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Commercial L Series® (LG, LC, LH) Rooftop Units

Designed to Achieve a Low Total Cost of Ownership.

Features and Benefits

  • Standard and high efficiencies available in 3- to 30-tons, up to 13.5 SEER, up to 12.2 EER and up to 14.7 IPLV.
  • ASHRAE 90.1 compliant.
  • Integrated Modular Controller – provides centralized control and fast, simple troubleshooting to reduce operation and service cost.
  • Humiditrol® Dehumidification System – helps control humidity levels, improving comfort and indoor air quality.
  • Multiple Compressors – allow the unit to provide efficient cooling with four-cooling-stage capability.
  • Thermostatic Expansion Valves – provide peak cooling performance across the entire application range for better comfort.
  • Variable-Frequency Drives (available on select tonnages) – provides variable air volume unit operation to meet a variety of zoning system needs.

Reliable Performance

  • Corrosion-Resistant Cabinet – galvanized steel cabinet under a two-layer painted surface protects against rust and corrosion.
  • High- and Low-Pressure Switches – safeguard compressor from extreme operating conditions and unnecessary wear and tear.

Factory-installed Options

  • Humiditrol dehumidification system
  • R-22 or R-410A refrigerant
  • Low- or high-static motors and drives
  • NEMA high-efficiency supply fan motors
  • Coil corrosion protection
  • Refrigerant service valves
  • Stainless steel heat exchanger
  • HACR breakers
  • Variable-air-volume bypass (select models)
  • Variable-frequency drives on supply fan (select models)
  • Systems integration with BACnet® or LonTalk® protocols
  • Novar integration (requires Novar system gateway device)
  • CPC integration (requires CPC system gateway device)
  • Field-installed accessories
  • Standard and high static power exhaust fans (select models)
  • Energy Recovery Systems (wheels)
  • 14″ and 24″ Curbs
  • Combustion air intake and exhaust extensions
  • LPG conversion
  • Coil guards
  • Hail guards
  • Humidity sensor
  • CO2 sensor
  • Temperature sensor
  • UVC germicidal lamp

Factory Options or Field Accessories

  • Economizers
  • Outdoor air dampers
  • Disconnects
  • GFIs
  • Barometric relief
  • Standard powered exhaust (select models)
  • Supply and return smoke detectors
  • Dirty filter switch
  • MERV 8, 11 and 15 filters
  • Fresh air tempering
  • Novar ETM 2051 DDC


  • 15-Year Limited Warranty on stainless steel heat exchanger.
  • 10-Year Limited Warranty on aluminized heat exchanger.
  • 5-Year Limited Warranty on compressor.
  • 3-Year Limited Warranty on Integrated Modular Controller.
  • 1-Year Limited Warranty on covered components.

For more information on HVAC warranties, take a look at our checklist.