# Commission Delegated Regulation (EU) No 812/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of water heaters, hot water storage tanks and packages of water heater and solar device (Text with EEA relevance), Division 6: 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 8 for each load profile.
Table 8
k-values
3XS
XXS
XS
S
M
L
XL
XXL
k
0,23
0,23
0,23
0,23
0,23
0,23
0,23
0,0

---
Source: https://www.legislation.gov.uk/eur/2013/812/annex/VIII/division/6 (the official version)
Page: https://openlegislation.uk/eu-regulation-2013-812/annex-VIII/division-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.