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 access the online Technical Question form here
| Technical Question Title | Tool Version | Date Released | Credit Name | Sub-credit Name | TC Link |
|---|---|---|---|---|---|
| Acoustic Absorption Performance | DABv1 | November 2020 | 10 - Acoustic Comfort | Reverberation | Link |
|
Approved Ruling: For the Reverberation Criterion, where 'note 3' applies, how do I apply the phrase '50% of the area in the space'? The performance of the installed acoustic absorption, irrespective of quantity or location installed, must result in a reverberation time equivalent to or lower than the reverberation time predicted for treating at least 50% of the combined floor and ceiling area with a material having a noise reduction coefficient (NRC) of at least 0.5.Alternatively, compliance can be demonstrated by treating 50% of the combined floor and ceiling area with a material having a NRC of at least 0.5.Acoustic absorption should be applied in locations appropriate to the function of the space, and located to maximise the acoustic performance of materials selected. |
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