Skip to content

 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

How to most efficiently use this page:

  1. Filter for the relevant tool version
  2. If known, use the credit name field to search for credit keywords or corresponding credit number - please note, this field will ONLY search the "Credit Name" field
  3. Use your CTRL+F to search keywords on the page
Technical Question Title Clarification Type Tool Version Month Released Credit Name Sub-credit Name Amendment/Approved Ruling
Exclusion of Vision Glazing Project Specific DABv1, DABv1.1 November 2020 12 - Visual Comfort Glare reduction

Vision glazing that has been installed to provide sight-lines for clinical staff to observe patients may be excluded from the credit minimum requirements. This is due to the clinical health and safety needs, as well as the model of care being provided to patients.

Alternative Metrics for Flicker-Free Lighting General DABv1 April 2021 11 - Lighting Comfort Minimum Lighting Comfort

Can project teams use alternative metrics to demonstrate compliance with flicker free LED lighting?

Yes. Project teams may use the following metrics for both analogue and digital forms of dimmable and non-dimmable LED lighting to demonstrate that LED fittings within the project are flicker-free. 

Acceptable flicker metrics:

  • Short Term Light Modulation (PstLM) <= 1.0
  • Stroboscopic Visibility Measure (SVM) <= 0.4

These metrics have been deemed appropriate at this time for residential and commercial office projects, with the understanding that ongoing research into acceptability levels may result in a more stringent limit being recommended in the future.

Documentation Requirements:

Please provide the following in your submission:

  • Evidence demonstrating the above metrics have been achieved
  • In speculative or cold shell projects: A Tenancy Fitout Guide outlining all procured LED lights need to meet the above flicker metrics.
  • In speculative or cold shell projects: Co-signed agreement between the building owner and tenant committing to the conditions of the Tenant Fitout Guide.
  • All other documentation requirements as per the submission guidelines.
  • A copy of this response.
ASAE 3100 Compliance Engagements for Auditing Requirements General DABv1 November 2020 20 - Responsible Building Materials Permanent Formwork, Pipes, Flooring, Blinds and Cables

For the auditing requirements of the Best Practice Guidelines for PVC, an appropriate method of compliance can be a simple statement that a limited assurance review according to ASAE 3100 Compliance Engagements has been completed.

Meters for non-base Building Uses General DABv1 November 2020 6 - Metering and Monitoring Metering

Do I need to provide meters to uses not related to base building systems?

All distinct uses, common uses and major uses that service the building must be metered. These uses must also be connected to a monitoring system.

As an example: at a minimum, the base building should provide floor by floor meters for the following tenant energy uses;

  • General Power
  • HVAC Systems
  • Lighting Systems

 

ASHRE 62 General DABv1, DABv1.1 September 2024 9 - Indoor Air Quality Ventilation System Attributes

The DAB Submission Guidelines references ASHRE 62 however this standard does not contain any duct cleaning requirements and is an error. Projects should use the TR19 Standard which is acceptable for demonstrating compliance with the ductwork cleaning requirement in section 9.1.3: Cleaning Prior to Use and Occupation

Pot Diameter General DABv1, DABv1.1 October 2022 13 - Indoor Pollutants Indoor Plants, INN Challenge

Can project teams use ‘Pot Diameter’ to demonstrate compliance with the credit criteria 12.3.1 – Plant Distribution?

Yes, as alternative to soil surface area method, the pot diameter method can be used as a method of demonstrating compliance with the credit criteria 'Indoor plants - Plant distribution'. 

As a minimum, for every 10 m2 of the nominated area the diameter of the pots must be equal to at least 300mm in diameter.

A combination of different pot sizes is acceptable, provided the diameter of all the pots combined is greater than or equal to 300mm for every 10m2 of the nominated area. 

Please include a copy of this response in your submission. 

Responsible Resource Management General DABv1, DABv1.1 October 2024 8 - Operational Waste Prescriptive Pathway: Facilities

A new ‘Responsible Resource Management – Operational Waste Calculator’ and ‘NZ Best Practice Guidelines for Operational Waste’ document have been created to demonstrate compliance with Green Star Buildings Credit 4 – Responsible Resource Management. These resources can be used as an alternate compliance pathway for Design & As Built Credit 8 – Operational Waste. 

Credit to Address All Major Steel Uses General DABv1 June 2021 19 - Life Cycle Assessment/Impacts Life Cycle Impacts – Steel

Although the credit refers to steel framing, this credit has been perceived to address all the major steel uses associated with structural elements of the building. Therefore, the table still shows required steel strengths for non-structural and non-framing items like steel roofing and steel wall cladding/sheeting. Accordingly, steel roofing and steel wall cladding/sheeting should be assessed under this credit.

Make Good clause intent for End of Life General DABv1, DABv1.1 October 2022 5 - Commitment to Performance End-of-life Waste Performance

Does not having a Make Good clause meet the intent of the End of Life Waste credit?

Yes. Not having a Make Good clause is considered to have an equivalent environmental outcome to having a best practice Make Good clause, where the project team can demonstrate there is a commitment from the building owner to pursue the re-use of the existing fitout by an incoming tenant.

A joint commitment, wherein no Make Good works are required between Building Owner and Tenant, must still address the requirements of credit 5.2A.

Where the lease agreements do not have best practice ‘make good’ clauses in place, a separate legal agreement or memorandum of understanding that addresses these requirements may be used.

Pre-approved Credits not required General DABv1 October 2019 29 - Innovation Global Sustainability

Project teams are not required to have been awarded the pre-approved credits from other rating tools listed under the Global Sustainability credits in Green Star - Design & As Built when making claims under the Global Sustainability credit. These pre-approved credits may also be applied to other tools of Green Star - Interiors where appropriate. The project team is required to outline and supply evidence to validate the claim in lieu of official WGBC member rating tool accreditation. Project teams using all Green Star tools may also target other items not listed as pre-approved, provided they are considered outside of the scope of the Green Star rating tools. In this case, a free-of-charge technical question should be submitted to the NZGBC for approval. For innovation claims within a Green Star crosswalk, the relevant attribute from the crosswalk does need to be achieved to target the point, as these topics have been deemed within the scope of Green Star.