<SEC-DOCUMENT>0001193125-15-272920-index.html : 20150731
<SEC-HEADER>0001193125-15-272920.hdr.sgml : 20150731
<ACCEPTANCE-DATETIME>20150731160209
ACCESSION NUMBER:		0001193125-15-272920
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		9
FILED AS OF DATE:		20150731
DATE AS OF CHANGE:		20150731

FILER:

	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:		424B3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-204816
		FILM NUMBER:		151019358

	BUSINESS ADDRESS:	
		STREET 1:		4625 RED BANK ROAD, SUITE 200
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45227
		BUSINESS PHONE:		4165936543

	MAIL ADDRESS:	
		STREET 1:		2300 YONGE STREET, P.O. BOX 2408
		STREET 2:		SUITE 1710
		CITY:			TORONTO
		STATE:			A6
		ZIP:			M4P 1E4

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>d920123d424b3.htm
<DESCRIPTION>424B3
<TEXT>
Document 1 - file: d920123d424b3.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>2
<FILENAME>g920123g06q02.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 2 - file: g920123g06q02.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>g920123g20l12.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: g920123g20l12.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>4
<FILENAME>g920123g22b92.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 4 - file: g920123g22b92.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>5
<FILENAME>g920123g26u17.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 5 - file: g920123g26u17.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>6
<FILENAME>g920123g26y75.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 6 - file: g920123g26y75.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>7
<FILENAME>g920123g34d73.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 7 - file: g920123g34d73.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>8
<FILENAME>g920123g51k68.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 8 - file: g920123g51k68.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>9
<FILENAME>g920123g68i59.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 9 - file: g920123g68i59.jpg

</DOCUMENT>
</SEC-DOCUMENT>