Alper Güneç, Meliha Rigan, Elif Mendi, Ali Osman Aydınnarı and Sena Ozal 2025. EFFICIENCY ENHANCEMENT IN THE RECUPERATOR OF A REHEATING FURNACE: Received: 3rd October 2025, Revised: 30th October 2025, 5th November 2025, Accepted: 12th November 2025, Date of Publication: 4th December 2025. MATTER: International Journal of Science and Technology. 11, (Dec. 2025), 75–84. DOI:https://doi.org/10.20319/mijst.2025.11.7584.