For more information, contact:

Joe Monkowski Advanced Energy Industries, Inc. 970.407.6252

Marna Shillman Advanced Energy Industries, Inc. 970.407.6280 marna.shillman@aei.com

FEBRUARY 22, 1999 — Advanced Energy Industries, Inc. (AE), announces that it is shifting manufacturing of its high power products used in industrial applications from Fort Collins, Colo., to Voorhees, N.J. These products include power supplies larger than 100 kilowatts, as well as arc-suppression products.

These products are currently manufactured in AE’s Fort Collins plant. Because AE’s facility in Voorhees has the required capacity available, AE plans to move high power manufacturing to New Jersey in the spring of 1999. Engineering and program management for these products will remain in Fort Collins, for the foreseeable future.

Advanced Energy Industries, Inc., is a leading developer and manufacturer of power supplies and related products that are critical in the manufacturing of semiconductors, data storage devices, flat panel computer displays, and other products using thin-film technology. Founded in 1981, AE is a publicly held company. Its stock is traded under the Nasdaq symbol AEIS. The Web site address is www.advanced-energy.com.