Division Average specific energy consumption (ASE)
United Kingdom
The average specific energy consumption during carpet test (ASEc ) and during hard floor test (ASEhf ) shall be determined as an average of the specific energy consumption (SE) of the number of cleaning cycles that constitute the carpet and hard floor test, respectively. The general equation for the specific energy consumption SE in Wh/m2 test area, at an accuracy of 3 decimal places, applicable for carpet, hard floor and general purpose vacuum cleaners with the appropriate suffixes, is:
where:
-
P is the average power in W, at an accuracy of 2 decimal places, during the time in a cleaning cycle that the centre of the cleaning head is moving over the test area
-
NP is the average power equivalent in W, at an accuracy of 2 decimal places, of battery operated active nozzles, if any, of the vacuum cleaner, calculated as provided below
-
t is the total time in hours, at an accuracy of 4 decimal places, in a cleaning cycle during which the centre of the cleaning head, i.e. a point halfway between the side, front and back edges of the cleaning head, is moving over the test area
-
A is the surface area in m2, at an accuracy of 3 decimal places, passed over by the cleaning head in a cleaning cycle, calculated as 10 times the product of the head width and the appropriate length of test area. If a household vacuum cleaner has a head width of over 0,320 m, then the figure of 0,320 m shall be substituted for head width in this calculation.
For the hard floor tests the suffix hf and parameter names SEhf, Phf, NPhf, thf and Ahf shall be used in the above equation. For the carpet tests the suffix c and parameter names SEc, Pc, NPc, tc and Ac shall be used in the above equation. For each of the cleaning cycles, values of SEhf, Phf, NPhf, thf , Ahf and/or SEc, Pc, NPc, tc , Ac , as applicable, shall be included in the technical documentation.