By Month 18, GreeNest has delivered its core enabling frameworks, prototypes and design-stage validations, in line with the planned project phase.
A comprehensive regulatory and assessment framework has been established, including a harmonised KPI system covering operational energy use, greenhouse gas emissions, embodied carbon, circularity, indoor environmental quality, economic and societal aspects. This framework is consistently applied across all demonstration cases.
Inventory-driven and context-specific design methodologies, including DesignByInventory and DeltaSmart, have been operationalised and applied to all demo buildings. Through parametric simulations and KPI-based evaluation, multiple combinations of passive and active technologies were analysed and final ZeB solution sets were selected for each site. Design-stage results demonstrate that ZeB operational performance can be achieved compared to NZEB baselines.
The GreeNest ecosystem is structured around 17 Standardised Packages covering material innovations, envelope systems, energy systems, digital tools and construction processes. Key material packages include KARZ coffee-ground insulation, waste-wood structural elements, WDLT slab with earth screed, SmartWall and EcoTechWall systems, Heat Harvest and Reversible Windows, and Light Clay prefabricated earth modules. Energy and building services packages include advanced photovoltaic systems and heat-pump-based heating, cooling and storage. Digital and process packages include the ASSESS decision-support tool, NestControls monitoring and automation system, GreeNest BIM Database, BIM Suite and digital twin environment, and circular construction and value-chain integration methods.
Several packages, notably KARZ, Light Clay, SmartWall and EcoTechWall, have been developed and prototyped, representing concrete exploitable results addressing embodied carbon reduction and circularity.
A fully operational digital ecosystem has been established, enabling structured data exchange, integration of Standardised Packages and preparation for real-time monitoring. The NestControls system has been developed and tested in a sandbox environment, providing readiness for energy, comfort and indoor air quality monitoring.
The ecosystem is validated through four demonstration cases: the Berlin Museum Pavilion (Germany), the Athens Sandbox Building (Greece), the Delta Info Center in Porto Viro (Italy), and the North Aegean Youth Recreational Center (Greece). Each demo applies a tailored combination of packages selected through KPI-based assessment, demonstrating adaptability and replicability across climates, building types and local value chains.
Societal and skills-related impacts have been initiated through Living Lab activities, hands-on workshops and training, particularly focused on circular construction and Light Clay techniques.
