Star Ratings

The following water star ratings and label design are largely the same as those presented in AS/NZS 6400:2005, with the exception of low pressure supply systems (more fully discussed on page 17). They have been adapted to suit the New Zealand practical and regulatory environment. Reproduced from AS/NZS 6400: 2005 with the permission of Standards New Zealand under Licence 00664.

It is envisaged that the regulations will cite a number of Australian/New Zealand Standards:

The following star rating applies to showers as defined in AS/NZS 3662 and the water consumption of a shower intended for use in a high pressure system is taken to be the nominal flow rate determined in accordance with this standard.
The table relates to dishwashers as specified in AS/NZS 2007.2 and clothes washing machines are those specified in AS/NZS 2040.2.
Lavatory equipment is that listed in AS 1172.1, AS 1172.2, ATS 5200.020, ATS 5200.021 and ATS 5200.030.
Urinal equipment is that specified in AS 3982 or ATS 5200.004 and the water consumption of urinal equipment is the volume of discharge as determined in accordance with AS/NZS 3982.
Tap equipment is considered to be that specified in AS/NZS 3718, however, it does not apply to any tap or tap outlet that is solely for use over a bath, or part of an appliance such as a chilled or boiling water dispenser. The water consumption of tap equipment intended for use in a high pressure system is taken to be the nominal flow rate determined in accordance with AS/NZS 3718.

Item	Product type	Water consumption unit	Rating
Item	Product type	Water consumption unit	0 Stars (warning)	1 Star	2 Stars	3 Stars	4 Stars	5 Stars	6 Stars
1	Showers intended for use in high pressure systems	L/min The nominal flow rate determined in accordance with AS/NZS 3662	More than 16.0	More than 12.0 but not more than 16.0	More than 9.0 but not more than 12.0	More than 7.5 but not more than 9.0	Not currently available	Not currently available	Not currently available
	Showers intended for use in low pressure systems	L/min	To be confirmed
2	Dishwashers	L/place setting	*Where*: Star Rating Index = fractional star rating used to determine the number of stars to appear on the label, rounded down to the nearest half star WC = water consumption of the model in litres, determined under the same conditions used for the energy consumption tests as specified in AS/NZS 2007.2. BWC = base water consumption = 2.5 + P x 1.6 (P = number of place settings of the dishwasher) WRF = water reduction factor per additional star (17.5%) = 0.175 If a dishwasher achieves less than 1 on the star rating index, the rating of the dishwasher is zero stars.
3	Clothes washing machines	L/load capacity	*Where*: Star Rating Index = fractional star rating used to determine the number of stars to appear on the label, rounded down to the nearest half star WC = water consumption of the model in litres. The water consumption of a clothes washing machine shall be taken to be the higher of – a) the claimed total water consumption of the warn-wash or b) the claimed total water consumption of the cold-wash, when each is determined under the conditions used for the energy consumption tests as specified in AS/NZS 2040.2 BWC = base water consumption = 30 x C (C = rated load capacity of the clothes washer (kg) as determined under AS 2040.1 ) WRF = water reduction factor per additional star (30%) = 0.30 If a clothes washing machine achieves less than 1 on the star rating index, the rating of the clothes washing machine is zero stars.
4	Urinal equipment	L/single stall or L/600 mm width of continuous wall The volume of discharge as determined in accordance with AS/NZS 3982	More than 2.5 serving a single stall or 4.0 for two stalls or equivalent width of continuous wall, or having an adjustable activation device with a sensitivity field greater than 300 mm from the front of the urinal, or having a flushing control mechanism that flushes more than two stalls or equivalent width of continuous wall	Not more than 4.0 serving two stalls or equivalent width of continuous wall, and conscious, demand driven or smart-demand operation	Not more than 2.5 serving a single stall or equivalent width of continuous wall, and conscious, demand driven or smart-demand operation	Not more than 2.0 serving a single stall or equivalent width of continuous wall, and conscious, demand driven or smart-demand operation	Not more than 1.5 serving a single stall or equivalent width of continuous wall, and smart-demand operation	Not more than 1.0 serving a single stall or equivalent width of continuous wall, and smart-demand operation	Not more than 1.0 serving a single stall or equivalent width of continuous wall, and smart-demand operation with a urine sensing device
5	Tap equipment, intended for use in high pressure systems	L/min Taps – Nominal flow rate determined in accordance with AS/NZS 3718	More than 16.0	More than 12.0 but not more than 16.0	More than 9.0 but not more than 12.0	More than 7.5 but not more than 9.0	More than 6.0 but not more than 7.5	More than 4.5 but not more than 6.0	less than 4.5
5	Tap equipment, intended for use in low pressure systems	L/min	To be confirmed
6	Lavatory equipment	L (average flush volume)	More than 5.5	More than 4.5 but not more than 5.5	More than 4.0 but not more than 4.5	More than 3.5 but not more than 4.0	More than 3.0 but not more than 3.5	More than 2.5 but not more than 3.0	Not more than 2.5
		The water consumption of lavatory equipment is taken to be – a) for single-flush cisterns – the discharge flush volume, determined in accordance with AS 1172.2 b) for dual-flush cisterns – the average flush of one full-flush discharge and four reduced-flush discharge volumes, with the full-flush discharge flush volume and reduced-flush discharge volumes determined in accordance with AS 1172.2

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Proposed Implementation of Mandatory Water Efficiency Labelling

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