New Zealand Commercial Design Trends Series NZ Commercial Design Trends Vol. 30/10A - Page 17

Left:White limestone forms a sculptural staircase in the foyer. The stairs appear to turn upwards and peel off to meet with a ribbon bulkhead that links back to the two entries Below:While natural light illuminates the translucent panels at the ends of the building, the panels at the sides are backlit with LED lighting. A white ceiling reinforces the sense of the foyer being an enclosed white box. Story by Colleen Hawkes Photography by John Gollings also defined by a curved rooftop feature with large Alucobond louvres that reflect different patterns of sunlight at different times of the day. The glazing on another elevation has a stepped form that articulates the levels to which the lift banks rise – there are fewer lifts to the upper levels, which consequently have greater floor areas. Sustainability is another key feature of the project – the tower is the largest building in New South Wales to achieve a 6 Star Green Office Design v2 rating from the Green Building Council of Australia. Even the heritage building benefits, says McPeake. “Legion House receives little sun or wind making these unsuitable as renewable energy sources. Instead, the building receives its energy from a process called biomass gasification.” Legion House utilises the commercial paper waste generated from the ANZ tower. This is shredded and compressed to form paper briquettes, which are used in the gasification plant to produce Syngas. “This is effectively a carbon-zero energy source as the greenhouse gases released in the energy production equal that absorbed in creating the biomass,” the architect says. Other sustainability measures at Liberty Place include two 450kW tri-generation plants that generate electricity, heating and cooling for the air conditioning, hot water systems and high-efficiency chillers. The building also has an active chilledbeam perimeter zone with low temperature VAV central zone, a high-performance thermally shielded glass exterior, rainwater harvesting, scheduled lighting to reduce power consumption, and external sun sensors and automated blinds for glare control. And to ensure a comfortable work environment, the introduction of outside air is 150% of the ventilation rate required by Australian standards. resources & more images 45413 at search fjmt at search | save | share at 15