Division 7 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 3 of this Annex;

3. (c)

   the sound power level 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;

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

1. (e)

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

2. (f)

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

3. (g)

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

4. (h)

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

in addition, for solar water heaters:

1. (i)

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

2. (j)

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

3. (k)

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

4. (l)

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

5. (m)

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

6. (n)

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

7. (o)

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

in addition, for heat pump water heaters:

1. (p)

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