Division 6 Seasonal space heating energy efficiency of electric heat pumps:

For the purposes of the measurements of heat pumps the indoor ambient temperature shall be set at 20 °C;

While establishing the sound power level, the operating conditions shall be the standard rating conditions set out in Table 16 (air-to-air heat pumps), Table 19 (water/brine-to-air heat pumps);

The active mode seasonal coefficient of performance SCOP_on shall be calculated on the basis of the part load for heating P_h(T_j), the electric back-up heating capacity elbu(T_j ) (if applicable) and the bin-specific coefficient of performance COP_bin (T_j) and weighted by the bin-hours the bin conditions occurs, and shall take into account:

1. (1)

   the reference design conditions set out in Table 24;

2. (2)

   the European ‘average’ heating season set out in Table 26;

3. (3)

   if applicable, the effects of the degradation of the energy efficiency caused by cycling depending on the type of control of the heating capacity;

The reference annual heating demand Q_H shall be the design heating load P_design,h multiplied by the equivalent active mode hours for heating H_HE set out in Table 29;

The annual energy consumption for heating Q_HE shall be calculated as the sum of:

1. (1)

   the ratio of the reference annual heating demand Q_H and the active mode seasonal coefficient of performance SCOP_on; and

2. (2)

   the energy consumption for thermostat-off, standby, off and crankcase heater mode during the season;

The seasonal coefficient of performance SCOP shall be calculated as the ratio of the reference annual heating demand Q_H and the annual energy consumption for heating Q_HE ;

The seasonal space heating energy efficiency η_s,h shall be calculated as the seasonal coefficient of performance SCOP divided by the conversion coefficient CC, corrected by contributions accounting for temperature control and for water/brine-to-air heat pumps only, the electricity consumption of ground water pump(s);

For multi-split heat pumps the measurement and calculations shall be based on the performance of the outdoor unit, with a combination of indoor unit(s) recommended by the manufacturer or importer.