{
  "url": "https://openlegislation.uk/eu-regulation-2013-811/annex-II/division-2",
  "json_url": "https://openlegislation.uk/eu-regulation-2013-811/annex-II/division-2.json",
  "legislation": "eur/2013/811",
  "legislation_title": "Commission Delegated Regulation (EU) No 811/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of space heaters, combination heaters, packages of space heater, temperature control and solar device and packages of combination heater, temperature control and solar device (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2013-811",
  "path": "annex/II/division/2",
  "kind": "division",
  "number": "2",
  "heading": "WATER HEATING ENERGY EFFICIENCY CLASSES",
  "text": "The water heating energy efficiency class of a combination heater shall be determined on the basis of its water heating energy efficiency as set out in Table 3.\nThe water heating energy efficiency of a combination heater shall be calculated in accordance with point 5 of Annex VII.\nTable 3\nWater heating energy efficiency classes of combination heaters, categorised by declared load profiles, ηwh in %\n3XS\nXXS\nXS\nS\nM\nL\nXL\nXXL\nA+++\nηwh ≥ 62\nηwh ≥ 62\nηwh ≥ 69\nηwh ≥ 90\nηwh ≥ 163\nηwh ≥ 188\nηwh ≥ 200\nηwh ≥ 213\nA++\n53 ≤ ηwh < 62\n53 ≤ ηwh < 62\n61 ≤ ηwh < 69\n72 ≤ ηwh < 90\n130 ≤ ηwh < 163\n150 ≤ ηwh < 188\n160 ≤ ηwh < 200\n170 ≤ ηwh < 213\nA+\n44 ≤ ηwh < 53\n44 ≤ ηwh < 53\n53 ≤ ηwh < 61\n55 ≤ ηwh < 72\n100 ≤ ηwh < 130\n115 ≤ ηwh < 150\n123 ≤ ηwh < 160\n131 ≤ ηwh < 170\nA\n35 ≤ ηwh < 44\n35 ≤ ηwh < 44\n38 ≤ ηwh < 53\n38 ≤ ηwh < 55\n65 ≤ ηwh < 100\n75 ≤ ηwh < 115\n80 ≤ ηwh < 123\n85 ≤ ηwh < 131\nB\n32 ≤ ηwh < 35\n32 ≤ ηwh < 35\n35 ≤ ηwh < 38\n35 ≤ ηwh < 38\n39 ≤ ηwh < 65\n50 ≤ ηwh < 75\n55 ≤ ηwh < 80\n60 ≤ ηwh < 85\nC\n29 ≤ ηwh < 32\n29 ≤ ηwh < 32\n32 ≤ ηwh < 35\n32 ≤ ηwh < 35\n36 ≤ ηwh < 39\n37 ≤ ηwh < 50\n38 ≤ ηwh < 55\n40 ≤ ηwh < 60\nD\n26 ≤ ηwh < 29\n26 ≤ ηwh < 29\n29 ≤ ηwh < 32\n29 ≤ ηwh < 32\n33 ≤ ηwh < 36\n34 ≤ ηwh < 37\n35 ≤ ηwh < 38\n36 ≤ ηwh < 40\nE\n22 ≤ ηwh < 26\n23 ≤ ηwh < 26\n26 ≤ ηwh < 29\n26 ≤ ηwh < 29\n30 ≤ ηwh < 33\n30 ≤ ηwh < 34\n30 ≤ ηwh < 35\n32 ≤ ηwh < 36\nF\n19 ≤ ηwh < 22\n20 ≤ ηwh < 23\n23 ≤ ηwh < 26\n23 ≤ ηwh < 26\n27 ≤ ηwh < 30\n27 ≤ ηwh < 30\n27 ≤ ηwh < 30\n28 ≤ ηwh < 32\nG\nηwh < 19\nηwh < 20\nηwh < 23\nηwh < 23\nηwh < 27\nηwh < 27\nηwh < 27\nηwh < 28",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2013/811/annex/II/division/2",
    "retrieved_at": "2026-11-01T14:48:27.457901+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}