<html><head>
<title>Prepared By R.R. Donnelley Financial -- Form 8-K</title>
</head>
<body Bgcolor="white">

<hr Size="4" Noshade Color="#000000" Align="left">

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="4" Color="#000000">
<b>UNITED STATES </b></font></div>

<div Align="center"><font Face="times New Roman" Size="4" Color="#000000">
<b>SECURITIES AND EXCHANGE COMMISSION </b></font></div>

<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>Washington, D.C. 20549 </b></font></div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="5" Color="#000000">
<b>Form 8-K </b></font></div> <div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="4" Color="#000000">
<b>Current Report </b></font></div>

<div Align="center"><font Face="times New Roman" Size="4" Color="#000000">
<b>Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 </b></font></div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="3" Color="#000000">
<b>Date of Report (Date of earliest event reported):&nbsp;&nbsp;05/08/2006 </b></font></div>




<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="5" Color="#000000">
<b>CECO ENVIRONMENTAL CORP </b></font></div>

<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>(Exact name of registrant as specified in its charter)</b></font></div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="3" Color="#000000">
<b>Commission File Number:&nbsp;&nbsp;0-7099</b></font></div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><table Cellspacing="0" Cellpadding="0" Width="100%" Border="0">
<tr>
<td Valign="bottom" Width="59%" Align="center">
<div Align="center"><font Face="times New Roman" Size="3" Color="#000000"><b>DE</b></font>
</div>
</td>
<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;&nbsp;</font>
</td>
<td Valign="bottom" Width="59%" Align="center">
<div Align="center"><font Face="times New Roman" Size="3" Color="#000000"><b>13-2566064</b></font>
</div>
</td>
</tr>

<tr>
<td Valign="top" Align="center" Width="59%">
<div Style="margin-left:2%; Text-indent:-2%" Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>(State or other jurisdiction of</b></font>
</div>
</td>
<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;&nbsp;</font>
</td>
<td Valign="bottom" Align="center" Width="59%">
<div Align="center"><font Face="times New Roman" Size="2" Color="#000000"><b>(IRS Employer</b></font>
</div>
</td>
</tr>

<tr>
<td Valign="top" Align="center" Width="59%">
<div Style="margin-left:2%; Text-indent:-2%" Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>incorporation)</b></font>
</div>
</td>
<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;&nbsp;</font>
</td>
<td Valign="bottom" Align="center" Width="59%">
<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>Identification No.)</b></font>
</div>
</td>
</tr>

</table></div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="3" Color="#000000">
<b>3120 Forrer Street, Cincinnati, OH 45209</b></font></div>


<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>(Address of principal executive offices, including zip code)</b></font>
</div>

<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="3" Color="#000000">
<b>(416) 593-6543 </b></font>
</div>

<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>(Registrant&#146;s telephone number, including area code)</b></font>
</div>



<div><font Size="1">&nbsp;</font></div>

<div Align="center"><font Face="times New Roman" Size="3" Color="#000000">
<b> </b></font>
</div>

<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>(Former name or former address, if changed since last report) </b></font>
</div>


<div><font Size="1">&nbsp;</font>
</div>




<div Align="left"><font Face="times New Roman" Size="2" Color="#000000">
<b>Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:<BR><BR>
</b></font>


</div>



<div Align="left"><font Face="times New Roman" Size="2" Color="#000000">
<b>[&nbsp;&nbsp;]&nbsp;&nbsp;
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)<BR><BR>

[&nbsp;&nbsp;]&nbsp;&nbsp;
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)<BR><BR>


[&nbsp;&nbsp;]&nbsp;&nbsp;
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))<BR><BR>


[&nbsp;&nbsp;]&nbsp;&nbsp;
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
</b>

</font>
</div>





<div><font Size="1">&nbsp;</font>
</div>

<hr Size="4" Noshade Color="#000000" Align="left">


<p Style='page-break-before:always'>
<p Align="center"><font Size="2">
Information to be included in the report</b>
</font>





<div><font Size="1">&nbsp;</font></div>

<div align="left"><font Face="times New Roman" Size="2" Color="#000000">
<b>Item 3.02.&nbsp;&nbsp;&nbsp;&nbsp;Unregistered Sales of Equity Securities</b></font>
</div>

<div><font Size="1">&nbsp;</font>
</div>

<div  align="left" Style="text-indent:4%"><font Face="times New Roman" Size="2" Color="#000000">
As previously reported, CECO Environmental Corp.(the "Company")issued on December 31, 2001, warrants ("Warrants") to purchase 353,334 shares of our common stock at an initial exercise price of $3.60 per share, to a group of accredited investors led by Crestview Capital Fund L.P., a Chicago-based private investment fund. The Warrants have a five-year term.  On May 8, 2006, two of the holders of Warrants, Crestview Capital Fund L.P. and Crestview Capital Master, LLC exercised their Warrants to purchase 216,667 and 25,000 shares of our common stock, respectively, and the Company has issued said 241,667 shares (the "Warrant Shares"). The Company received $870,001.20 of proceeds from the exercise of such Warrants.<p>The Warrant Shares were issued in a private placement transaction that was exempt from registration under Section 4(2) of the Securities Act of 1933, as amended, and rules promulgated by the Securities and Exchange Commission under Sections 3(b) and 4(2) of the Securities Act of 1933, as amended. <p>The Warrant Shares have been registered for resale on Form S-3 (File No. 333-130294).<p></font>
</div>

<div><font Size="1">&nbsp;</font></div>



<hr  Size="3" Color="#cceeff" Width="100%" Align="center">
<p Align="center"><font Size="2">&nbsp;</font>
<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
<b>Signature(s) </b></font>
</div>

