{
 "id": "hp_devolved_standard",
 "name": "Which heat pump noise standard applies in each nation",
 "category": "heat_pump_noise",
 "value_num": null,
 "display": "England: MCS 020 a) from 29 May 2025. Scotland, Wales and Northern Ireland: MCS 020 until further notice",
 "unit": "standard in force, by nation",
 "period_start": "2025-05-29",
 "period_end": null,
 "period_kind": "page_date",
 "deadline": null,
 "source_url": "https://mcscertified.com/new-permitted-development-rules-in-england-air-source-heat-pump-installations-must-now-comply-with-mcs-020-a/",
 "source_org": "MCS",
 "checked_at": "2026-09-30",
 "recheck_by": "2026-12-29",
 "history": [],
 "public_note": "MCS says installations in England must meet MCS 020 a) from 29 May 2025, and installations in Scotland, Wales and Northern Ireland must keep meeting the older MCS 020 until further notice. The same change let English heat pumps go within 1 metre of the property boundary, which the old rules did not allow. MCS 020 a) applies whether or not the installer is MCS certified.",
 "next": null,
 "url": "https://hearthsum.co.uk/api/hp_devolved_standard.json"
}