Exhibit 99.1

NasdaqGM:CECE NEWS RELEASE

CECO ENVIRONMENTAL REPORTS

SECOND QUARTER AND SIX MONTH 2011 RESULTS

Company Achieves Quarterly Net Income of $2.0 Million and Announces

Share Buyback Program

CINCINNATI, OHIO, AUGUST 11, 2011 - CECO Environmental Corp. (NasdaqGM:CECE), a leading provider of air pollution control systems, today announced second quarter and six month results for the period ended June 30, 2011. Additionally, the Company announced approval by its Board of Directors of a share buyback program authorizing the purchase of up to 0.5 million shares of CECO common stock over an eighteen month period.

Financial highlights for the second quarter of 2011 compared to the second quarter of 2010 include:

Net sales were $32.5 million compared to $34.8 million in the comparable quarter;

Gross profit increased to $8.7 million from $8.4 million;

Gross margin increased to 26.8% from 24.1%;

Selling & administrative expenses were reduced by $1.2 million to $5.7 million;

Selling & administrative expenses as a percent of sales decreased from 19.8% to 17.5%;

Operating income increased to $2.8 million from $1.4 million in 2010;

Operating margin increased to 8.6% from 4.0% in 2010;

Net income was $2.0 million compared to net income of $0.6 million in 2010;

Net income per diluted share was $0.12 compared to net income per diluted share of $0.04 in 2010;

Bookings increased by 7% to $33.5 million compared to $31.3 million in 2010;

Cash and cash equivalents increased to $8.4 million with only $0.3 million in bank debt; and

Backlog as of June 30, 2011 was $52.6 million compared to $51.6 million as of March 31, 2011.

Financial highlights for the six months ended June 30, 2011 compared to six months ended June 30, 2010 include:

Net sales were $68.5 million compared to $69.8 million for the comparable period in 2010;

Gross profit increased to $17.2 million from $16.4 million;

Gross margin increased to 25.1% from 23.5%;

Selling & administrative expenses were reduced to $11.7 million from $14.1 million;

Selling & administrative expenses as a percent of sales decreased from 20.2% to 17.1%;

Operating income increased to $5.3 million from $2.0 million in 2010;

Operating margin increased to 7.7% from 2.9% in 2010;

Net income was $3.2 million compared to net income of $0.7 million in 2010;

Net income per diluted share was $0.20 compared to net income per diluted share of $0.05;

Year-to-date bookings increased by 14% to $66.8 million compared to $58.4 million in 2010.

Our year-over-year bookings have increased by 14% and we are showing significant increases in gross margins and operating margins for the three and six month periods ended June 30, 2011.

“I am very pleased with the results from the second quarter and the ongoing improvement in financial performance that the Company has achieved,” commented CECO’s Chief Executive Officer, Jeff Lang. “Our slightly lower revenues in the quarter are the result of our intentional pruning of lower margin customer segments from our backlog, primarily in our Contracting/Services Group. Nevertheless, we expect that revenues will increase as our domestic and global sales initiatives take effect.”

Mr. Lang continued, “We continue to realize the positive results from global growth, streamlining and gross margin enhancement that we began implementing last year. Additionally, nearly 32% of our 2011 bookings were from international customers which provides further proof that our global expansion initiatives continue to be successful.”

CECO will host a conference call on Thursday, August 11, 2011 at 8:30 a.m. EDT to review its financial results for the quarter. Conferencing details are as follows:

Dial in number:	800-901-5259
International dial in number:	617-786-4514
Participant passcode:	65043320
Replay:	888-286-8010
International:	617-801-6888
Passcode:	63652961

ABOUT CECO ENVIRONMENTAL

CECO Environmental Corp. is North America’s largest independent air pollution control company. CECO provides a wide spectrum of air quality services and products including: industrial air filters, environmental maintenance, monitoring and management services, and air quality improvement systems. CECO is a full-service provider to the steel, military, aluminum, automotive, ethanol, aerospace, electric power, semiconductor, chemical, cement, metalworking, glass, foundry and virtually all industrial process industries.

For more information on CECO Environmental please visit the company’s website at http://www.cecoenviro.com

Contact:

Corporate Information

Jeff Lang, CECO Environmental Corp.

