Aorangi House fine tuning from 5 stars to 5.5-star NABERSNZ rating saves an additional 20% in energy

30 May 2018

Aorangi House was once tired and outdated, but a green-principled refurbishment led to a 5 star NABERSNZ base building rating in 2016 and fine-tuning has now increased this to a top notch 5.5 star rating. The 5.5 stars base building rating means a 20% improvement of energy saving compared with 2016. The owner and building manager Anaro Group is delighted with the 5.5 star rating for such an iconic and mature building. The overall energy performance is over 64 percent better than an average New Zealand office block.

Situated at 85 Molesworth Street in downtown Wellington, 12-storey Aorangi House is a stylish, contemporary office block. Built in 1970 the property had a strong presence for many years but over time its building fabric and internal systems became outmoded. A multi-million dollar overhaul in 2008 earned a 5 Green Star Design rating and positioned Aorangi House as a success story of rejuvenation, smart energy performance and low greenhouse gas emissions.

Engineering consultancy Beca, the anchor tenant at Aorangi House since its refurbishment, spearheaded the sustainable design interventions applied during the building’s overhaul. Beca spokesman and NABERSNZ assessor Ben Masters says the rating is particularly significant because Aorangi House is essentially a recycled building.

NABERSNZ ratings are becoming increasingly relevant to our commercial property marketplace. Energy bills and operational costs are vital issues for tenants and owners and a NABERSNZ rating provides straight answers. There is also growing evidence that an efficient energy performance improves the value of a building. NABERSNZ encourages ongoing monitoring and tuning of existing systems which is essential to achieving low energy usage. The 5.5 stars show that sustainable refurbishment is a viable option to the carbon hungry alternative of demolition and replacement of older buildings. See full case study

There are still 9 free feasibility assessments on offer until end June 2018. The free feasibility assessments help owners and tenants to assess their building’s readiness to get started with NZBERSNZ. Find out more here