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Colmac Coil operates two U.S. manufacturing facilities that work together to support custom engineering, quality production, and responsive delivery. The Colville, Washington facility serves as the company’s North American headquarters and research and development center, supporting engineering, product development, and manufacturing. Colmac Coil Midwest in Paxton, Illinois expands production capacity and provides a centrally located manufacturing base for efficiently serving customers throughout the Midwest and Eastern United States, including the fabrication and shipment of large custom heat transfer equipment.