Impact of Changes in AS/NZS4474.1-2007 on Energy Consumption

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Summary

This report was prepared by Energy Efficient Strategies for E3 in October 2007.

A revision of AS/NZS4474.1 was published on 15 August 2007. This new standard will be a prerequisite for registrations that use the new energy label which is scheduled for implementation in 2009. A change in the temperature determination period under AS/NZS4474.1-2007 to include the defrost and recovery period was expected to make the internal temperature appear slightly warmer and was therefore likely to result in a small energy increase when compared to results from testing to the 1997 edition of the standard. However, when the standard was published this impact had not been quantified.

Analysis of detailed test data was undertaken on 31 models to determine the internal temperatures under the old and new test methods in order to quantify this impact. It was found that the average energy impact of the test method change was 1% for Group 5T, 0.5% for Group 5B and 0.3% Group 5S.

This page last modified 09 November 2007