Green Star FAQs


FAQ F-00159
If a residential project's HVAC system doesn't have a star rating, can it comply with the NatHERS pathway?

Yes. Projects targeting the NatHERS pathway in the Greenhouse Gas Emissions credit from Green Star - Design & As Built that have air conditioning equipment which isn't covered by the star rating system (AS3823.2-2011 or AS 3823.2-2013, whichever is applicable) or are targeting the Residential pathway in the Energy Use credit from Green Star Buildings v1 and have a cooling system not listed under the Building Services Requirements may comply with the 'Ventilation and Air Conditioning' credit element for spaces with mechanical cooling by demonstrating that:

  • The required minimum energy efficiency ratio for packaged air conditioning equipment and refrigerant chillers is at least 15% higher than what is specified in:
    • NCC Tables J5.4d and J5.4e; or
    • MEPS, where Section J does not apply to the equipment
      capacity.

The above requirements are as per the Prescriptive Pathway in the Greenhouse Gas Emissions credit from Green Star - Design & As Built. 

 

All HVAC equipment that is covered by the star rating system (AS 3823.2-2011 or AS 3823.2-2013) or are listed under the Building Services Requirements if targeting Green Star Buildings v1 must meet the compliance requirements set out in targeted rating tool. 





Rating Tools

This FAQ is related to the following Rating Tools, Categories or Credits:

  • Green Star - Design & As Built v1 / Energy / 15.1 Greenhouse Gas Emissions
  • Green Star - Design & As Built v1.1 / Energy / 15.1 Greenhouse Gas Emissions
  • Green Star - Design & As Built v1.2 / Energy / 15.1 Greenhouse Gas Emissions
  • Green Star - Design & As Built v1.3 / Energy / 15 Greenhouse gas emissions
  • Green Star - Design & As Built v1.3 / Energy / 15.B NatHERS Rating Pathway
  • Green Star Buildings v1.0 / Positive / 22 Energy Use


Disclaimer

These FAQs are:

  • provided as additional technical assistance for Green Star users.
  • optional and free to use on Green Star projects.

When used on Green Star projects, make sure to:
  • state the FAQ number on the Submission Template.
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  • include the PDF in the submission.

The GBCA reserves the right to add or remove FAQ at our discretion.




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