# Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for space heaters and combination heaters (Text with EEA relevance), Division (22)

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

‘reference design temperature’ (Tdesignh) means the outdoor temperature, expressed in degrees Celsius, as set out in Annex III, Table 4, at which the part load ratio is equal to 1;

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Source: https://www.legislation.gov.uk/eur/2013/813/annex/I/division/3/division/22 (the official version)
Page: https://openlegislation.uk/eu-regulation-2013-813/annex-I/division-3/division-22
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.