Network Appliance Prevents Pollution and Earns Acterra Business Environmental Award

Sunnyvale, Calif. - April 22, 2004 -- Network Appliance, Inc. (NASDAQ: NTAP), a leading provider of enterprise network storage solutions, today announced it has been awarded the Susanne Wilson Award for Pollution Prevention/Resource Conservation by Acterra, a leading San Francisco Bay Area environmental organization. NetApp received the award for excelling in implementing and promoting pollution prevention. The award reinforces the ongoing Network Appliance ecological commitment to its community and employees.

Founded in 1990, Acterra's Business Environmental Awards highlight and honor innovative programs and outstanding achievements that contribute to a sustainable Bay Area. The Susanne Wilson Award is given to companies to reward improvements in operation or production processes which reduce the consumption of resources (water, materials, and energy) and minimize the generation of toxic and/or persistent pollutants.

The Acterra Board of Directors selected Network Appliance for the design of its new data center, which included innovative energy-efficient primary and backup power and cooling systems for the company's mission-critical operations. In particular, key design elements that included the NetApp on-site cogeneration using natural gas engines, battery-free UPS using rotary flywheel technology, and absorption chillers utilizing environmentally benign silica gel as a refrigerant were some of the emerging design technologies incorporated into the design. Cogeneration, also known as combined heat and power (CHP), is the simultaneous production of electricity and heat from the same fuel or energy. Facilities with cogeneration systems, such as the Network Appliance data center, produce their own electricity and use excess heat for process steam, hot water heating, space heating, and other thermal needs, thereby increasing resource efficiency and reducing energy consumption.

Award judges cited the company's cogeneration system, chiller, UPS selection, and numerous other energy-efficient features as "key factors" in their selection criteria. According to judges, the company demonstrated a commitment to the environment with the implementation of its unique data center design and recognized the blueprint as a model for other companies to follow for environment preservation. "Network Appliance is dedicated to innovation, be it the development of the world's first unified storage solution or the design of a unique energy solution that contributes to a healthy environment," said Dan Hoffman, design and construction manager at Network Appliance. "We are honored to be recognized for our efforts and hope we can share what we have learned so others can help to preserve our ecological surroundings."

The Business Environmental Network is a program of Acterra, a Palo Alto-based nonprofit environmental organization formed from the September 2000 merger of Bay Area Action and the Peninsula Conservation Center Foundation.

About Network Appliance

Network Appliance is a world leader in unified storage solutions for today's data-intensive enterprise. Since its inception in 1992, Network Appliance has delivered technology, product, and partner firsts that continue to drive "The evolution of storage.™" Information about Network Appliance™ solutions and services is available at www.netapp.com.

Press Contact:

Jaime Leigh Le
Network Appliance Inc.
(408) 822-3761
jle@netapp.com