Union Thermique

Union Thermique is a French manufacturer and designer of industrial chimneys and heavy boilermaking structures for heating plants, district energy networks, and industrial facilities. Founded in 1921 and headquartered in Gouvernes, France, the company specializes in custom engineering, fabrication, and installation of self-supporting and helicopter-hoisted chimney systems. Its integrated engineering office performs 3D modeling, thermal and vibration analysis, and structural calculations according to European Eurocodes standards. Manufacturing takes place in-house at its dedicated boilermaking workshops, producing single-flue and multi-flue stacks equipped with acoustic silencers and circular sampling platforms. Union Thermique delivers complete turnkey solutions ranging from design and metal rolling to high-reach crane lifting and precision helicopter delivery in constrained environments. Through its specialized subsidiaries, the company also provides maintenance, lining, height extension, and compliance services for existing industrial exhaust systems. Serving major energy, agri-food, and municipal clients across France, Union Thermique delivers robust industrial ducting and flue gas management solutions.