{ "name": "commercialheatpumpcost.co.uk Certified Installer Register", "title": "Certified Installer Register", "url": "https://commercialheatpumpcost.co.uk/datasets/certified-installer-register/", "csv": "https://commercialheatpumpcost.co.uk/datasets/certified-installer-register.csv", "markdown": "https://commercialheatpumpcost.co.uk/datasets/certified-installer-register/index.md", "computed_at": "2026-10-24", "license": "https://commercialheatpumpcost.co.uk/terms", "headline": "The Certified Installer Register carries 2 published figures read from 2 sources' own pages, from 2,215 to 10,000 count, read 11 October 2026.", "quotes": [ "The Certified Installer Register carries 2 published figures read from 2 sources' own pages, from 2,215 to 10,000 count, read 11 October 2026.", "3 of the 10 named sources read in full publish a figure; 7 publish none, read 11 October 2026.", "Certified Installer Register, certification (MCS, F-gas company, consumer code) F-gas company (REFCOM): median 10,000 count across 1 source, read 11 October 2026.", "Certified Installer Register, certification (MCS, F-gas company, consumer code) MCS certified companies (all technologies): median 5,620 mcs across 1 source, read 11 October 2026.", "Certified Installer Register, certification (MCS, F-gas company, consumer code) MCS heat pump installers: median 2,215 count across 1 source, read 11 October 2026." ], "citation": "\"commercialheatpumpcost.co.uk Certified Installer Register\", updated 2026-10-24, https://commercialheatpumpcost.co.uk/datasets/certified-installer-register/.", "changed_since": null, "national": { "unit": "count", "n": 2, "median": 6107.5, "min": 2215, "max": 10000, "p25": null, "p75": null, "mean": 6107.5, "units": { "count": 2, "mcs": 1 }, "published_sources": 3, "named_sources": 10, "read_sources": 10, "not_published": 7, "published_share": 0.3 }, "by_axis": { "certification (MCS, F-gas company, consumer code)": { "F-gas company (REFCOM)": { "count": { "n": 1, "median": 10000, "min": 10000, "max": 10000, "p25": 10000, "p75": 10000, "mean": 10000 } }, "MCS certified companies (all technologies)": { "mcs": { "n": 1, "median": 5620, "min": 5620, "max": 5620, "p25": 5620, "p75": 5620, "mean": 5620 } }, "MCS heat pump installers": { "count": { "n": 1, "median": 2215, "min": 2215, "max": 2215, "p25": 2215, "p75": 2215, "mean": 2215 } } } }, "rows": [ { "source": "REFCOM - F-gas company registration scheme", "url": "https://www.refcom.org.uk/f-gas", "figure": "10,000", "value": 10000, "unit": "count", "vat": null, "axis": { "certification (MCS, F-gas company, consumer code)": "F-gas company (REFCOM)" }, "retrieved_at": "2026-10-11", "quote": "Join the UK's Original and Trusted F-Gas Register, Backed by 10,000 Loyal Contractors.", "source_class": "first-party-index", "text_sha256": "8399377da947af6fdc2579f75e9c9ee207f2483cb4c46cb3e41fbe93baa5e12e" }, { "source": "Find Certified Installers", "url": "https://findcertifiedinstallers.co.uk/", "figure": "5,620 MCS certified companies", "value": 5620, "unit": "mcs", "vat": null, "axis": { "certification (MCS, F-gas company, consumer code)": "MCS certified companies (all technologies)" }, "retrieved_at": "2026-10-11", "quote": "5,620 MCS certified companies across 197 UK towns.", "source_class": "secondary", "text_sha256": "6bdbf2dbf0e5cb03557d7c519e6e4c05e7b4cfd14bf992f88ff0b0425c6c6847" }, { "source": "Find Heat Pump", "url": "https://findheatpump.co.uk/", "figure": "2,215", "value": 2215, "unit": "count", "vat": null, "axis": { "certification (MCS, F-gas company, consumer code)": "MCS heat pump installers" }, "retrieved_at": "2026-10-11", "quote": "Every MCS-certified heat pump installer in the UK, in one place. Browse 2,215 active installers by region.", "source_class": "secondary", "text_sha256": "1fd364b7905fc9dc459bf7352a3be62f8000644d94fca84297aaa32e24a60f46" } ], "not_published": [ { "source": "MCS - find an installer", "url": "https://mcscertified.com/find-an-installer/", "retrieved_at": "2026-10-11", "reason": "read in full and no accepted figure on the page" }, { "source": "MCS - installers", "url": "https://mcscertified.com/installers/", "retrieved_at": "2026-10-11", "reason": "read in full and no accepted figure on the page" }, { "source": "REFCOM - registered company search", "url": "https://www.refcom.org.uk/refcom-register", "retrieved_at": "2026-10-11", "reason": "read in full and no accepted figure on the page" }, { "source": "REFCOM - F-gas certification guidance", "url": "https://www.refcom.org.uk/guidance/f-gas-certification", "retrieved_at": "2026-10-11", "reason": "every candidate on the page was refused" }, { "source": "Heat Pumps Expert - installer directory", "url": "https://www.heatpumpsexpert.com/directory", "retrieved_at": "2026-10-11", "reason": "every candidate on the page was refused" }, { "source": "FGASFind", "url": "https://fgasfind.co.uk/", "retrieved_at": "2026-10-11", "reason": "every candidate on the page was refused" }, { "source": "RECC - Boiler Upgrade Scheme", "url": "https://www.recc.org.uk/boiler-upgrade-scheme", "retrieved_at": "2026-09-11", "reason": "read in full and no accepted figure on the page" } ], "sources": [ { "url": "https://mcscertified.com/find-an-installer/", "label": "MCS - find an installer", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://mcscertified.com/installers/", "label": "MCS - installers", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.refcom.org.uk/refcom-register", "label": "REFCOM - registered company search", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.refcom.org.uk/f-gas", "label": "REFCOM - F-gas company registration scheme", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.refcom.org.uk/guidance/f-gas-certification", "label": "REFCOM - F-gas certification guidance", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://findcertifiedinstallers.co.uk/", "label": "Find Certified Installers", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://findheatpump.co.uk/", "label": "Find Heat Pump", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.heatpumpsexpert.com/directory", "label": "Heat Pumps Expert - installer directory", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://fgasfind.co.uk/", "label": "FGASFind", "license": "the publisher's own terms; quoted for reporting and comment" }, { "url": "https://www.recc.org.uk/boiler-upgrade-scheme", "label": "RECC - Boiler Upgrade Scheme", "license": "the publisher's own terms; quoted for reporting and comment" } ], "methodology": "Every row is a verbatim sentence read from the named source's own page through our fetch service on the date shown, hash-pinned to the stored read (the sha of the page's visible text; the raw page is mirrored to R2). 3 of the 10 named sources that could be read published a usable figure; 7 published none and are recorded as not published, never filled in; 0 could not be read (blocked, dead or unreachable) and count nowhere. The headline figures (median, minimum, maximum, quartiles) are over ONE figure per source in count (a source's median where its page yielded several accepted sentences), so N counts sources, never sentences; 25 candidate sentence(s) were refused by a reviewer with the reason recorded. The fuller derivation this dataset is chartered to grow into (not yet what the figures above are; they are each source's own published figure as read): the join no register publishes: the MCS certified-installer roster (which stops at 45kWth, or 70kWth across multiple units) against the F-gas COMPANY registers, which is where the competence for larger commercial plant actually sits - so a count per region of firms certified for a domestic heat pump, firms certified to handle the refrigerant in commercial plant, and the firms in BOTH, which is the real supply of installers for this buyer. Each firm's own commercial page is then read for the capacity band it states, giving coverage per region per capacity band and the change in that supply between reads", "embed": "

2,215 to 10,000 count

2 published figures, Certified Installer Register, across 2 sources, read 11 October 2026

Source: commercialheatpumpcost.co.uk Certified Installer Register
" }