# 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 5: DETERMINATION OF THE AMBIENT CORRECTION TERM Qcor

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

The ambient correction term is calculated as follows:
(a) for conventional water heaters using electricity:
Q cor = − k × CC × Q elec × 1 − SCF × smart − Q ref
(b) for conventional water heaters using fuels:
Q cor = − k × Q fuel × 1 − SCF × smart − Q ref
(c) for heat pump water heaters:
Q cor = − k × 24h × P stby
Where:
the k-values are given in Table 6 for each load profile.
Table 6
k-values
3XS
XXS
XS
S
M
L
XL
XXL
3XL
4XL
k
0,23
0,23
0,23
0,23
0,23
0,23
0,23
0,0
0,0
0,0

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Source: https://www.legislation.gov.uk/eur/2013/814/annex/IV/division/5 (the official version)
Page: https://openlegislation.uk/eu-regulation-2013-814/annex-IV/division-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.