The 13th International Energy Agency (IEA) Heat Pump Conference (HPC2020) took place on April 26 to 29, 2021, as a hybrid event with an online platform in addition to an offline platform at Ramada Plaza Jeju Hotel, Jeju, South Korea. HPC2020 was organized by the Technology Collaboration Programme on Heat Pumping Technologies by International Energy Agency (IEA HPT TCP) and co-organized by the Society of Air-conditioning and Refrigerating Engineers of Korea (SAREK) and Korea National Committee of International Institute of Refrigeration (IIR).