CH2 has been designed to reflect the planet’s ecology, which is an immensely complex system of interrelated components. Just as it is impossible to assess the role of any part of this ecology without reference to the whole, CH2 comprises many parts that work together to heat, cool, power and water the building, creating a harmonious environment.
For example, in nature, dark colours absorb heat and hot air rises. Accordingly CH2‘s north façade will comprise 10 dark coloured air extraction ducts that absorb heat from the sun, helping stale air inside rise up and out of the building.
The south façade will comprise light-coloured ducts that draw in fresh air from the roof and distribute it down through the building. Staff will be able to control the flow of this 100 per cent fresh air to their work spaces by floor vents. Louvres made from recycled timber will shade the west facade. Energy from photovoltaic roof panels will power the louvres, which will move according to the position of the sun. Together these features combine to create a controlled and healthy climate.
About 100,000 litres of black (toilet) water a day will be extracted from the sewer in Little Collins Street. A city sewer usually holds 95 per cent water, a burden on the system and a waste of water. The sewage, along with any generated on site, will be put through a multi-water treatment plant that will filter out the water and send solids back to the sewer. The extracted water will be treated through a micro-filtration system to create A-grade clean water suitable for all non-drinking uses.
Some of the recovered water will supply CH2’s water cooling, plant watering and toilet flushing needs. The rest will be used in other council buildings, city fountains and plants. More water will be saved through recycling water from the fire-safety sprinkler system and from rainwater.
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