Lennox® Rooftop Systems

Model L

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Energy Optimization

Model L Lennox rooftop units deliver the lowest total cost of ownership through variable-speed components and intelligent operation.

  • Energy-saving efficiency ratings of up to 22.5 SEER, 23.3 IEER, and 15.0 EER are among the highest in the industry.
  • Optimized humidity control with enhanced dehumidification and optional Humiditrol™+ reduces energy usage over traditional hot-gas reheat systems.
  • Qualifies for rebate programs, delivering even more ways to save money.

Engineered Intelligence

The Lennox® CORE Control System delivers connected service, open integration, reliable performance, and efficiency optimization to empower all parts of your organization.

  • Mobile App interface provides intuitive guided setup, reports, and parameter adjustment to optimize unit operation.
  • Open integration and control with standard BACnet IP & MS/TP, LONTalk, thermostats, and all-new wireless sensors allow freedom of choice and custom monitoring and control.
  • Diagnostics and sensor system monitors component performance, tracks capacity and efficiency, and alerts when necessary, enabling smart asset management.

Complete Comfort

Advanced technologies deliver premium comfort and indoor air quality in a wide range of applications.

  • Humiditrol™+, Lennox’s new modulating hot gas reheat dehumidification system, provides energy-efficient dehumidification for superior indoor air quality and year-round comfort.
  • UVC germicidal lights and high-MERV filter options provide indoor air quality solutions for comfortable air in diverse climate zones.
  • Modulating compressors and fans optimize efficiency and comfort to meet space demands in both single-zone and multi-zone VAV applications.

Simple Service

Model L rooftop units maximize the efficiency of maintenance and service operations, reducing operational costs and minimizing downtime.

  • The mobile app interface, Lennox CORE Service App, integrates diagnostic, test, and troubleshooting functionalities, reducing install times over traditional built-in interfaces.
  • DirectPlus™ blower standard up to 12.5 tons eliminates traditional belt-drive maintenance and costs.
  • The Simple Service System offers tool-less filter access, slide-out blower, isolated compressor compartment, and accessible gas compartment, which further reduces service time.

Advanced HVAC Solutions


Model L units feature a lead variable-speed compressor and variable-speed blower to maintain a constant discharge air and room temperature to efficiently deliver complete comfort.

    • Humiditrol+ is a modulating hot-gas reheat dehumidification system that can vary the sensible and latent capacity of the Model L unit to better match the dehumidification demand of the space.
    • Model L units are enabled with enhanced dehumidification (EDH) mode, which is designed to provide additional dehumidification when both cooling and dehumidification demands are present.
    • 3-12.5-ton Model L units are equipped with a direct-drive, variable-speed blower that eliminates maintenance and service costs associated with traditional belt-drive motors.

Ultimate IAQ System

Factory or Field Installed

  • Healthy Climate® High-Efficiency Air Filters
    • Disposable MERV 8, MERV 13, or MERV 16 (Minimum Efficiency Reporting Value based on ASHRAE 52.2) efficiency 2-inch pleated filters
  • Needlepoint Bipolar Ionization (NPBI) Kit
    • NPBI technology integrates with system controls for effective air treatment Ionization has been shown to effectively reduce harmful pathogens, pollutants, and odors. Brush-type ionizer introduces a high concentration of both positive and negative ions into the air stream
    • These bipolar ions are then dispersed into the occupied space through the duct system proactively reducing the airborne contaminants.
    • Ions travel within the building air stream and attach to particles, pathogens, and gas molecules, making them larger and easier to capture in the filtration system
    • UL 2998 certified for zero ozone emission
  • Healthy Climate® UVC Germicidal Lamps
    • Germicidal lamps emit ultra-violet (UV-C) energy, which has been proven to be effective in reducing microbes such as viruses, bacteria, yeasts, and molds. This process either destroys the organism or controls its ability to reproduce
    • UV-C energy greatly reduces the growth and proliferation of mold and other bioaerosols (bacteria and viruses) on illuminated surfaces (particularly the coil and drain pan)


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Intelligent Operation

Enlight™ rooftop units powered by the Lennox® CORE Control System create a bright future through a highly energy-efficient and environmentally sustainable design. Comprehensive configurations meet a wide range of applications, making it the most flexible product line Lennox has to offer.

Application Flexibility

The Enlight™ lineup gives you the flexibility to choose exactly the right configuration for your application.

  • Comprehensive product line consisting of 3-25 ton gas-electric, electric-electric, and 2-20 ton heat pump, and dual fuel heat pump models makes Enlight™ your go to brand.
  • Configure to order options tailor the unit to your application requirements reducing installation time
  • Humiditrol® Dehumidification System provides excellent humidity control in the toughest applications

Sustainable by Design

The Enlight™ family is engineered to minimize environmental impact through exceptional efficiency and sustainable design.

