The ICR conference is the world’s leading event for research and industry in the HVACR sector taking place every four years. 850 participants from 45 countries participated in the 25th IIR Congress on Refrigeration held in Montreal from 24th to 30th August 2019. In total, 534 oral presentations based on manuscripts were given in 9 workshops which covered all topics relevant for refrigeration including also (high temperature) heat pumps and energy recovery. Additionally, 72 posters were presented.