The efficiency index minimum, of the latter, is currently MEI ≥ 0.1.
The reference value for the water pumps more efficient, MEI is ≥ 0.7.
Since January 2015, the index of efficiency of the pumps must be suitable MEI index ≥ 0.4. The pumps MATRA were divided by category and associated with a chart type (A, B, C … L) following which defines the minimum index of efficiency MEI imposed on the design by 2015.
Efficency charts relative to each products series can be downloaded here.