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Lennox' New L Series® Variable Air Volume Rooftop Unit Offers the Highest Efficiency in the Industry

DALLAS, TX — August 11, 2004 — Lennox continues to deliver industry-leading products with the introduction of the new L Series® variable air volume packaged rooftop unit. With up to a 12.2 Energy Efficiency Rating (EER) and a 15.0 Integrated Part Load Value (IPLV), this new product offers customers the most energy efficient commercial variable air volume unit on the market (1). These units are available in 21-, 25- and 30-ton gas/electric and electric/electric models.

With the highest efficiency rating on the market, it is no surprise that these units also deliver the lowest lifecycle cost (2). These products have been designed to reduce monthly energy bills, lower maintenance time and costs and make installation quick and easy. All these factors contribute to a great return on investment and low total cost of ownership.

The L Series commercial variable air volume rooftops also help provide the customized comfort necessary to help keep employees, customers and tenants happy and healthy. The variable air volume design provides an efficient way to deliver varying amounts of heating and cooling to different areas of the building all at the same time. This helps prevent hot and cold spots in the building and leads to greater comfort levels.

Additional features and benefits of the L Series variable air volume units include:

  • Power exhaust fans for precise control of building pressurization. Models include standard static factory-installed options with propeller fans and high static field installed accessories with centrifugal blowers. The high static fans are capable of delivering up to 100% modulating capacity.
  • Supply variable frequency drive (VFD) bypass control, which allows the unit to operate as a constant air volume unit in case of a VFD failure. This improves unit reliability and helps ensure building occupants remain comfortable at all times.
  • Fresh air tempering capability allows the unit to heat or cool as needed, maintaining the supply air temperature within a comfort range regardless of the thermostat demand.

For more information on L Series commercial variable air volume packaged rooftop units from Lennox, visit www.lennox.com or call 1-800-9-LENNOX.

About Lennox Industries

A worldwide leader in residential and commercial heating and air conditioning systems, Lennox Industries Inc. is based near Dallas, Texas. Lennox Industries is a subsidiary of Lennox International Inc., which operates in more than 100 countries and is a global leader in the heating, ventilation, air conditioning and refrigeration markets. Lennox International stock is traded on the New York Stock Exchange under the symbol "LII".


(1) Commercial gas/electric or electric/electric single-packaged rooftop units, variable air volume, 21 tons (248,000 Btuh) to 30 tons (336,000 Btuh) units. Efficiency ratings established per ARI's test standard: 340/360 95° F outdoor temperature and 80°F db/67° F wb entering evaporator coil air. Claim pertains to EER rating for LCA248H2VS1Y unit. Established through review of competitive literature available to the general public in June 2004.

(2)When considering equipment, installation, maintenance and operation costs for Lennox 3-30-ton rooftop units.

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