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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 V++lp5xrGp69q0opZOVq3J3EExUej4oPKEAJ6ClqAi8Gyyk28MWOC9lneGfr+eht
 DAMOn2XtgQxYw95yFkb5kQ==

<SEC-DOCUMENT>0000820289-09-000024.txt : 20090217
<SEC-HEADER>0000820289-09-000024.hdr.sgml : 20090216
<ACCEPTANCE-DATETIME>20090217070144
ACCESSION NUMBER:		0000820289-09-000024
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20090217
DATE AS OF CHANGE:		20090217

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CECO ENVIRONMENTAL CORP
		CENTRAL INDEX KEY:			0000003197
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL & COMMERCIAL FANS & BLOWERS & AIR PURIFYING EQUIP [3564]
		IRS NUMBER:				132566064
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-19763
		FILM NUMBER:		09606918

	BUSINESS ADDRESS:	
		STREET 1:		3120 FORRER STREET
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45209
		BUSINESS PHONE:		4165936543

	MAIL ADDRESS:	
		STREET 1:		505 UNIVERSITY AVENUE
		STREET 2:		SUITE 1400
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M5G 1X3

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	API ENTERPRISES INC
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ALARM PRODUCTS INTERNATIONAL INC
		DATE OF NAME CHANGE:	19851210

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FRIESS ASSOCIATES LLC
		CENTRAL INDEX KEY:			0000820289
		IRS NUMBER:				830334121

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		115 E. SNOW KING
		CITY:			JACKSON HOLE
		STATE:			WY
		ZIP:			83001
		BUSINESS PHONE:		307-739-9699

	MAIL ADDRESS:	
		STREET 1:		115 E. SNOW KING
		CITY:			JACKSON HOLE
		STATE:			WY
		ZIP:			83001

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FRIESS ASSOCIATES INC
		DATE OF NAME CHANGE:	19990326
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<FILENAME>doc22_13ga-2008.txt
<DESCRIPTION>13G/A 2008 FRIESS ASSOCIATES
<TEXT>
Amendment No. 1

Name of Issuer:
	CECO Environmental Corp.

Type or Class of Security:
	Common

CUSIP Number:
	125141101

1.  Name of Reporting Person
    S.S. or I.R.S. Identification No. of Above Person

	Friess Associates LLC    83-0334121

2.  Check the Appropriate Box if a Member of a Group

	(a)
	(b)

3.  SEC Use Only


4.  Citizenship or Place of Organization

	115 E. Snow King
	Jackson, WY 83001

5.  Sole Voting Power

	0

6.  Shared Voting Power

	n/a

7.  Sole Dispositive Power

	0

8.  Shared Dispositive Power

	n/a

9.  Aggregate Amount Benefically Owned by Each Reporting Person

	0

10. Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares

	n/a

11. Percent of Class Represented by amount in #9

	0.0

12. Type of Reporting Person

	I.A.

By signing below I certify that, to the best of my knowledge and belief,
the securities referred to above were acquired in the ordinary course of
business and were not acquired for the purpose of and do not have the
effect of changing or influencing the control of the issuer of such
securities and were not acquired in connection with or as a participant in
any transaction having such purposes or effect.

Signature

After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete
and correct.

February 13, 2009


William F. D'Alonzo
CEO
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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