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Proc-Type: 2001,MIC-CLEAR
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<SEC-DOCUMENT>0001193125-06-158051.txt : 20060801
<SEC-HEADER>0001193125-06-158051.hdr.sgml : 20060801
<ACCEPTANCE-DATETIME>20060801152852
ACCESSION NUMBER:		0001193125-06-158051
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20060801
DATE AS OF CHANGE:		20060801

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:	333-130294
		FILM NUMBER:		06994330

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>d424b3.htm
<DESCRIPTION>SUPPLEMENT NO.3
<TEXT>
<HTML><HEAD>
<TITLE>Supplement No.3</TITLE>
</HEAD>
 <BODY BGCOLOR="WHITE">

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="right"><FONT FACE="Times New Roman" SIZE="2">Filed pursuant to 424(b)(3) </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="right"><FONT
FACE="Times New Roman" SIZE="2">Registration #333-130294 </FONT></P> <P STYLE="margin-top:24px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">SUPPLEMENT NO. 3 </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px"
ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">DATED AUGUST 1, 2006 </FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">TO THE PROSPECTUS DATED MARCH 31, 2006 </FONT></P> <P
STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">OF CECO ENVIRONMENTAL CORP. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">Up to 2,392,334
Common Shares </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman" SIZE="2">We are providing this Supplement No.&nbsp;3 to you in order to supplement our prospectus. This Supplement updates
information in the &#147;Selling Stockholders&#148; section of our prospectus. This Supplement No.&nbsp;3 supplements, modifies or supercedes certain information contained in our prospectus dated March&nbsp;31, 2006, as amended by Supplement
No.&nbsp;1 and Supplement No.&nbsp;2 dated April&nbsp;12, 2006 and May&nbsp;12, 2006, respectively, and must be read in conjunction with our prospectus as amended. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT
FACE="Times New Roman" SIZE="2">The purpose of this Prospectus Supplement is to amend the &#147;Selling Stockholders&#148; section beginning on page 8 of the Prospectus in order to reflect the transfer of Investor Warrants by Friedman Investment
Group, LLC, a selling stockholder, to Crestview Capital Master, LLC and the substitution of Crestview Capital Master, LLC as a selling stockholder. Crestview Capital Master, LLC is an existing Selling Stockholder. Except as amended by the Prospectus
Supplement, the &#147;Selling Stockholder&#148; section of the Prospectus is not affected by this Prospectus Supplement. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman" SIZE="2">Our shares of
common stock are traded on the Nasdaq Capital Market under the symbol CECE. On July&nbsp;25, 2006, the closing sales price of our shares of common stock on Nasdaq was $8.00 per share. </FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px"><FONT
FACE="Times New Roman" SIZE="2"><B><U>Consider carefully the risk of factors beginning on page 3 in the Prospectus before investing in our securities. </U></B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px"><FONT FACE="Times New Roman"
SIZE="2"><B>This Prospectus Supplement should be read in conjunction with the Prospectus as amended and this Prospectus Supplement is qualified in its entirety by reference to the Prospectus as amended except to the extent that the information
contained herein modifies or supersedes the information contained in the Prospectus. Capitalized terms used in this Prospectus Supplement and not otherwise defined herein shall have the same meaning specified in the Prospectus. </B></FONT></P> <P
STYLE="margin-top:12px;margin-bottom:0px"><FONT FACE="Times New Roman" SIZE="2"><B>Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed on the adequacy or
accuracy of the Prospectus and this Prospectus Supplement. Any representation to the contrary is a criminal offense. </B></FONT></P> <P STYLE="margin-top:12px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2"><B>The date of
this prospectus supplement is August 1, 2006. </B></FONT></P>

<p Style='page-break-before:always'>
<HR  SIZE="3" COLOR="#999999" WIDTH="100%" ALIGN="CENTER">

 <P STYLE="margin-top:0px;margin-bottom:0px" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">SUBSTITUTION OF SELLING STOCKHOLDERS </FONT></P> <P
STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman" SIZE="2">The reference to Friedman Investment Group, LLC in the selling stockholder table in the section of the Prospectus entitled <I>&#147;Selling
Stockholders&#148; </I>beginning on page 8 of the Prospectus is deleted. The table below sets forth, with respect to the substituted selling stockholder for Friedman Investment Group, LLC, as of the date of this prospectus supplement its name and
certain beneficial ownership information. Friedman Investment Group, LLC transferred all of its Investor Warrants for 16,667 shares of Common Stock to Crestview Capital Master LLC. </FONT></P> <P
STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman" SIZE="2">Percentage beneficial ownership is based on 11,217,780 shares of common stock outstanding as of May&nbsp;4, 2006. Beneficial ownership is calculated
based on SEC requirements. </FONT></P> <P STYLE="font-size:12px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE CELLSPACING="0" CELLPADDING="0" WIDTH="100%" BORDER="0" ALIGN="center">

