The most water-efficient model on the market now uses about 10 litres (0.78 litres per place setting) but there is still a wide range in water-efficiencies at each capacity level. (Table 16, Figure 17). Although some of the highest water users are registrations, which will all run out by ‘grandfathered’ March 2012, there are still a range of water efficiencies among the more recent registrations (Figure 18). When the WELS star rating bands were devised, a vertical intercept on the Y-axis was included in recognition that smaller capacity units consume more water per place setting than larger units. The dashed trend line on Figure 17 indicates that the relationship may be more pronounced than originally envisaged. This means that minimum WES levels based on WELS star bands may have disproportionate impacts on smaller units. Table 16. Average, minimum and maximum water consumption rates, DWs water consumption rates litres per place setting litres per place setting Standard (11-15 place settings) Other (10 or less place settings) Minimum 0.8 1.2 Model average 1.2 1.7 Maximum 2.4 3.0 Source: Recent registrations on Rating based on program. ‘normal’ Figure 17. WELS ratings of all DW models on the market at January 2008 Author analysis of registered models Figure 18. WELS ratings of more recently registered dishwasher models on the market at January 2008 Author analysis of registered models
The most water-efficient model on the market now uses about 10 litres (0.78 litres per place setting) but there is still a wide range in water-efficiencies at each capacity level. (Table 16, Figure 17). Although some of the highest water users are ‘grandfathered’ registrations, which will all run out by March 2012, there are still a range of water efficiencies among the more recent registrations (Figure 18). When the WELS star rating bands were devised, a vertical intercept on the Y-axis was included in recognition that smaller capacity units consume more water per place setting than larger units. The dashed trend line on Figure 17 indicates that the relationship may be more pronounced than originally envisaged. This means that minimum WES levels based on WELS star bands may have disproportionate impacts on smaller units. Table 16. Average, minimum and maximum water consumption rates, DWs water consumption rates litres per place setting Standard (11-15 place settings) litres per place setting Other (10 or less place settings) Minimum 0.8 1.2 Model average 1.2 1.7 Maximum 2.4 3.0 Source: Recent registrations on Rating based on ‘normal’ program. Figure 17. WELS ratings of all DW models on the market at January 2008 Author analysis of registered models Figure 18. WELS ratings of more recently registered dishwasher models on the market at January 2008 Author analysis of registered models
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