21 March 2012 – A $290 million mixed development at 420 George Street, Sydney, owned by Fortius Funds Management and the Lend Lease managed Australian Prime Property Fund, has achieved a five star As Built Green Office rating – one of only six to receive this rating in NSW.

It is also designed to achieve a 4.5 Star NABERS energy rating.

The building, completed in late 2010, was repositioned in a project built by Lend Lease Project Management and Construction, with Aurecon contracted as part of the Lend Lease project management and construction team to provide cost efficient energy solutions.

The building’s green credentials are supported by innovative mechanical, electrical and vertical transportation systems designed by engineering and specialist technical consultancy, Aurecon, which have helped make it one of only six buildings to achieve the rating so far in NSW.

Fortius Funds Management’s projects director, Sam Sproats said the project’s success was a testament to the project team’s “dedication to providing environmental excellence in a site filled with a significant number of practical constraints.”

There were several complications, Mr Sproats said.

“The project was particularly challenging to certify against the Green Star tool given the demarcation of Mid City retail centre, the Virgin Active Health Club, the staged occupancy of incoming commercial tenants, and an integrated central plant arrangement. Each design challenge was collaboratively resolved to ensure the building is resource-efficient throughout its life-cycle.”

Aurecon project director Marek Tomaszewski said significant energy and cost efficiencies were achieved through:

• High efficiency decoupled central chilled water plant serving both retail and commercial mechanical systems.
• High temperature chilled water system serving the chilled beams
• A hybrid mechanical system consisting of active chilled beams and variable air volume.
• Increased indoor environmental air quality and air distribution
• High efficiency lifts
• •Extensive electrical and mechanical metering systems
“The combination of active chilled beams and low air temperature VAV provided a highly energy efficient mechanical plant while reducing the client’s capital expenditure,” Mr Tomaszewski said.

The mixed development is located in the heart of Sydney’s CBD between Pitt Street Mall and George Street. The development consists of four retail levels, 28 levels of office and two basement levels of parking. The commercial tower provides approximately 37,000 square metres of A+ grade office accommodation while the retail podium provides for 9000 sq m of multi-level retail.

Jones Lang LaSalle’s Sydney headquarters is also located in the building in its new WorkSmart environment.
• See https://thefifthestate.com.au/archives/32694