57th International HVAC&R Congress and Exhibition 2026 will be held from 9th - 11th December 2026 at Belgrade Fair in Belgrade, Serbia. This is a premier annual event with a 50-year legacy, serving as a vital hub for the heating, ventilation, air conditioning, and refrigeration industry in Central and Southeast Europe. It merges a high-level scientific congress with a commercial exhibition. It focuses on the "Green Transition," exploring carbon neutrality, energy efficiency, and the integration of renewable energy sources into building systems. Participants engage in technical sessions and workshops addressing the evolution of refrigerants, indoor air quality (IAQ), and smart building automation, making it a critical platform for professional networking and technological exchange.