We attended a conference in Ohrid, Macedonia, where the topics of the conference were: design of modern ammonia and CO₂ systems, various applications and technological innovations, improving energy efficiency, technical guidelines and safety regulations. It is very clear that by using more ammonia and CO₂ refrigerants, we are employing environmentally friendly technologies. Over 50 speakers from all over the world were presenting their works at the conference including our two presentations presented by Ing. Juraj Švingál ml.