  • Energy-saving efficiency ratings of up to 18.0 SEER, 17.0 IEER, and 13.5 EER qualify for energy rebates and incentives, making it easier for your organization to meet your financial and sustainability goals
  • Environ™ Coil System contains up to 52% less refrigerant and is up to 59% lighter than traditional coil systems reducing the overall environmental impact
  • Standard MSAV® supply fan technology can provide up to 75% fan power savings* while improving comfort

Engineered Intelligence

The Lennox® CORE Control System delivers connected service, open integration, reliable performance, and efficiency optimization to empower all parts of your organization.

  • Lennox® CORE Unit Controller optimizes unit operation in real-time by processing advanced sensor inputs, maximizing energy efficiency and space comfort.
  • Mobile App Interface provides intuitive guided setup, reports, and parameter adjustment to optimize unit operation.
  • Open integration and control with standard BACnet® IP & MS/TP, LonTalk®, thermostats, and wireless sensors allows freedom of choice and custom monitoring and control.

Simple Service

Enlight™ rooftop units maximize efficiency of maintenance and service operations, reducing operational costs, and minimizing downtime.

  • Mobile app interface integrates diagnostic, test, and troubleshooting functionalities, reducing install times over traditional built-in interfaces.
  • Direct drive blower standard up to 12.5 tons eliminates traditional belt drive maintenance and service costs.
  • The Simple Service System offers tool-less filter access, slide out blower, isolated compressor compartment, and accessible gas compartment which further reduce service time.


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Proven Reliability, Superior Serviceability

Xion™ Rooftop Units are designed for quick field adaptability, making them ideal for fast turnaround commercial applications. The Lennox standard – reliable performance and year-round comfort packaged within a serviceable design.

Roof Ready

Xion™ rooftop units are designed to fit your application needs. These units come with a range of convenient features that make installation quick and easy.

  • Field flexibility with more than 100 field-installed accessories allows quick modification of units to fit the application
  • Installation made easy with self-sealing insulated base and minimized plumbing through a convertible drain pan

Reliable Performance

Xion™ rooftop units are engineered with the right technologies and options to meet standard efficiency requirements while delivering reliable performance and year-round comfort.

  • Environ™ coil system designed by Lennox® uses proven technologies to provide reliable performance and stand up to the rigors of everyday use year after year.
  • MSAV® supply fan technology optimizes system performance by staging airflow to provide year-round comfort and power savings of up to 61% over traditional blower systems.
  • Humiditrol® dehumidification technology offers an optional humidity control system that efficiently removes moisture from the air to create a healthier and more comfortable indoor environment.

Simple Service

Xion™ rooftop units maximize efficiency of maintenance and service operations, reducing operational costs, and minimizing downtime.

  • Slide-out blower motor reduces installation time and is easy to service.
  • Isolated compressor compartment allows performance check while unit is working, without interrupting airflow.
  • Accessible gas compartment provides quick and convenient access to all gas compartments

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                      Jim Lubratt

                      President & Chief Executive Officer

                      Jim Lubratt has been president of SVL since 2006. He first joined the company as a sales engineer in 1992 and was made a partner in 2000. He holds a Bachelor of Science in mechanical engineering from Southern Methodist University and first entered the HVAC industry as a marketing engineer for a heat pump manufacturer in Texas.

                      In addition to his role at SVL, Jim is vice president of AQC Industries, LLC, a manufacturer of specialized underground ductwork systems. He is also an investor and board member for Hydromx, Inc., a manufacturer of heat transfer nanofluids, and Crotega, Inc., creators of personal and building security solutions.

                      Jim and his wife, Tracy, met in college and married in 1993. They have three children, two of whom have graduated college in Texas, while their youngest is attending Grand Canyon University in Arizona.

                      Outside of work, Jim places a priority on his faith, family, friends, and fitness. He enjoys helping people-supporting charities, time with his wife and kids, road-biking with friends and efforts to stay physically fit.

                      A message from Jim on the achievements of SVL

                      SVL started in February 1967 by Charlie Schwab and Craig Vollhaber. Schwab-Vollhaber, Inc. (as it was named at the time) steadily grew and, in 1985, welcomed Paul Lubratt as another partner, becoming Schwab-Vollhaber-Lubratt, Inc. SVL’s founders had the determination to build the most talented, customer-focused HVAC representative in the Midwest. Our original drive and passion still shape the company and culture to this day. The achievements of an organization are the results of the combined efforts of every individual. From humble beginnings, SVL founders paved the way to industry success with hard work and determination. “Today, SVL is strongly organized with great people to lead our industry forward as we are challenged with fast-paced changes to reduce our environmental impact,” says Jim. Now, 55+ years later, SVL is under the leadership of two new principals who share the same vision and drive that has propelled SVL throughout the years. Built on a foundation of integrity, Jim Lubratt, and Charlie Vollhaber strive to ensure opportunities for personal growth, improved work environment, and shared life enrichment. The achievements of our organization are the results of the combined efforts of every individual.

