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Division 5 CONDITIONS FOR TESTING HEAT PUMP WATER HEATERS

United Kingdom

Original text. Later amendments are not shown.

  • Heat pump water heaters shall be tested under the conditions set out in Table 4;

  • heat pump water heaters which use ventilation exhaust air as the heat source shall be tested under the conditions set out in Table 5.

Table 2

Average daytime temperature [°C]

JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
Average climate conditions2,82,67,412,216,319,821,022,017,011,95,63,2

Table 3

Average global solar irradiance [W/m2]

JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
Average climate conditions701041491922212222322171761298056

Table 4

Standard rating conditions for heat pump water heaters, temperatures in dry bulb air temperature (wet bulb air temperature indicated in brackets)

Heat sourceOutdoor airIndoor airExhaust airBrineWater
Temperature+ 7 °C (+ 6 °C)

+ 20 °C

(maximum + 15 °C)

+ 20 °C

(+ 12 °C)

0 °C (inlet)/– 3 °C (outlet)+ 10 °C (inlet)/+ 7 °C (outlet)

Table 5

Maximum ventilation exhaust air available [m3/h], at a temperature of 20 °C and with humidity of 5,5 g/m3

Declared load profile XXS XS S M L XL XXL 3XL 4XL
Maximum ventilation exhaust air available1091281281591908701 0212 9438 830