This contribution presents an interdisciplinary and cross-institutional teaching initiative developed by two German universities, aiming to integrate architectural design and HVAC engineering within a sustainability-driven academic framework. Central to the course is an open and explorative Building Information Modeling (BIM) methodology that encourages students to co-design energy-efficient buildings while utilizing a variety of digital tools and platforms. The project framework mirrors real-world construction dynamics by addressing technical coordination, organizational interfaces, and the complexity of collaborative planning processes. Beyond technical knowledge, the course promotes essential Future Skills such as interdisciplinary communication, systems thinking, and digital fluency. By exposing students to practical challenges in a simulated professional context, the initiative enhances their readiness for the demands of a decarbonizing and digitalizing built environment. The results underline the potential of integrated, hands-on teaching formats in fostering a new generation of sustainability-oriented professionals capable of driving transformation in the construction sector.