{
  "url": "https://openlegislation.uk/eu-regulation-2015-1186/annex-VIII/division-4",
  "json_url": "https://openlegislation.uk/eu-regulation-2015-1186/annex-VIII/division-4.json",
  "legislation": "eur/2015/1186",
  "legislation_title": "Commission Delegated Regulation (EU) 2015/1186 of 24 April 2015 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to the energy labelling of local space heaters (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2015-1186",
  "path": "annex/VIII/division/4",
  "kind": "division",
  "number": "4",
  "heading": "Specific conditions for seasonal space heating energy efficiency",
  "text": "(a) The energy efficiency index (EEI) of all local space heaters is defined as:\nEEI = η S,on × BLF − 10 % + F 2 + F 3 − F 4 − F 5 Where\nηS,on is the seasonal space heating energy efficiency in active mode, expressed in %, calculated as set out in point 4(b),\nBLF is the biomass label factor, which is 1,45 for biomass local space heaters and 1 for fossil fuel local space heaters,\nF(2) is a correction factor accounting for a positive contribution to the energy efficiency index due to adjusted contributions of controls of indoor heating comfort, the values of which are mutually exclusive, cannot be added on top of each other, expressed in %,\nF(3) is a correction factor accounting for a positive contribution to the energy efficiency index due to adjusted contributions of controls for indoor heating comfort the values of which can be added on top of each other, expressed in %;\nF(4) is a correction factor accounting for a negative contribution to the energy efficiency index by auxiliary electricity consumption, expressed in %;\nF(5) is a correction factor accounting for a negative contribution to the energy efficiency index by energy consumption of a permanent pilot flame, expressed in %.\n(b) The seasonal space heating energy efficiency in active mode is calculated as:\nηS,on= ηth,nom\nWhere\nηth,nom is the useful efficiency at nominal heat output, based on NCV.\n(c) The correction factor F(2) accounting for a positive contribution to the energy efficiency index due to adjusted contributions of controls for indoor heating comfort, the values of which are mutually exclusive or cannot be added to each other, is calculated as follows:\nFor all local space heaters the correction factor F(2) is equal to one of the factors according to Table 4, depending on which control characteristic applies. Only one value can be selected.\nTable 4\nCorrection factor F(2)\nIf the product is equipped with (only one option may apply):\nF(2)\nFuel fired local space heaters\nsingle stage heat output, no room temperature control\n0,0 %\ntwo or more manual stages, no temperature control\n1,0 %\nwith mechanic thermostat room temperature control\n2,0 %\nwith electronic room temperature control\n4,0 %\nwith electronic room temperature control plus day timer\n6,0 %\nwith electronic room temperature control plus week timer\n7,0 %\nFrom 1 January 2022, F(2) shall be zero for solid fuel local space heaters with emissions, where the temperature control is set at the minimum heat output, higher than those set out in Annex II, point 2 of Commission Regulation (EU) 2015/1185. The heat output in this setting must not be higher than 50 % of the nominal heat output. From 1 January 2022, if F(2) is not zero the technical documentation shall include the relevant information on emissions at minimum heat output.\n(d) The correction factor F(3) accounting for a positive contribution to the energy efficiency index due to adjusted contributions of controls for indoor heating comfort, the values of which can be added to each other, is calculated as follows:\nFor all local space heaters the correction factor F(3) is the summation of the values according to Table 5, depending on which control characteristic(s) applies.\nTable 5\nCorrection factor F(3)\nIf the product is equipped with (multiple options may apply):\nF(3)\nFuel fired local space heaters\nroom temperature control with presence detection\n1,0 %\nroom temperature control with open window detection\n1,0 %\nwith distance control option\n1,0 %\nFrom 1 January 2022, F(3) shall be zero for solid fuel local space heaters with emissions, where the temperature control is set at the minimum heat output, higher than those set out in Annex II, point 2 of Regulation (EU) 2015/1185. The heat output in this setting must not be higher than 50 % of the nominal heat output. From 1 January 2022, if F(3) is not zero the technical documentation shall include the relevant information on emissions at minimum heat output.\n(e) The auxiliary electricity use correction factor F(4) is calculated as:\nThis correction factor takes into account the auxiliary electricity consumption during on-mode and standby-mode operation.\nFor all local space heaters the auxiliary electricity consumption correction is calculated as follows:\nF 4 = CC × 0,2 × el max + 0,8 × el min + 1,3 × el sb P nom × 100 % Where\nelmax is the electric power consumption at nominal heat output, expressed in kW;\nelmin is the electric power consumption at minimum heat output, expressed in kW. In case the product does not offer a minimum heat output the value for the electric power consumption at nominal heat output shall be used;\nelsb is the electric power consumption of the product while in standby mode, expressed in kW,\nPnom is the nominal heat output of the product, expressed in kW.\n(f) The correction factor F(5) related to the energy consumption of a permanent pilot flame is calculated as follows:\nThis correction factor takes into account the permanent pilot flame power requirement.\nFor all local space heaters the correction factor is calculated as:\nF 5 = 0,5 × P pilot P nom × 100 % Where\nPpilot is the pilot flame consumption, expressed in kW,\nPnom is the nominal heat output of the product, expressed in kW.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "Commission Regulation (EU) 2015/1185 of 24 April 2015 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for solid fuel local space heaters (see page 1 of this Official Journal)."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2015/1186/annex/VIII/division/4",
    "retrieved_at": "2026-11-01T14:46:34.804658+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."
}