<TR>
<TD WIDTH="65%"></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD>
<TD VALIGN="bottom" WIDTH="5%"></TD>
<TD></TD></TR>
<TR>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="3" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Shares<BR>Beneficially&nbsp;Owned<BR>Before Offering</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ROWSPAN="2" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Number of<BR>Shares<BR>Being&nbsp;Offered</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" COLSPAN="3" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Shares<BR>Beneficially&nbsp;Owned<BR>After Offering</B></FONT></TD></TR>
<TR>
<TD VALIGN="bottom"> <P STYLE="margin-right:0px;margin-top:0px;margin-bottom:1px;border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Selling Stockholders</B></FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Number</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Percent</B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Number<SUP>1</SUP></B></FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center" STYLE="border-bottom:1px solid #000000"><FONT FACE="Times New Roman" SIZE="1"><B>Percent</B></FONT></TD></TR>
<TR BGCOLOR="#cceeff">
<TD VALIGN="top"> <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:1.00em; text-indent:-1.00em"><FONT FACE="Times New Roman" SIZE="2">Crestview Capital Master LLC</FONT><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><SUP>2,
3</SUP></FONT><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"></FONT></P> <P STYLE="margin-top:0px;margin-bottom:0px; margin-left:1.00em; text-indent:-1.00em"><FONT FACE="Times New Roman" SIZE="2">95 Revere Drive</FONT></P> <P
STYLE="margin-top:0px;margin-bottom:0px; margin-left:1.00em; text-indent:-1.00em"><FONT FACE="Times New Roman" SIZE="2">Suite F</FONT></P> <P STYLE="margin-top:0px;margin-bottom:1px; margin-left:1.00em; text-indent:-1.00em"><FONT
FACE="Times New Roman" SIZE="2">Northbrook, IL 60062</FONT></P></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">16,667</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">*</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">16,667</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">0</FONT></TD>
<TD VALIGN="bottom"><FONT SIZE="1">&nbsp;&nbsp;</FONT></TD>
<TD VALIGN="bottom" ALIGN="center"><FONT FACE="Times New Roman" SIZE="2">*</FONT></TD></TR>
</TABLE> <P STYLE="font-size:6px;margin-top:0px;margin-bottom:0px">&nbsp;</P>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2">*</FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2">Less than 1% </FONT></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2"></FONT><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><SUP>1</SUP></FONT><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">Assumes sale of all shares of common stock offered hereby. </FONT></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2"></FONT><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><SUP>2</SUP></FONT><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">Crestview Capital Partners, LLC (&#147;CCP&#148;) is the sole managing member of Crestview Capital Master LLC (&#147;CCM&#148;) and may be deemed to have sole voting
and investment power with respect to the securities beneficially owned by CCM. CCP disclaims beneficial ownership of these securities. The Managing Members of CCP are Stewart Flink, Robert Hoyt and Daniel Warsh, each of whom may be deemed to have
voting and dispositive power over securities beneficially owned by CCM, and each of whom also disclaims beneficial ownership of these securities. CCM is also deemed to be the beneficial owner of the shares beneficially owned by Crestview Capital
Fund L.P. being offered hereunder. CCM also owned 25,000 shares offered hereunder, which have been sold. </FONT></TD></TR></TABLE>
<TABLE STYLE="BORDER-COLLAPSE:COLLAPSE" BORDER="0" CELLPADDING="0" CELLSPACING="0" WIDTH="100%">
<TR>
<TD WIDTH="4%" VALIGN="top" ALIGN="left"><FONT FACE="Times New Roman" SIZE="2"></FONT><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><SUP>3</SUP></FONT></TD>
<TD ALIGN="left" VALIGN="top"><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><SUP></SUP></FONT><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">All of the numbers of shares of common stock listed are shares of common stock issuable upon
exercise of Investor Warrants held by CCM. </FONT></TD></TR></TABLE> <P STYLE="margin-top:12px;margin-bottom:0px; text-indent:4%"><FONT FACE="Times New Roman" SIZE="2">Mr.&nbsp;Flink is an affiliate of a registered broker-dealer, Dillon Capital,
Inc. CCM purchased the Investor Warrants to be resold in the ordinary course of business, and there are no arrangements with any other persons, whether directly or indirectly, to dispose of the Investor Warrants or the common stock underlying the
Warrants. </FONT></P>
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</DOCUMENT>
</SEC-DOCUMENT>
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