Email: investors@cecoenviro.com

1-800-333-5475

CECO ENVIRONMENTAL CORP.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(unaudited)

Dollars in thousands, except per share data

	THREE MONTHS ENDED JUNE 30,						SIX MONTHS ENDED JUNE 30,
	2011			2010			2011			2010
Net sales	$	32,537		$	34,776		$	68,493		$	69,797
Cost of sales		23,839			26,377			51,322			53,381
Gross profit		8,698			8,399			17,171			16,416
Selling and administrative		5,741			6,904			11,688			14,138
Amortization		112			125			223			260
Income from operations		2,845			1,370			5,260			2,018
Other income, net		360			32			333			(53	)
Interest expense (including related party interest of $59 and $59, and $118 and $118, respectively)		(284	)		(308	)		(574	)		(601	)
Income from continuing operations before income taxes		2,921			1,094			5,019			1,364
Income tax expense		968			417			1,808			520
Income from continuing operations		1,953			677			3,211			844
Loss from discontinued operations, net of tax		0			(95	)		0			(165	)
Net income	$	1,953		$	582		$	3,211		$	679
Per share data:
Basic income from continuing operations	$	0.14		$	0.05		$	0.22		$	0.06
Basic loss from discontinued operations		0.00			(0.01	)		0.00			(0.01	)
Basic net income	$	0.14		$	0.04		$	0.22		$	0.05
Diluted income from continuing operations	$	0.12		$	0.05		$	0.20		$	0.06
Diluted loss from discontinued operations		0.00			(0.01	)		0.00			(0.01	)
Diluted net income	$	0.12		$	0.04		$	0.20		$	0.05
Weighted average number of common shares outstanding:
Basic		14,334,116			14,304,047			14,324,040			14,299,598
Diluted		17,141,633			17,111,818			17,117,440			14,393,750

CECO ENVIRONMENTAL CORP.

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

Dollars in thousands, except per share data

	JUNE 30, 2011			DECEMBER 31, 2010
Current assets:
Cash and cash equivalents	$	8,439		$	5,792
Accounts receivable, net		20,061			26,772
Costs and estimated earnings in excess of billings on uncompleted contracts		10,569			8,345
Inventories, net		5,381			4,432
Prepaid expenses and other current assets		2,819			2,509
Assets held for sale		0			526
Current assets of discontinued operations		67			76
Total current assets		47,336			48,452
Property and equipment, net		5,643			5,880
Goodwill		14,776			14,713
Intangibles – finite life, net		715			966
Intangibles – indefinite life		3,233			3,225
Deferred income tax asset, net		602			602
Deferred charges and other assets		754			953
	$	73,059		$	74,791
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Current debt	$	317		$	0
Accounts payable and accrued expenses		14,337			17,041
Billings in excess of costs and estimated earnings on uncompleted contracts		5,496			7,810
Accrued income taxes		1,158			1,646
Total current liabilities		21,308			26,497
Other liabilities		2,322			2,320
Convertible subordinated notes (including related parties notes of $3,950)		10,600			10,800
Total liabilities		34,230			39,617
Shareholders’ equity:		—			—
Preferred Stock, $.01 par value; 10,000 shares authorized, none issued
Common stock, $0.01 par value; 100,000,000 shares authorized, 14,479,917 and 14,456,659 shares issued in 2011 and 2010, respectively		145			144
Capital in excess of par value		43,463			43,237
Accumulated deficit		(3,032	)		(6,243	)
Accumulated other comprehensive loss		(1,391	)		(1,608	)
		39,185			35,530
Less treasury stock, at cost, 137,920 shares in 2011 and 2010		(356	)		(356	)
Total shareholders’ equity		38,829			35,174
	$	73,059		$	74,791

This press release may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All forward-looking statements are subject to certain risks, uncertainties and assumptions. These risks and uncertainties, which are more fully described in CECO’s Annual and Quarterly Reports filed with the Securities and Exchange Commission, and

include, but are not limited to: our dependence on fixed price contracts and the risks associated therewith, including actual costs exceeding our estimates and our method of accounting for contract revenue; our history of losses and possibility of further losses; fluctuations in operating results from period to period due to seasonality of our business; the effect of growth on our infrastructure, resources, and existing sales; our ability to expand our operations in both new and existing markets; the potential for contract delay or cancellation; the potential for fluctuations in prices for manufactured components and raw materials; the impact of federal, state or local government regulations; economic and political conditions generally; and the effect of competition in the air pollution control and industrial ventilation industry. Should one or more of these risks or uncertainties materialize, or should the assumptions prove incorrect, actual results may vary in material aspects from those currently anticipated. We caution investors that other factors might, in the future, prove to be important in affecting our results of operations. New factors emerge from time to time and it is not possible for management to predict all such factors, nor can it assess the impact of each such factor on the business or the extent to which any factor, or a combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. Investors are further cautioned not to place undue reliance on such forward-looking statements as they speak only to our views as of the date the statement is made. Except as required by law, we undertake no obligation to publicly update or revise any forward-looking statements, whether because of new information, future events or otherwise.