0000003197 2023-09-29 2023-09-29 0000003197 false 8-K 2023-09-29 CECO ENVIRONMENTAL CORP. DE 000-7099 13-2566064 14651 North Dallas Parkway Suite 500 Dallas TX 75254 214 357-6181 false false false false Common Stock, par value $0.01 per share CECO NASDAQ false