SO1: Identify and record challenges for ensuring sustainable IEQ. SO2: Define, design, and implement interactive and engaging digital learning objects to build knowledge and skills in addressing IEQ challenges. SO3: Demonstrate and record SIEQUA-VET results by training personnel in real office buildings and/or hotels and/or hospitals across partner countries. SO4: Ensure long-term viability and scalability of SIEQUA-VET results.