23 Furzer Street, the first 6 star NABERS Energy rating for a major office building.

Real estate group Mirvac has lifted its NABERS Energy rating to 5 stars across its entire office portfolio, from just 2.5 stars in 2008.

“Mirvac had a 2.5 Star NABERS Energy portfolio average rating in FY08, so this is an enormous transformation and reflects the hard work our team has put in to embedding sustainability into our business,” Mirvac group executive, office and industrial operations Ben Hindmarsh said.

Tom Grosskopf, director of the Metropolitan Branch at the NSW Office of Environment and Heritage, which administers NABERS, said that only 20 per cent of NABERS-rated buildings had a 5 star rating or above, and that Mirvac had demonstrated leadership in sustainability.

Mirvac also announced an industry first in getting a 6 star NABERS Energy rating without GreenPower for a major office building – the 46,000 square metre 23 Furzer Street building in Phillip, ACT.

Systems that helped achieve the rating include an 80 kilowatt solar PV system, a chillier plant optimisation system and sensor-based LEDs.

“This is a significant milestone for the Group and highlights both the quality of our office portfolio and our commitment to sustainability leadership,” Mr Hindmarsh said. “We have achieved this rating without the use of GreenPower, and this result is a testament to our focus on operational efficiency and the continued education of our people and tenants alike.

“The value of our efforts over the past few years is highly tangible, and both our organisation and our tenants will directly benefit from this, today and in the future.

“We all know saving energy means saving money, which makes this outcome good business sense.”

Mr Grosskopf said he now expected other major building to follow suit and push for 6 star NABERS outcomes.

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