One One One Eagle Street evolved from site-specific factors and a drive for exceptional design which conventional solutions simply would not achieve. The resulting solutions pushed beyond the ‘standard’ envelope and ultimately achieved a 6 Star Green Star Design rating and 5 Star NABERS energy rating.
The projects iconic structure was born from complicated site constraints, most notably the lack of bearing points available due to the adjoining towers loading docks and basement carparks. An algorithm called ‘growing towards the light’ was used to develop the structural trunks and branches which load onto the specific bearing points and, much like a tree, diminish with height. This was most efficient and utilised 20% less material than a conventional structure.
To meet the ambitious performance requirements of this project, the air control system called for Dual-Duct VAV units. These enable high levels of treated outside air to benefit the air-conditioning process in terms of free cooling in winter, high ventilation rates and greater return-air purity. Dual-Duct VAV’s require more thought and input during the design phase, and thus are often overlooked in today’s short term, dollar driven market in favour of Fan-assisted VAV systems. Fan-assisted VAV’s may be easier to implement in the short term, but do not offer many of the benefits outlined above and by comparison can be potentially noisy in operation, awkward to service and expensive to run. A correctly designed Dual Duct system, accompanied by highly functional air management equipment, will always produce a good return on investment.
To add to the challenge, the VAV units unique to this project also required explicit valve action characteristics with differing inlet duct connections to satisfy very specific airflow requirements, in search of best possible performance. There were over 1000 of these installed throughout the 54 floors of this iconic building to provide individualised temperature and ventilation to private offices, function rooms and public spaces.
Manage air supply and the spread of smoke through air-conditioning and ventilation systems.
Impede the spread of fire and combustible airborne materials through air-conditioning and ventilation systems.
Precise localised temperature control by varying the rate of airflow.
To meet the ambitious performance requirements of this project, the air control system called for Dual-Duct VAV units. These enable high levels of treated outside air to benefit the air-conditioning process in terms of free cooling in winter, high ventilation rates and greater return-air purity.