Division 2 Technical parameters of water heaters

The following parameters shall be calculated for water heaters under average climate conditions:

1. (a)

   the water heating energy efficiency η_wh in %, rounded to one decimal place;

2. (b)

   the annual electricity consumption AEC in kWh in terms of final energy, rounded to the nearest integer;

in addition, for water heaters using fuels under average climate conditions:

1. (c)

   the annual fuel consumption AFC in kWh in terms of GCV, rounded to the nearest integer;

in addition, for solar water heaters under average climate conditions:

1. (d)

   the heat generator water heating energy efficiency η_wh,nonsol in %, rounded to one decimal place;

2. (e)

   the annual auxiliary electricity consumption Q_aux in kWh in terms of final energy, rounded to one decimal place;

in addition, for solar water heaters and heat pump water heaters under colder and warmer climate conditions:

1. (f)

   the parameters set out in points (a) to (c);

in addition for solar water heaters under average, colder and warmer climate conditions:

1. (g)

   the annual non-solar heat contribution Q_nonsol in kWh in terms of primary energy for electricity and/or in kWh in terms of GCV for fuels, rounded to one decimal place.