Tema 0: Keynote Speakers Marco Pinzon (UNEP): Connecting the HVACR Industry with the Global Agenda Andrés Sepúlveda (ASHRAE): The Commissioning Process to deliver High-Performing Buildings Paulo Ferrão (U. Lisboa): The role of Buildings Digital Twin models in designing Carbon Neutral Cities Raul Häner (EUROVENT): The importance of the IAQ Gameiro da Silva (U. Coimbra): Ferramenta de Avaliação do Risco na Exposição a Biocontaminantes Frank Hovorka (REHVA): GHG emissions reduction: what translation into HVAC design? Didier Coulomb IIR/IIF): Refrigeration, including air conditioning, at the heart of a sustainable development Eduardo Maldonado (U. Porto): Challenges and needs to decarbonize the Buildings Sector by 2050 Tema 1: Edifícios e Sistemas de Alto Desempenho e Sustentáveis