Document ID: chunk:federal_register_of_legislation:F2022L00025:clause:2_22
Version: federal_register_of_legislation:F2022L00025
Segment Type: clause
Provision Reference: sch 2 cl 22
Character Range: 18891–20238

22  Calculating the star rating
 (1) The star rating index (SRI) for a product is given by the following formula:

       where:
  ln is the natural logarithm.
  WEFaverage is the sum of the WEF values for each unit tested, divided by the number of units tested.
              BaselineWEF =
nameplate input power is the electrical input power as shown on the pump unit rating label, in watts. If the electrical input power is not shown on the pump unit rating label - the nameplate input current multiplied by 230V.
WEF is the weighted energy factor.
 (2) The star rating for a product is derived from the SRI according to the following table:

Derivation of star rating
                           SRI   1.5  1
1.5                       SRI   2    1 ½
2                         SRI   2.5  2
2.5                       SRI   3    2 ½
3                         SRI   3.5  3
3.5                       SRI   4    3 ½
4                         SRI   4.5  4
4.5                       SRI   5    4 ½
5                         SRI   5.5  5
5.5                       SRI   6    5 ½
6                         SRI   7    6
7                         SRI   8    7
8                         SRI   9    8
9                         SRI   10   9
10                        SRI         10

Division 3—Other GEMS labelling requirements