Division 3 Annual energy consumption

The annual energy consumption AE is calculated, in kWh/year and rounded to one decimal place, as follows:

• for carpet vacuum cleaners:

  $${\mathrm{AE}}_c=4\times 87\times 50\times \mathrm{0,001}\times {\mathrm{ASE}}_c\times \left(\frac{1-\mathrm{0,20}}{{\mathrm{dpu}}_c-\mathrm{0,20}}\right)$$

• for hard floor vacuum cleaners:

  $${\mathrm{AE}}_{\mathrm{hf}}=4\times 87\times 50\times \mathrm{0,001}\times {\mathrm{ASE}}_{\mathrm{hf}}\times \left(\frac{1-\mathrm{0,20}}{{\mathrm{dpu}}_{\mathrm{hf}}-\mathrm{0,20}}\right)$$

• for general-purpose vacuum cleaners:

  $${\mathrm{AE}}_{\mathrm{gp}}=\mathrm{0,5}\times {\mathrm{AE}}_c+\mathrm{0,5}\times {\mathrm{AE}}_{\mathrm{hf}}$$

where:

• ASE_c is the average specific energy consumption in Wh/m² during carpet test, calculated as provided below

• ASE_hf is the average specific energy consumption in Wh/m² during hard floor test, calculated as provided below

• dpu_c is the dust pick-up on carpet, determined in accordance with point 4 of this Annex

• dpu_hf is the dust pick-up on hard floor, determined in accordance with point 4 of this Annex

• 50 is the standard number of one-hour cleaning tasks per year

• 87 is the standard dwelling surface to be cleaned in m²

• 4 is the standard number of times that a vacuum cleaner passes over each point on the floor (two double strokes)

• 0,001 is the conversion factor from Wh to kWh

• 1 is the standard dust pick-up

• 0,20 is the standard difference between dust pick-up after five and after two double strokes.