# Commission Regulation (EU) No 814/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for water heaters and hot water storage tanks (Text with EEA relevance), Division 6: TECHNICAL PARAMETERS OF WATER HEATERS

Extent: E+W+S+N.I.

The following parameters shall be established for water heaters:
(a) the daily electricity consumption Qelec in kWh, rounded to three decimal places;
(b) the declared load profile, expressed by the appropriate letter in accordance with Table 1 of this Annex;
(c) the sound power level LWA , 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:
(d) the daily fuel consumption Qfuel in kWh in terms of GCV, rounded to three decimal places;
(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’:
(f) the weekly fuel consumption with smart controls Qfuel,week,smart in kWh in terms of GCV, rounded to three decimal places;
(g) the weekly electricity consumption with smart controls Qelec,week,smart in kWh, rounded to three decimal places;
(h) the weekly fuel consumption without smart controls Qfuel,week in kWh in terms of GCV, rounded to three decimal places;
(i) the weekly electricity consumption without smart controls Qelec,week in kWh, rounded to three decimal places;
in addition, for storage water heaters with declared load profiles 3XS, XXS and XS:
(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:
(k) the mixed water at 40 °C V40 in litres, rounded to the nearest integer;
in addition, for solar water heaters:
(l) the collector aperture area Asol in m2, rounded to two decimal places;
(m) the zero-loss efficiency η0 , rounded to three decimal places;
(n) the first-order coefficient a1 in W/(m2 K), rounded to two decimal places;
(o) the second-order coefficient a2 in W/(m2 K2), rounded to three decimal places;
(p) the incidence angle modifier IAM, rounded to two decimal places;
(q) the pump power consumption solpump in W, rounded to two decimal places;
(r) the standby power consumption solstandby in W, rounded to two decimal places;
in addition, for heat pump water heaters:
(s) the sound power level LWA in dB, outdoors, rounded to the nearest integer.

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Source: https://www.legislation.gov.uk/eur/2013/814/annex/III/division/6 (the official version)
Page: https://openlegislation.uk/eu-regulation-2013-814/annex-III/division-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.