<div><font Size="1">&nbsp;</font></div>

<div align="left" Style="text-indent:4%"><font Face="times New Roman" Size="2" Color="#000000">
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto
duly authorized. </font>
</div>

<div><font Size="1">&nbsp;</font></div>

<div><table Cellspacing="0" Cellpadding="0" Width="100%" Border="0">




<tr>
	<td Valign="top" Colspan="3" Width="53%"> <div Style="margin-left:2%; Text-indent:-2%"><font Face="times New Roman" Size="2" Color="#000000"></font>
	</div>
	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font>
	</td>
	<td> <font Size="1">&nbsp;</font>
	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font>
	</td>	<td Valign="top" Align="center" Width="3%">
	<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
	</font>
	</div>
	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td Valign="top" Width="53%">
	<div Style="margin-left:2%; Text-indent:-2%"><font Face="times New Roman" Size="2" Color="#000000">
	CECO ENVIRONMENTAL CORP</font>
	</div>	</td>
</tr>
<tr><td>&nbsp;</td></tr>
<tr><td>&nbsp;</td></tr>
<tr>
	<td Valign="top" Colspan="3" Width="53%"> <div Style="margin-left:2%; Text-indent:-2%"><font Face="times New Roman" Size="2" Color="#000000">
	Date: May 12, 2006</font>
	</div>
	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font>
	</td>
	<td> <font Size="1">&nbsp;</font>
	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font>
	</td>	<td Valign="top" Align="center" Width="3%">
	<div Align="center"><font Face="times New Roman" Size="2" Color="#000000">
	By:</font>
	</div>
	</td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td Valign="top" Width="53%">
	<div Style="margin-left:2%; Text-indent:-2%"><font Face="times New Roman" Size="2" Color="#000000">
	/s/&nbsp;&nbsp;&nbsp;&nbsp;Dennis W. Blazer</font>
	</div>
	<hr Noshade Align="left" Color="#000000">
	</td>
</tr>

<tr>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="53%">
	<div Style="margin-left:2%; Text-indent:-2%"><font Face="times New Roman" Size="2" Color="#000000">
	Dennis W. Blazer</font>
	</div>
	</td>
</tr>

<tr>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td> <font Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="3%"><font Face="times New Roman" Size="1">&nbsp;</font></td>
	<td Valign="bottom" Width="53%">
	<div><font Face="times New Roman" Size="2" Color="#000000">Chief Financial Officer and Vice President--Finance and Administration</font>
	</div>
</td>
</tr>
<tr><td>&nbsp;</td></tr>
<tr><td>&nbsp;</td></tr>



</table></div>






</body></html>
[{"type": "8-K", "sequence": "1", "filename": "rrd117150.htm", "secsgml_size_bytes": 10831}]
{"company-data": {"conformed-name": "CECO ENVIRONMENTAL CORP", "cik": "0000003197", "assigned-sic": "3564", "irs-number": "132566064", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-07099", "film-number": "06835069"}, "business-address": {"street1": "3120 FORRER STREET", "city": "CINCINNATI", "state": "OH", "zip": "45209", "phone": "4165936543"}, "mail-address": {"street1": "505 UNIVERSITY AVENUE", "street2": "SUITE 1400", "city": "TORONTO", "state": "A6", "zip": "M5G 1X3"}, "former-company": [{"former-conformed-name": "API ENTERPRISES INC", "date-changed": "19920703"}, {"former-conformed-name": "ALARM PRODUCTS INTERNATIONAL INC", "date-changed": "19851210"}]}
Prepared By R.R. Donnelley Financial -- Form 8-K
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 8-K
Current Report
Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported):  05/08/2006
CECO ENVIRONMENTAL CORP
(Exact name of registrant as specified in its charter)
Commission File Number:  0-7099
DE
13-2566064
(State or other jurisdiction of
(IRS Employer
incorporation)
Identification No.)
3120 Forrer Street, Cincinnati, OH 45209
(Address of principal executive offices, including zip code)
(416) 593-6543
(Registrant's telephone number, including area code)
(Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
[  ]  
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
[  ]  
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
[  ]  
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
[  ]  
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
Information to be included in the report
Item 3.02.    Unregistered Sales of Equity Securities
As previously reported, CECO Environmental Corp.(the "Company")issued on December 31, 2001, warrants ("Warrants") to purchase 353,334 shares of our common stock at an initial exercise price of $3.60 per share, to a group of accredited investors led by Crestview Capital Fund L.P., a Chicago-based private investment fund. The Warrants have a five-year term.  On May 8, 2006, two of the holders of Warrants, Crestview Capital Fund L.P. and Crestview Capital Master, LLC exercised their Warrants to purchase 216,667 and 25,000 shares of our common stock, respectively, and the Company has issued said 241,667 shares (the "Warrant Shares"). The Company received $870,001.20 of proceeds from the exercise of such Warrants.
The Warrant Shares were issued in a private placement transaction that was exempt from registration under Section 4(2) of the Securities Act of 1933, as amended, and rules promulgated by the Securities and Exchange Commission under Sections 3(b) and 4(2) of the Securities Act of 1933, as amended.
The Warrant Shares have been registered for resale on Form S-3 (File No. 333-130294).
Signature(s)
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto
duly authorized.
CECO ENVIRONMENTAL CORP
Date: May 12, 2006
By:
/s/    Dennis W. Blazer
Dennis W. Blazer
Chief Financial Officer and Vice President--Finance and Administration