Division 6 TECHNICAL PARAMETERS OF WATER HEATERS

The following parameters shall be established for water heaters:

1. (a)

   the daily electricity consumption Q_elec in kWh, rounded to three decimal places;

2. (b)

   the declared load profile, expressed by the appropriate letter in accordance with Table 1 of this Annex;

3. (c)

   the sound power level L_WA , in dB, indoors, rounded to the nearest integer (for heat pump water heaters, if applicable);

in addition, for water heaters using fossil and/or biomass fuels:

1. (d)

   the daily fuel consumption Q_fuel in kWh in terms of GCV, rounded to three decimal places;

2. (e)

   the emissions of nitrogen oxides, expressed in nitrogen dioxide, in mg/kWh fuel input in terms of GCV, rounded to the nearest integer;

in addition, for water heaters for which the value of smart is declared as being ‘1’:

1. (f)

   the weekly fuel consumption with smart controls Q_{fuel,week,smart} in kWh in terms of GCV, rounded to three decimal places;

2. (g)

   the weekly electricity consumption with smart controls Q_{elec,week,smart} in kWh, rounded to three decimal places;

3. (h)

   the weekly fuel consumption without smart controls Q_fuel,week in kWh in terms of GCV, rounded to three decimal places;

4. (i)

   the weekly electricity consumption without smart controls Q_elec,week in kWh, rounded to three decimal places;

in addition, for storage water heaters with declared load profiles 3XS, XXS and XS:

1. (j)

   the storage volume V in litres, rounded to one decimal place;

in addition, for storage water heaters with declared load profiles M, L, XL, XXL, 3XL and 4XL:

1. (k)

   the mixed water at 40 °C V40 in litres, rounded to the nearest integer;

in addition, for solar water heaters:

1. (l)

   the collector aperture area A_sol in m², rounded to two decimal places;

2. (m)

   the zero-loss efficiency η₀ , rounded to three decimal places;

3. (n)

   the first-order coefficient a₁ in W/(m² K), rounded to two decimal places;

4. (o)

   the second-order coefficient a₂ in W/(m² K²), rounded to three decimal places;

5. (p)

   the incidence angle modifier IAM, rounded to two decimal places;

6. (q)

   the pump power consumption solpump in W, rounded to two decimal places;

7. (r)

   the standby power consumption solstandby in W, rounded to two decimal places;

in addition, for heat pump water heaters:

1. (s)

   the sound power level L_WA in dB, outdoors, rounded to the nearest integer.