0000003197 2025-10-28 2025-10-28 false 0000003197 8-K 2025-10-28 CECO ENVIRONMENTAL CORP. DE 000-7099 13-2566064 5080 Spectrum Drive Suite 800E Addison TX 75001 214 357-6181 false false false false Common Stock, par value $0.01 per share CECO NASDAQ false