25. Design Drivers to influence Behaviours The atrium is a fundamental component of the internal environmental control strategy and the way in which the organisation of the Building supports the new ways of working Natural buoyancy of warm air in the atrium provides a passive mechanism for moving fresh air through the workspace areas and maximising natural daylighting. The atrium is the vibrant ‘heart’ of the building, providing views between levels that promote an awareness of what other people are doing in different departments on different levels and promoting informal and sometimes unplanned meetings