Division 2.1 Calculation of the Energy Efficiency Index (EEIhood)

The Energy Efficiency Index (EEI_hood ) is calculated as:

and is rounded to the first decimal place.

Where:

• SAEC_hood is the Standard Annual Energy consumption of the domestic range hood in kWh/a, rounded to the first decimal place,

• AEC_hood is the Annual Energy Consumption of the domestic range hood in kWh/a, rounded to the first decimal place.

The Standard Annual Energy Consumption (SAEC_hood ) of a domestic range hood shall be calculated as:

Where:

• W_BEP is the electric power input of the domestic range hood at the best efficiency point, in Watt and rounded to the first decimal place,

• W_L is the nominal electric power input of the lighting system of the domestic range hood on the cooking surface, in Watt and rounded to the first decimal place.

The Annual Energy Consumption (AEC_hood ) of a domestic range hood is calculated as:

1. (i)

   for the fully automatic domestic range hoods:

   X1${\mathrm{AEC}}_{\mathrm{hood}}=\left[\frac{\left(W_{\mathrm{BEP}}\times t_H\times f\right)+\left(W_L\times t_L\right)}{60\times 1000}+\frac{P_o\times \left(1440-t_H\times f\right)}{2\times 60\times 1000}+\frac{P_s\times \left(1440-t_H\times f\right)}{2\times 60\times 1000}\right]\times 365$

2. (ii)

   for all other domestic range hoods:

   $${\mathrm{AEC}}_{\mathrm{hood}}=\frac{\left[W_{\mathrm{BEP}}\times \left(t_H\times f\right)+W_L\times t_L\right]}{60\times 1000}\times 365$$

   Where:

   • t_L is the average lighting time per day, in minutes (t_L = 120),

   • t_H is the average running time per day for domestic range hoods, in minutes (t_H = 60),

   • P_o is the electric power input in off-mode of the domestic range hood, in Watt and rounded to the second decimal place,

   • P_s is the electric power input in standby mode of the domestic range hood, in Watt and rounded to the second decimal place,

   • f is the time increase factor, calculated and rounded to the first decimal place, as:

     $$f=2-\left({\mathrm{FDE}}_{\mathrm{hood}}\times \mathrm{3,6}\right)∕100$$