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Notes on Selection of Suitable Showers

The water efficiency grading of the WELS showers is:

Nominal Flow Rate :
ƒ (l/min)
Water Efficiency Grade
ƒ ≦ 9.0 Grade 1
9.0 < ƒ ≦ 12.0 Grade 2 
12.0 < ƒ ≦ 16.0 Grade 3
ƒ > 16.0 Grade 4

If the measured flow rate of your shower is below 9 litres per minute, the performance of your shower is already comparable to that of a Grade 1 WELS shower.