Green Star Technical Clarification Rulings
Technical Clarifications for Green Star represent our answers to Technical Questions submitted by projects, and provide further guidance and reference to others. The list is regularly updated.
There are two types of Technical Clarifications listed in the table below:
General Clarifications
These are extensions to the guidance provided in the Submission Guidelines. They clarify and sometimes supersede the original Credit Criteria or
Compliance Requirements. General Clarifications set precedent for future project teams to follow. Should a project team wish to apply a general clarification to its project, there is no requirement for further Technical Questions to be submitted. NZGBC Assessors will also use them as precedents to assess submissions.
Project Specific Clarifications
These are published as references for other projects but, unlike General Clarifications, they do not set precedent. They often relate to special
situations where multiple prerequisites exist for a particular project and are less likely to reoccur to another project. Therefore, rulings set for Project Specific Clarifications are often conditional and will likely vary for other projects. Each project still needs to submit its own Technical Questions and provides evidence relating to its own building in order to have a similar ruling approved for that specific building.
Should you wish to apply any Technical Clarification for legacy rating tools to your projects, please submit a Technical Question to the NZGBC to
explain why and how it applies. You can download the Technical Question form here
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Technical Question Title | Clarification Type | Tool Version | Month Released | Credit Name | Sub-credit Name | Amendment/Approved Ruling | |
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In lieu of a 'make good' lease clause | General | DABv1 | November 2020 | 5 - Commitment to Performance | End-of-life Waste Performance |
In lieu of a 'make good' lease clause between the building owner and the tenant(s), the project team may provide another suitable formal commitment that indicates the building owner will undertake those commitments and responsibilities. The formal commitment must be a separate legal agreement and/or a memorandum of understanding (MoU), and address all the credit compliance requirements. |
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Provision of Outdoor Air | General | DABv1 | January 2021 | 9 - Indoor Air Quality | Provision of Outdoor Air |
Despite the difference between NZS4303:1990 and AS1668.4:2012 and the intentional preclusion of AS 1668.2 in New Zealand Building Code with regards to provision of outdoor air, Green Star still recognises both standards as valid references for calculating achievement of criteria 9.2 Provision of Outdoor Air. This is because Green Star rewards points for a rate 50% and 100% greater than the minimum required by these standards rather than policing on code compliance. Recognising both standards does not conflict with building code conformance however brings more flexibility to project teams. The responsibility for minimum code compliance rests with the designer and is governed by existing regulatory bodies, while the intent of the tool is to improve outdoor air rates over minimum requirements. In view of the above, we are clarifying that when the section for 9.2A Comparison to Industry Standards only refers to the AS 1668.2:2012, it should read “the recognised standards listed in 9.2.3”.
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DALI System | General | DABv1 | November 2020 | 11 - Lighting Comfort | Localised Lighting Control |
A project team may target the credit criteria Localised Lighting Control for a base building targeting a Green Star - Design & As Built rating, by installing a DALI system within the base building, which can then be utilized by the tenant to deliver localized lighting control. Project teams must provide a Tenancy Fitout Guide (or similar) to the tenant, which contains relevant information about the DALI system. |
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Offsetting Embodied Emissions | General | DABv1 | August 2021 | 29 - Innovation | Global Sustainability |
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Default Service Life | General | DABv1, DABv1.1 | May 2024 | 19 - Life Cycle Assessment/Impacts | Comparative Life Cycle Assessment |
The default service life in all LCA calculations is to be 50 years (not 60) to align with NZBC and the DAB v1.1.1 Submission Guideline. |
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Amended Definition for Reference Projects | General | DABv1 | December 2020 | 15 - Greenhouse Gas Emissions | Greenhouse Gas Emissions |
The definition for Reference Projects is amended as below: |
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AEM Producer Statement | General | DABv1 | June 2022 | 14 - Thermal Comfort, 15 - Greenhouse Gas Emissions, 16 - Peak Electricity Demand Reduction | Thermal Comfort, Greenhouse Gas Emissions, Peak Electricity Demand Reduction |
Accredited Energy Modellers can use a producer statement instead of a full energy modelling report to demonstrate compliance for credit 14 Thermal Comfort,15 Greenhouse Gas Emissions and 16 Peak Electricity Demand Reduction. Note that the associated submission templates and Greenhouse Gas Emissions Calculator will still need to be submitted. |
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Sustainable Products Calculator to be used consistently regarding Labour | General | DABv1 | October 2019 | 21 - Sustainable Products | Sustainable Products |
Costs entered into the Sustainable Products Calculator can either include or exclude labour and transport. However, this must be consistent for all costs entered. As such, all individual product costs, and the project’s PCV, will either include or exclude labour and transport costs.Where project teams are provided with some costs that include labour and transport, and some that exclude it, it is acceptable to choose one approach (i.e. include or exclude these costs) and then adjust the non-conforming figures accordingly.As an example, the product costs available to a project team for loose furniture and floor coverings excludes labour and transport, but all other product costs include it. In this case, the project team could make educated estimates for the labour and transport costs associated with the installation of loose furniture and floor coverings and add these costs to the original values provided. If this kind of adjustment is performed, please describe the methodology and justification for these calculations in the credit’s Submission Template. |
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Curtain instead of Blinds | General | DABv1, DABv1.1 | March 2024 | 12 - Visual Comfort | Glare reduction |
If a curtain meets all the same requirements as what is required for blinds/screens in 12.1B, it would be deemed to comply |
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Office Space Lighting | General | DABv1 | November 2020 | 11 - Lighting Comfort | Localised Lighting Control |
The requirements of 11.4 may be achieved in the office spaces by providing a mixture of general non-dimmable ceiling lighting and local dimmable task lighting provided the task lighting is installed either as part of the base build or as part of an integrated fit-out. The local dimmable lighting must also be able to be turned on or off as per the requirements of the 11.4 in the Submission Guidelines. Where 11.2 is also being targeted then the requirements of 11.2 must be achieved alongside the recommendations for general and local lighting set out in AS1680.2.2-2008 Appendix E with the general lighting on and the local task lighting at its maximum illuminance. Note this applies to office spaces only |