The Greenhouse and Energy Minimum Standards (Household Refrigerating Appliances) Determination 2019 (the 2019 Determination) will come into force on 15 August 2021. Before then, suppliers may choose to register refrigerators and freezers to either:
- the Greenhouse and Energy Minimum Standards (Household Refrigerating Appliances) Determination 2012, which references the AS/NZS 4474.1:2007 test standard and the AS/NZS 4474.2:2009 performance and labelling standard (as amended); or
- the 2019 Determination that references the new AS/NZS IEC 62552 series of standards (parts 1, 2 and 3) and the AS/NZS 4474:2018 standard (as amended), which includes performance and labelling requirements.
For suppliers who apply for registration under the 2019 Determination, appliances need to be tested in accordance with the AS/NZS IEC 62552.3:2018 standard that is an identical adoption of IEC 62552-3:2015. Further, the calculation of an appliance’s daily energy consumption must be undertaken in accordance with the requirements specified in the AS/NZS 4474:2018 standard.
For the calculation of an appliance’s daily energy consumption for energy labelling purposes, Australia and New Zealand use a unique methodology to determine daily energy consumption at both 16⁰C and 32⁰C ambient temperatures. While the measurement of the components that make up daily energy consumption are as prescribed in AS/NZS IEC 62552.3:2018, the weighting of the components for the calculation of daily energy consumption for energy labelling needs to be performed as specified in Section 2.2.2 of AS/NZS 4474:2018.
Consequently, for refrigerators or freezers that have an automatic defrost control cycle, a defrost weighting, which is specified in Table 2.2 of AS/NZS 4474:2018 (Section 2.2.2, pg. 12), must be included in the daily energy consumption figures for energy labelling purposes. This requirement means that for affected appliances, representative incremental energy for defrost and recovery (ΔEdf) must be adjusted as follows:
- appliances with run-time defrost controllers - measured value is multiplied by 1.3 to give ΔEdf-a
- appliances with all other defrost controller types - measured value multiplied by 1.9 to give ΔEdf-a
Section 2.2 of AS/NZS 4474:2018 contains full details of the requirements relating to the calculation of daily energy consumption for energy labelling. The Energy Rating Registration System also references the relevant sections of AS/NZS 4474:2018.
Note that there is no adjustment to the representative incremental energy for defrost and recovery (ΔEdf) when calculating energy consumption for assessment against MEPS.