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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0000000000-05-039919.txt : 20060915
<SEC-HEADER>0000000000-05-039919.hdr.sgml : 20060915
<ACCEPTANCE-DATETIME>20050803101531
<PRIVATE-TO-PUBLIC>
ACCESSION NUMBER:		0000000000-05-039919
CONFORMED SUBMISSION TYPE:	UPLOAD
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20050803

FILED FOR:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ADVANCED ENERGY INDUSTRIES INC
		CENTRAL INDEX KEY:			0000927003
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRONIC COMPONENTS, NEC [3679]
		IRS NUMBER:				840846841
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		UPLOAD

	BUSINESS ADDRESS:	
		STREET 1:		1625 SHARP POINT DR
		CITY:			FT COLLINS
		STATE:			CO
		ZIP:			80525
		BUSINESS PHONE:		9702214670

	MAIL ADDRESS:	
		STREET 1:		SHARP POINT DRIVE
		CITY:			FORT COLLINS
		STATE:			CO
		ZIP:			80525
</SEC-HEADER>
<DOCUMENT>
<TYPE>LETTER
<SEQUENCE>1
<FILENAME>filename1.txt
<TEXT>


Mail Stop 6010

      August 2, 2005


Mr. Michael EI-Hillow
Chief Financial Officer
Advanced Energy Industries, Inc
1625 Sharp Point Drive
Fort Collins, CO 80525

	RE:	Advanced Energy Industries, Inc.
		Form 10-K for the year ended December 31, 2004
		Filed March 31, 2005
		Form 10-Q for the quarter ended March 31, 2005
      File No. 000-26966

Dear Mr. EI-Hillow:

	We have completed our review of your Form 10-K and related
filings and do not, at this time, have any further comments.


							Sincerely,


							Martin F. James
							Senior Assistant Chief
Accountant


</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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