The building’s large floor plates meant it was particularly challenging to develop a natural ventilation solution for the office. The ceiling petals create a large surface area in contact with the pipework behind, to raise the chilled water temperature It is only the northern building that incorporates natural ventilation the smaller, southern building does not have an atrium and, as a consequence, is mechanically ventilated. From the floor plates, the air will rise up and out of the central atrium. The fins incorporate acoustically treated vents that open and close to control airflow. Outside air will enter the floor plates through the purpose-designed, vertical bronze fins that line the building’s façade and frame the glazing. One of the more innovative aspects of the design is that the larger, northern building’s expansive, deep-plan floor plates can be ventilated and cooled using natural ventilation. As a result, the nine-storey development is expected to use 73% less water and 35% less energy than a typical office. The scheme features vacuum drainage, a combined heat and power (CHP) system, an absorption chiller and a bespoke chilled ceiling, and it incorporates a hybrid natural-ventilation option. The chilled ceiling enables the natural-ventilation concept to work for extended periods
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