Green Star FAQs

Yes.

When targeting the 'Comparison to Industry Standards' pathway from the Provision of Outdoor Air criteria under the Clean Air and Indoor Air Quality credits, an improvement on outdoor air compared to AS1668.2:2012 must be demonstrated across at least 95% of the regularly occupied areas ('nominated area' under Green Star - Design & As Built and Green Star - Interiors) during 100% of operating hours. 

Alternatively, projects may demonstrate that the improvement on outdoor air compared to AS1668.2:2012 is demonstrated across 100% of the regularly occupied areas during 95% of operating hours. That is, the system must be sized and building controls programmed to meet:

• AS1668.2:2012 quantities of outdoor air for 100% of operating hours.
• The required 50% or 100% improvement to AS1668.2:2012 quantities of outdoor air for 95% of operating hours. 

The expected climatic conditions across the lifetime of the system must also be considered to ensure systems are sized appropriately. Projects using this alternative approach are encouraged to consider the continued suitability of the selected system under the Climate Change Resilience and Adaptation and Resilience credits where applicable. 

Submission Content

• Documentation as per the Submission Guidelines.
• Supporting evidence of the method of control, including how the system will provide outdoor air for 95% of hours as described by the mechanical engineer. This shall include:
  • If the control is via outdoor air conditions (dry bulb and wet bulb temperatures) then the submission should include a chart or table, derived from the weather file used for the energy use credit, clearly showing that the proposed control points to turn down outdoor air rates on extreme days (heating and cooling) do not exceed 5% of the annual operating hours.
  • Commentary on the impact of climate change on the number of hours per year that the outdoor air rates will be turned down, using the proposed control points, in the final year of the design life of the system (e.g. 15-30 years after installation, depending on the system and equipment).
  • If the turning down of outdoor air below the Green Star minimum 50% or 100% increase on AS1668.2:2012 is not controlled by outdoor air dry and wet bulb temperatures, then documentation should be provided to show how it will be controlled and how the minimum of 95% of operating hours per year will be maintained over the design life of the system.

Submit a question by selecting an option below: