For the first time in more than 40 years, the 19th edition of the European Conference on the Latest Technologies in Refrigeration and Air Conditioning was staged as a hybrid event on June 10 to 11, 2021. The 19th edition was jointly organized by Centro Studi Galileo (CSG) with United Nations Environment Programme (UNEP), International Institute of Refrigeration (IIR), Air conditioning and Refrigeration European Association (AREA), Italian Association of RAC Technicians – ATF, and Renewable Energy Institute (REI).