Safe Harbor

The Private Securities Litigation Reform Act of 1995 provides a "safe harbor" for forward-looking statements. Certain information included in this communication, and other materials filed or to be filed with the United States Securities and Exchange Commission ("SEC") (as well as information included in oral or other written statements made or to be made by Met-Pro Corporation), contain statements that are forward-looking. Such statements may relate to plans for future expansion, business development activities, capital spending, financing, the effects of regulation and competition, or anticipated sales or earnings results. Such information involves risks and uncertainties that could significantly affect results in the future and, accordingly, such results may differ from those expressed in any forward-looking statements made by or on behalf of the Company. These risks and uncertainties include, but are not limited to, those relating to, the risk and uncertainties as to whether the merger agreement signed with CECO Environmental Corp. ("CECO") will be completed, and the likely adverse impact upon the Company's stock price if the merger agreement is not completed; the ability of CECO to successfully integrate the operations of the Company and to realize the synergies from the acquisition; the results of CECO's operations pending the completion of the merger transaction between it and the Company, including its ability to integrate acquisitions that it recently completed; the various risks that are identified in CECO's registration statement on Form S-4 filed with the SEC on May 23, 2013 and any amendments thereto that are thereafter filed, all of which are incorporated herein by reference; the cancellation or delay of purchase orders and shipments, product development activities, goodwill impairment, computer systems implementation, dependence on existing management, the continuation of effective cost and quality control measures, retention of customers, global economic and market conditions, and changes in federal or state laws. You should carefully consider the factors discussed in Part I, "Item 1A Risk Factors" in our Annual Report on Form 10-K for the year ended January 31, 2013 as well as Part II, "Item 1A Risk Factors" in our Quarterly Report for the quarter ended April 30, 2013 as filed with the SEC and the registration statement on Form S-4 filed by CECO on May 23, 2013 and any amendments thereto.

Important Information for Investors and Stockholders

This communication shall not constitute an offer to sell or the solicitation of an offer to buy securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of such jurisdiction.  This communication is not a substitute for the prospectus/proxy statement filed with the SEC by CECO on May 23, 2013.  Investors in Met-Pro or CECO are urged to read the prospectus/proxy statement, which contains important information, including detailed risk factors. The prospectus/proxy statement and other documents filed by Met-Pro and CECO with the SEC are available free of charge at the SEC's website, www.sec.gov, or by directing a request to Met-Pro Corporation, P.O. Box 144, Harleysville, Pennsylvania 19438, Attention: Investor Relations; or to CECO Environmental Corp., 4625 Red Bank Road, Suite 200, Cincinnati, Ohio 45227, Attention: Investor Relations. A final prospectus/proxy statement will be mailed to shareholders of Met-Pro and CECO's stockholders.

Proxy Solicitation

Met-Pro and CECO, and certain of their respective directors, executive officers and other members of management and employees are participants in the solicitation of proxies in connection with the proposed transactions. Information about the directors and executive officers of Met-Pro is set forth in its proxy statement for its 2013 annual meeting of shareholders and Met-Pro's Form 10-K for the year ended January 31, 2013. Information about the directors and executive officers of CECO is set forth in the proxy statement for its 2013 annual meeting of shareholders and CECO's 10-K for the year ended December 31, 2012. Investors may obtain additional information regarding the interests of such participants in the proposed transactions by reading the prospectus/proxy statement for such proposed transactions filed by CECO in the Form S-4 filed on May 23, 2013.