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                      Charlie Vollhaber

                      Executive Vice President & Officer

                      Charlie Vollhaber is a third-generation employee at SVL, as a grandson of company co-founder Craig Vollhaber and son of former CEO Todd Vollhaber. Charlie holds a Bachelor of Science in mechanical engineering and an MBA, both from the University of Minnesota. He became an outside salesman for SVL in 2013, was made a partner in 2019, and then executive vice president and officer in 2022.

                      He grew up playing sports, including football, basketball, golf, and track, and enjoys the competitive nature of the HVAC industry. “I like that no two days are ever the same as there are always questions to answer and problems to solve,” he says. “Most of all, I enjoy working with great people and coordinating together on challenging projects to achieve positive results together.”

                      Outside of work, Charlie enjoys spending time with his wife, Lesley, and their three boys. He’s also fond of golfing, traveling, and attending concerts and sporting events. One of his favorite quotes is from the book of Philippians: “Do nothing from selfish ambition or conceit, but in humility count other more significant than yourselves. Let each of you look not only to his own interests, but also to the interests of others.” Because HVAC and construction is such a team effort, he says, “this mindset helps to create positive results in a vast majority of situations.”

                      A message from Charlie on the culture of SVL

                      “At SVL, we strive to cultivate a unique culture that revolves around finding and empowering exceptional individuals. We believe in equipping our team members with the right tools and resources to succeed.

                      As we’ve grown the business, we have deliberately maintained a small firm culture, fostering an environment where collaboration thrives. We encourage open dialogue and promote a sense of comfort among our employees, allowing anyone to ask questions and seek guidance from anyone else, regardless of their level within the organization.

                      We foster a workshop-like atmosphere where everyone’s contribution is valued. Presenting your work to another individual or a group of teammates provides a platform for collaboration, where ideas are shared, dissected, and improved collectively. We firmly believe in the power of mentoring and provide various avenues for both formal and informal guidance. Whether it’s through structured training programs or casual conversations, we encourage team members to discuss a wide range of topics, from work-related successes or issues to everyday personal life topics.

                      In summary, our culture is built on the foundation of attracting exceptional individuals, empowering them with the necessary tools, and fostering a collaborative environment where mentorship and growth thrive. We are committed to creating an atmosphere where every team member feels supported, valued, and encouraged to reach their fullest potential.”

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                      Al Gramse

                      Vice President of SVL Service Corporation

                      Al Gramse has been in the HVAC industry for over 30 years. He began as a service technician.  Then over his career worked in technical support, building automation, then service manager prior to his current role.

                      How did Al end up in the HVAC industry?  “After high school, I took a couple years to figure out what I wanted to do.   Where I was working at the time, a grumpy old coworker, who I didn’t get along with, walked up to me and said ‘What are you doing here?  Go back to school.’”  I said, “For what?”  He said “There’s a tech school down the street.  Go down there and pick something that interests you”. Then he walked away.  That weird interaction, with someone I didn’t get along with, sent me down a 30-year path in the HVAC industry.   Never underestimate the potential of a little encouragement.   Even if it is from a strange source.

                      Al has been with SVL for 15 years and is the head of our SVL Service division. “The people here are some of the best in the industry,” Al says. “A bunch of team-oriented, knowledgeable, go-getters.” His personal mantra is “figure it out,” “Do a little fact-finding on your own. Use your own brain before you use someone else’s. But know when to ask for help.” he prescribes. “It’s amazing what you can accomplish on your own if you dig in a little bit.”

                      Outside of work, Al has lots of outdoor hobbies, including hunting, fishing, and motorcycling, though his favorite pastime is simply hanging out with family.

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                      Jennifer Roach

                      Director of Creative Services

                      Jen Roach brings 30 years of marketing and leadership experience to her work directing the creative team at SVL. A graduate of South St. Paul High School, she holds a Bachelor of Arts in visual communication and design from Brown College.

                      She began her career in graphic design before moving into an art director role with Dayton Hudson Corporation. Later, she became creative director at an advertising agency working on recreational vehicle accounts, before taking in-house creative director positions first at Gander Mountain and then at HOM Furniture.

                      Jen joined SVL in 2021, during a time of major growth for its marketing team. “My style is ‘servant-leadership’, putting my team’s needs before my own, doing whatever I can to make them feel valued and secure,” she says. “I think it drives stronger working relationships, builds trust, and produces higher quality work. I want the team to care about the company, the work, and each other.”

                      Outside of work, Jen enjoys spending time with her husband, Scott, and son, Crew. Together they love weekend getaways, being outside, riding bikes, gardening, baking, and traveling to wrestling tournaments to cheer on Simley High School. She recently constructed her forever home in Cottage Grove and now spends her free time as a weekend reno warrior.

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