EXHIBIT 32.2

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO SECTION 906

OF THE

SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of CECO Environmental Corp. (the “Company”) on Form 10-K for the period ending December 31, 2005, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Dennis W. Blazer, Vice President-Finance and Administration and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Dennis W. Blazer

Dennis W. Blazer

Vice President-Finance and Administration and

Chief Financial Officer

March 30, 2006