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v3.25.1

Acquisitions - Schedule of Unaudited Pro Forma Financial Information (Details) - Environmental Integrated Solutions [Member] - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Business Acquisition [Line Items] |  |
Net sales | $ 176,697 | $ 163,957
Net income attributable to CECO Environmental Corp. | $ 35,984 | $ 310
Earnings per share: |  |
Basic | $ 1.03 | $ 0.01
Diluted | $ 0.98 | $ 0.01

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