{
  "url": "https://openlegislation.uk/eu-regulation-2019-1342/annex",
  "json_url": "https://openlegislation.uk/eu-regulation-2019-1342/annex.json",
  "legislation": "eur/2019/1342",
  "legislation_title": "Commission Delegated Regulation (EU) 2019/1342 of 14 March 2019 supplementing Regulation (EU) No 305/2011 of the European Parliament and of the Council by establishing classes of performance in relation to air permeability for rooflights of plastics and glass and roof hatches (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2019-1342",
  "path": "annex",
  "kind": "annex",
  "number": null,
  "heading": "Classes of performance in relation to air permeability for roof lights of plastics and glass and roof hatches",
  "text": "In case of class A, in addition to declaring the class, the worst measurement of all pressure steps shall also be declared using the following template: Class A (internal pressure (100Pa), assessed leakage rate).\nNote: The boundaries of the classes used in this Table may be derived from the following formula:\nQ = Q 100 × P 100 2 ∕ 3 Where:\nQ is the leakage rate in m3 per hour, per linear m rooflight perimeter during a test under internal pressure\nP is the internal pressure during a test (in Pa)\nQ100 is the leakage rate in m3 per hour, per linear m rooflight perimeter at an internal pressure of 100 Pa\nClass\nLower limit value of Internal Pressure(4 Pa)\nHigher limit value of Internal Pressure(100 Pa)\nAir permeability(in m3/(h.m))\nA\n< 1,4\n< 12\nB\n≥ 1,4\n≥ 12\nC\n≥ 6\n≥ 50",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "In case of class A, in addition to declaring the class, the worst measurement of all pressure steps shall also be declared using the following template: Class A (internal pressure (100Pa), assessed leakage rate)."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2019/1342/annex",
    "retrieved_at": "2026-11-01T14:43:11.321339+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."
}