June 4, 2010

CECO ENVIRONMENTAL ANNOUNCES
R-SERIES ROTARY OXIDIZER

CINCINNATI, OHIO, June 4, 2010 - CECO Environmental Corp. (NasdaqGM: CECE), a leading provider of air pollution control and industrial ventilation systems, announced today that it has officially launched a new product called the “R-Series”. This rotary device can operate as a regenerative thermal oxidizer (RTO), a regenerative catalytic oxidizer (RCO), or a thermally efficient selective catalytic reduction (TESCR) system. Oxidizers destroy volatile organic compounds (VOCs) whereas selective catalytic reduction removes nitrous oxides (NOx) from airstreams.

This new product is ideal for industries such as painting, coil coating, food processing, chemical processing, composites, semiconductor manufacturing, odor control, pharmaceutical, printing and converting, fiberglass manufacturing, petrochemical, hydrocarbon processing, etc.

Jeff Lang, Chief Executive Officer, stated, “We are very pleased that our in-house research and engineering teams have jointly developed this new unit. The new “R-Series” valve technology that is utilized in this unit provides a cost effective alternative to the existing installed base of single housing valve RTO/RCO systems. The new product has already generated significant interest in the marketplace.”

ABOUT CECO ENVIRONMENTAL

CECO Environmental Corp. is North America's largest independent air pollution control company. Through its subsidiaries -- Busch, CECOaire, CECO Filters, CECO Abatement Systems, kbd/Technic, Kirk & Blum, Effox, GMD, Fisher-Klosterman, Flextor and A.V.C. Specialists -- CECO provides a wide spectrum of air quality services and products including: industrial air filters, environmental maintenance, monitoring and management services, and air quality improvements 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 Corp., please visit the company's web site at www.cecoenviro.com.

Contact: Corporate Information
Jeff Lang, CECO Environmental Corp.
Email: investors@cecoenviro.com
http://www.cecoenviro.com
1-800-333-5475

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, include changes in market conditions in the industries in which the Company operates. 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.