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 |
|---|---|---|---|---|---|
| Credit 15 and 16 Warehouse modelling | DABv1 | April 2022 | 15 - Greenhouse Gas Emissions | Greenhouse Gas Emissions | Link |
|
Approved Ruling: We are issuing this clarification as we note that there is an error in the wording of the GHG Emissions Calculation Guide, where under table 26 HVAC and simulation parameters the guidance states that: “The reference project must operate within the temperature range 18 to 26°C for at least 98% of plant operating hours. Where the design temperature range is within this range, the Reference project shall use the same control band as the Proposed project where the design temperature range is outside of this range, the Reference project shall use lower and supper temperature control limits of 18 and 26°C respectively, as appropriate” We note that the guidance is not specifically clear for mechanically ventilated warehouse spaces and increases the Reference building energy consumption unfairly. To clarify the Reference Project must achieve the same space temperature conditions as the proposed project for greater than 98% of occupied hours. Alternatively, the analysis can be undertaken on the basis of both the Proposed and Reference Project achieving a PMV of between -1 and 1 for 98% of occupied hours across 95% of the floor area. (The intent of this requirement is that the Reference Project generally achieves the same level of service as the Proposed Project) |
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