none of the underlying GfK data can be identified, which is also necessary due to intellectual property requirements. For all products, when only national sales data was available, a proportion of the national total for any product was assigned to each state depending on dwelling numbers as a proportion of the national dwelling numbers. The sales and resulting stock numbers and ownership rates produced by the model were cross checked against ownership statistics obtained from the ABS 4602 Environmental Issues: Energy Use survey series (ABS 4602 Surveys). This set of surveys has been conducted every three years since 1999 (and earlier for some product categories). If the model indicated ownership levels that significantly differed from the ABS survey results, the reasons for such differences were investigated and sales data or share of sales by state refined if required to reflect the most accurate data available. Usage Usage is irrelevant for refrigerators and freezers as they operate continuously. Dishwasher and clothes washer usage comes from ABS 4602 Surveys (2005, 2008, 2011). Their usage was calculated from the survey data which reported the proportions of owners using the appliances less than 3 per week, 4-6 per week, daily etc. This survey data was converted to estimates of the mean average number of times the appliance was used annually. Dishwasher usage was estimated at 200 cycles p.a. and clothes washer usage estimated at 229 cycles p.a. Clothes dryer usage in Victoria and NSW ABS surveys appears to be around 20 cycles p.a. In the warmer states, 18 uses p.a. is used reflecting that not all cycles will be full cycles and the warmer climate may reduce the need for dryers. Size and Efficiency Sales data for individual product models were matched with each model’s data in Australian Energy Rating registration data, to produce sales data matched with size and efficiency data. The resulting data was used to determine sales weighted energy consumption averages, product size and product efficiency across each white good product. For fridges and freezers, annual energy use from Comparative Energy Consumption (CEC) was divided by its size, expressed as adjusted volume (a standardised measure gives greater weight to freezer volume), in order to get average efficiency for each model. Combined with sales data and adjusted volume data, a sales volume weighted efficiency measure was produced indicating average energy use per year.
none of the underlying GfK data can be identified, which is also necessary due to intellectual property requirements. For all products, when only national sales data was available, a proportion of the national total for any product was assigned to each state depending on dwelling numbers as a proportion of the national dwelling numbers. The sales and resulting stock numbers and ownership rates produced by the model were cross checked against ownership statistics obtained from the ABS 4602 Environmental Issues: Energy Use survey series (ABS 4602 Surveys). This set of surveys has been conducted every three years since 1999 (and earlier for some product categories). If the model indicated ownership levels that significantly differed from the ABS survey results, the reasons for such differences were investigated and sales data or share of sales by state refined if required to reflect the most accurate data available. Usage Usage is irrelevant for refrigerators and freezers as they operate continuously. Dishwasher and clothes washer usage comes from ABS 4602 Surveys (2005, 2008, 2011). Their usage was calculated from the survey data which reported the proportions of owners using the appliances less than 3 per week, 4-6 per week, daily etc. This survey data was converted to estimates of the mean average number of times the appliance was used annually. Dishwasher usage was estimated at 200 cycles p.a. and clothes washer usage estimated at 229 cycles p.a. Clothes dryer usage in Victoria and NSW ABS surveys appears to be around 20 cycles p.a. In the warmer states, 18 uses p.a. is used reflecting that not all cycles will be full cycles and the warmer climate may reduce the need for dryers. Size and Efficiency Sales data for individual product models were matched with each model’s data in Australian Energy Rating registration data, to produce sales data matched with size and efficiency data. The resulting data was used to determine sales weighted energy consumption averages, product size and product efficiency across each white good product. For fridges and freezers, annual energy use from Comparative Energy Consumption (CEC) was divided by its size, expressed as adjusted volume (a standardised measure gives greater weight to freezer volume), in order to get average efficiency for each model. Combined with sales data and adjusted volume data, a sales volume weighted efficiency measure was produced indicating average energy use per year.
RBS2014_Technical_Appendix_0.docx