{
  "url": "https://openlegislation.uk/building-scotland-regulations-2004/schedule-5/paragraph-3.21",
  "json_url": "https://openlegislation.uk/building-scotland-regulations-2004/schedule-5/paragraph-3.21.json",
  "legislation": "ssi/2004/406",
  "legislation_title": "The Building (Scotland) Regulations 2004",
  "legislation_url": "https://openlegislation.uk/building-scotland-regulations-2004",
  "path": "schedule/5/paragraph/3.21",
  "kind": "paragraph",
  "number": "3.21",
  "heading": "Combustion appliances – air for combustion",
  "text": "Every building must be designed and constructed in such a way that each fixed combustion appliance installation receives air for combustion and operation of the chimney so that the health of persons within the building is not threatened by the build-up of dangerous gases as a result of incomplete combustion.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Schs. 1-6 substituted (1.5.2007) by The Building (Scotland) Amendment Regulations 2006 (S.S.I. 2006/534), regs. 1, 2(c), sch. (with regs. 3, 4)"
    }
  ],
  "outstanding_effects": [
    {
      "type": "words substituted",
      "affecting": "ssi/2025/417",
      "affecting_title": "The Energy Performance of Buildings (Scotland) Regulations 2025"
    },
    {
      "type": "words substituted",
      "affecting": "ssi/2025/417",
      "affecting_title": "The Energy Performance of Buildings (Scotland) Regulations 2025"
    },
    {
      "type": "omitted",
      "affecting": "ssi/2025/417",
      "affecting_title": "The Energy Performance of Buildings (Scotland) Regulations 2025"
    }
  ],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/ssi/2004/406/schedule/5/paragraph/3.21",
    "retrieved_at": "2026-10-28T22:29:41.303941+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."
}