Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
Board of Directors and Shareholders
CECO Environmental Corp. and Subsidiaries
Cincinnati, Ohio
We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 333-33270, 333-143527, 333-159948, 333-200000, and 333-206743) of CECO Environmental Corp. and Subsidiaries’ of our reports dated March 14, 2017, relating to the consolidated financial statements, and the effectiveness of CECO Environmental Corp. and Subsidiaries’ internal control over financial reporting, which appear in this Form 10-K.
/s/ BDO USA, LLP
Chicago, Illinois
March 14, 2017