<SEC-DOCUMENT>0001104659-17-072652-index.html : 20171211
<SEC-HEADER>0001104659-17-072652.hdr.sgml : 20171211
<ACCEPTANCE-DATETIME>20171211093728
ACCESSION NUMBER:		0001104659-17-072652
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		2
FILED AS OF DATE:		20171211
DATE AS OF CHANGE:		20171211
GROUP MEMBERS:		BRADLEY F. SIMON
GROUP MEMBERS:		DOUGLAS GRANAT
GROUP MEMBERS:		LAWRENCE A. OBERMAN
GROUP MEMBERS:		STEVEN G. SIMON
GROUP MEMBERS:		STEVEN R. MONIESON

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
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-19763
		FILM NUMBER:		171248609

	BUSINESS ADDRESS:	
		STREET 1:		14651 NORTH DALLAS PARKWAY
		STREET 2:		SUITE 500
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75254
		BUSINESS PHONE:		(513) 458-2600

	MAIL ADDRESS:	
		STREET 1:		4625 RED BANK ROAD
		STREET 2:		SUITE 200
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45227

	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:			Trigran Investments, Inc.
		CENTRAL INDEX KEY:			0001336800
		IRS NUMBER:				363825728
		STATE OF INCORPORATION:			IL
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		630 DUNDEE ROAD
		STREET 2:		SUITE 230
		CITY:			NORTHBROOK
		STATE:			IL
		ZIP:			60062
		BUSINESS PHONE:		8476561640

	MAIL ADDRESS:	
		STREET 1:		630 DUNDEE ROAD
		STREET 2:		SUITE 230
		CITY:			NORTHBROOK
		STATE:			IL
		ZIP:			60062
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>a17-28045_1sc13g.htm
<DESCRIPTION>SC 13G
<TEXT>
Document 1 - file: a17-28045_1sc13g.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-1
<SEQUENCE>2
<FILENAME>a17-28045_1ex1.htm
<DESCRIPTION>EX-1
<TEXT>
Document 2 - file: a17-28045_1ex1.htm

</DOCUMENT>
</SEC-DOCUMENT>