Since Energy Ministers agreed to the Decision Regulation Impact Statement (RIS) – Household Refrigerators and Freezers in November 2017, the Standards Australia Committee EL-060 made several sets of small changes to some factors in the draft AS/NZS 4474:2018 standard. This affected the anticipated outcomes of models’ star ratings calculated using the star rating algorithm that was proposed in the Decision RIS.
This paper examines options for an updated star rating algorithm that is used in the draft AS/NZS 4474:2018 standard. The replacement Greenhouse and Energy Minimum Standards (Household Refrigerating Appliances) Determination (expected to be published in late 2018) will reference AS/NZS 4474:2018. Adopting the recommended Option 8 will ensure that when the replacement Determination is published, new star ratings will be broadly comparable to old star ratings on average.