Model L™

Ultimate Performance, Comfort, and Control

The Model L™ rooftops feature the revolutionary Lennox® CORE Unit Controller and advanced variable-speed technology to maximize energy savings. But that’s just the beginning. Premium diagnostic features reduce installation, service and maintenance expenses to provide the lowest total cost of ownership in the industry.

  • Awards
  • Awards
  • Awards
  • Awards
  • Awards
  • Awards
  • Awards
  • Awards

Explore in 3D

See full range of powerful features of Model L™ Rooftop Units

Explore 3d
Play Play

Variable-Speed Compressor

Lead variable-speed compressor matches the load in the space to reduce compressor cycling while delivering superior comfort and efficiency.

Play Play

DirectPlus™ Blower System

Fully variable, high-efficiency motor with a direct-mounted, backwards-curved impeller that provides exceptional performance and lower service and operating costs. Slide out blower provides simple service on 7.5- 12.5-ton models.

Play Play

Lennox® CORE Control System

Designed to accelerate equipment install and service. Standard with all Model L rooftop units, CORE integrates key technologies that lower install costs, drive system efficiency, and enable smarter asset management.

Play Play

High Efficiency Air Filters

Improve filtration with optional MERV 13 and 16 filters which are proven to be more effective at trapping particulates in the air.


Model L 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.

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.

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.

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.


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.

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)

See Ultimate IAQ White Paper

Model L™ Ultra-High Efficiency Rooftop Units

California Residents - 3 - 5 Ton G/E Models Only

For installation in SCAQMD only: This furnace does not meet the SCAQMD Rule 1111 NOx emission limit (14 ng/J), and thus is subject to a mitigation fee of up to $450. This furnace is not eligible for the Clean Air Furnace Rebate Program: in new window) .