IAG is a state-of-the-art, architecturally designed, 5 Green Star building with a net lettable area of 8,500sqm. The NZI Centre was the first commercial building in New Zealand to receive 5 Green Star NZ – Office Interiors 2009 PILOT rating. The building also achieved 5 Green Star NZ – Office Design certified rating from the New Zealand Green Building Council.
The building was lit by 1,500 x T8 1,200mm fluorescent tubes, fitted into simple (electronically ballasted) batten luminaire. The lights sat behind a K5 diffuser.
The NZI Centre typically operated for 70 hours per week.
While IAG’s existing lighting scheme was to code, they believed there was still scope to further reduce their energy consumption, in particular the heat load on the building generated by the air-conditioning
IAG’s objectives were to reduce operating costs while improving the sustainability profile of the centre, thereby minimising their carbon footprint.
The project scope was to provide an end-to-end turnkey solution including: definition of requirements, specification and manufacture of products, project management of the installation, commissioning, reporting, and EECA compliance
BLS Lighting Solutions
BLS met with the IAG Facilities Manager Rachel Gaukrodger to gain an understanding of the site's commercial and operational imperatives.
The catalyst for change was IAG’s need to reduce power consumption, eliminate unscheduled maintenance and to further enhance sustainability by reducing the size of their carbon footprint.
BLS completed a review of the site, recording hours of operation, lux levels, and the hanging height, number, location and type of luminaire.
Preliminary analysis of the site audit data indicated that there was a sound economic case to upgrade the lighting. BLS recommended a formal review of the lighting design and costs.
This review established that a simple one-for-one replacement of the existing fluorescent tubes was the best option and would lift end-of-life lux levels by 12%. This would also minimise installation cost as the BLS T8 1200mm LED tube could be retrofitted into the existing batten fittings.
The BLS UT T8 1,200mm 20W LED tube with an internal driver was specified for the IAG site.
In order to accommodate the particular configuration of the existing light fittings, the end caps on LED tubes were designed with a 90-degree rotation.
The specified tube delivers 2,600 directional lumens, is retrofitted into the existing batten luminaire with only a minor wiring modification, can be serviced in-situ and are provided with a 5 year warranty.
BLS verified that IAG qualified for an EECA grant, and managed the application, compliance process and payment of the grant to the client.
Our Specified Solution.
BLS developed a comprehensive installation plan and project managed the installation, commissioning, EECA reporting and production of the project case study.
The BLS 1,200mm UT T8 20W LED tube was provided with a 5-year L70 warranty.
Phased Project Implementation
BLS coordinated with operational staff to develop an end-to-end project plan, which detailed tasks, processes, site-specific requirements, dependencies, and outputted the critical path to completion.
Measurements and Verification
BLS installed meters on lighting circuits to measure power consumption before and after the upgrade, in order to verify savings as required by the EECA.
BLS appointed and briefed an electrician from their contractor pool; scheduled an on-site visit to meet with IAG’s operational staff; defined health and safety requirements and agreed an optimal install window.
BLS met on-site with IAG to review the installed solution and to verify that projected energy savings and lux levels were to brief.
BLS prepared a project case study and report for IAG and the EECA, detailing energy savings.
Being a “smart building” energy consumption in the IAG facility was being extensively monitored. It was clear that the existing fluorescent lights were producing heat, which was putting an extra load on the air-conditioning. The change to LED lights not only raised light levels, but also significantly reduced the heat load on the building, and as a result the energy costs.
BLS also successfully applied for an eco grant from EECA, which they paid to IAG at the conclusion of the project.