EXHIBIT 23.1
Consent of Independent Registered Public Accounting Firm
CECO Environmental Corp. and Subsidiaries
Cincinnati, Ohio
We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 of our reports dated March 3, 2021, relating to the consolidated financial statements, and the effectiveness of CECO Environmental Corp. and Subsidiaries’ internal control over financial reporting, appearing in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020.
/s/ BDO USA, LLP
Cincinnati, Ohio
May 25, 2021