.
Allergy-aggravating particles such as dust, pollen and pet dander
Mold and germs that grow and reproduce in damp places, such as basements and crawlspaces
Odours and chemical vapours from paints, cleaning supplies and additives used in carpeting and furniture
PureAir™ reduces and removes contaminants with hospital-grade filtration and a powerful air purification technology called photocatalytic oxidation (PCO).
A Lennox® PureAir™ whole-home air purification system improves indoor air quality better than any single system you can buy. Many technologies only combat one or two categories of air contaminants, and often only in a single room. The PureAir air purification system is the only single indoor air quality system to combat all three classes of indoor air contaminants—particulate, bioaerosols and Volatile Organic Compounds (VOCs). The PureAir air purification system reduces indoor air pollutant levels through a combination of hospital-grade filtration and a contaminate removal process called photocatalytic oxidation (PCO). The process involves three steps. Step one, the Carbon Clean 16® filter captures particles and bioaerosols as small as 0.01 micron, removing them from the airstream. Step two, as the odor-and-chemical-vapor-filled airstream flows through the PCO cartridge, the airstream is exposed to the catalytic surface (titanium-dioxide-coated PureAir cartridge). Step three, the light energy from the UVA lamp and catalyst work together to break down odours and chemical vapours into harmless carbon dioxide and water. Unlike other air purification products on the market, the PureAir system does not produce any ozone as a by-product and actively works to reduce ozone, a known lung irritant.
PureAir S Air Purification System
Sensing and communicating, and cleans the air in your home better than any other single system you can buy
PureAir Air Purification System
Cleans the air in your home better than any other single system you can buy
Healthy Climate Carbon Clean 16® Media Air Cleaner
The healthiest media filter for ozone reduction and filtration of allergens and germs
Healthy Climate 11 Media Air Cleaner
The everyday media filter for allergen-reduction that’s ideal for households with pets
Healthy Climate High-Efficiency Particulate Air (HEPA) Filtration System
Hospital-grade filtration performance
*Leading consumer magazine, January 2012. Based on the published CADR, which is a standardized measurement system to determine the cubic feet of clean air produced per minute.
**U.S. Environmental Protection Agency, "Ozone Generators that are Sold as Air Cleaners: An Assessment of Effective and Health Consequences," August 2006
***According to Title 24 Code in California, MERV 11 filters cannot be used in new equipment installs. Code dictates a new system shall be provided with air filter(s) having a designated efficiency equal to or greater than MERV 13 when tested in accordance with ASHRAE Standard 52.2.
Balanced humidity levels can make your home environment healthier and more comfortable year round. You can save energy, too.
Explore Humidity-control Solutions
More Moisture in the Winter Means More Comfort
A Healthy Climate® humidifier works with your heating system to keep the air inside your home from becoming too dry and causing wintertime chapped skin and respiratory problems. Plus, it’s more effective and easier to maintain than a portable humidifier.
Designed to work with premium Lennox® equipment, the Humiditrol® whole-home dehumidification system uses patented technology to remove excess moisture from your home. Dehumidifiers are also available that work with all brands of heating and cooling equipment.
When your home’s air is properly humidified, your whole home feels better. Lennox® Healthy Climate® whole-home humidifiers and dehumidifiers efficiently control moisture levels in your home without producing ozone, a known lung irritant. In the wintertime, a Healthy Climate whole-home humidifier works with your HVAC system to add humidity to your indoor air, stopping it from becoming too dry and uncomfortable. In the summertime, a Healthy Climate or Humiditrol® whole-home dehumidifier removes excess moisture from the air, making your home feel less sticky and hot. Too much moisture in your home’s air not only makes the atmosphere feel heavy and damp, but it also promotes the growth of mold and mildew, which can aggravate allergy sufferers. Properly dehumidified air is not only healthier and more comfortable, but it can also reduce your summertime energy bills. Dehumidified air feels cooler, so you can set your thermostat at a higher temperature and still feel comfortable. In fact, for every two degrees you raise the temperature during the summer, you can save between 5% and 7% on your cooling bill.
Healthy Climate Whole-Home Power Humidifier
Powerful humidification for enhanced air quality and comfort
Ideal solutions for tightly sealed homes, Healthy Climate® ventilation systems deliver a fresh-air feel, with little or no energy loss.
Explore Ventilation Solutions
A Refreshing Option for Healthier Air
Today’s newer homes are often tightly sealed for efficiency, but this can make the air stuffy. Also, allergens and contaminants can stay trapped inside. Healthy Climate® ventilation systems offer a simple and effective solution, replacing stale indoor air with fresher outdoor air.
With a Healthy Climate® ventilation system, you can easily adjust the amount of fresh air entering your home using simple, intuitive controls.
*U.S. Environmental Protection Agency, "Ozone Generators that are Sold as Air Cleaners: An Assessment of Effective and Health Consequences," August 2006
Air filters are essential components of your heating and cooling system. They help improve the quality of your home’s air and keep your system performing at peak efficiency. The most common air filters are standard disposable cartridges, but advanced filtration systems and air cleaners are also available.
Standard, one-inch disposable air filters should be changed every three months. However, if anyone in your family suffers from allergies, or if you have pets or dust buildup in your home, you might want to change your filters every month or so. Advanced filtration systems have longer life spans and are usually maintained by HVAC professionals.
The process for changing standard disposable filters is fairly straightforward and involves just a few steps:
Locate your air filter Air filters are typically located in your system’s return air vent, which might be on the ceiling, wall or on the side of your furnace or air handler. Your air filter might also be housed inside the unit. If this is the case, you may have to remove an access panel to get to the filter.
Remove the air filter from its housing Simply open the return and pop out the old filter. If there is no filter in the return, measure the length and width of the space, so you’ll know what size filter you’ll need for replacement.
Note the size printed on the air filter frame If you removed an old filter, check its size so you can be sure you have the correct filter for replacement. If you have any questions about the size you need, you can refer to the owner’s manual for your furnace or air handler, or contact your local Lennox® Dealer.
Install the new air filter Securely slide the new filter in place of the old one, making sure you follow the arrows printed on the sides of the filter frame. These arrows point to the direction of the airflow, which should be toward your furnace or air handler.
Get help from your lennox® dealer If you have any questions about where your filter goes, or how to install a new one, your local Lennox® Dealer can help. If you have already replaced your filter, and your system makes excessive noise, contact your Lennox® Dealer to address the problem.