With the contributions of Gazi University Energy Systems Society (GÜNEST) and Assoc. Prof. Dr. H. İbrahim Variyenli, Faculty Member of our department, a technical visit was made to the Viessmann Combi Boiler Factory in Manisa. Within the scope of the activity, students learned about the skills and competencies required to work in the factory, the installation of heating and cooling systems, which products are used, the locality rate of the products, the factory layout, how the energy needs of the factory are met, the working principle of the systems used, logistics and storage systems.