Company lists · Data refreshed October 2026

Top 25 Commercial geothermal contractors based in the United Kingdom

Name: Commercial geothermal contractors based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 10, 2026 193 companies tracked

RevenueBase identified 193 company matches for commercial geothermal contractors associated with the United Kingdom as of October 2026 and tracks 1,124 professional contacts across them, including 368 with verified work emails. London is the largest hub.

This list covers company matches for commercial geothermal contractors associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 10, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 10, 2026 How this list was built

193Companies

1,124Contacts tracked

368Verified emails

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The 25 largest commercial geothermal contractors based in the United Kingdom

Ranked by team size

Top 25 of 193 company matches for commercial geothermal contractors based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 10, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Cooltherm	Exact match	Bridgeyate, United KingdomHQ recorded Oct 10, 2026	51-200	52 contacts →
	Exact match “With over 30 years of expertise, Cooltherm delivers sustainable HVAC solutions across healthcare, education, construction, data centres, factories & manufacturing, and warehouse &…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
2	B-Engineering Group Certified B Corp	Exact match	Warrington, United KingdomHQ recorded Oct 10, 2026	51-200	38 contacts →
	Exact match “We are a purpose driven engineering business, passionate about our people and the environment.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
3	Artus AIR	Exact match	London, United KingdomHQ recorded Oct 10, 2026	11-50	37 contacts →
	Exact match “Artus Air is an Air Tech company dedicated to improving the way buildings are cooled and heated, globally by reducing carbon impact and improving the comfort of occupants.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
4	Aircon Services	Exact match	Princes Risborough, United KingdomHQ recorded Oct 10, 2026	11-50	27 contacts →
	Exact match “At Aircon Services, we’ve been helping companies reduce their energy costs whilst ensuring their businesses are kept cool for over 30 years.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
5	Jaga UK	Exact match	Ledbury, United KingdomHQ recorded Oct 10, 2026	11-50	26 contacts →
	Exact match “Ensuring a better indoor climate without damaging the outdoor climate.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
6	Nicholls Boreholes & Ground Source	Exact match	Kirdford, United KingdomHQ recorded Oct 10, 2026	51-200	21 contacts →
	Exact match “Nicholls Boreholes & Ground Source is an established, industry leading, family-run, specialist drilling company.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
7	HEX Energy LTD	Exact match	Nuneaton, United KingdomHQ recorded Oct 10, 2026	11-50	18 contacts →
	Exact match “Our aim is to provide renewable energy systems for properties that would clearly benefit from them.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8	JET Environmental Systems LTD	Exact match	Solihull, United KingdomHQ recorded Oct 10, 2026	11-50	17 contacts →
	Exact match “Jet Environmental designs, manufactures, installs and maintains heating, ventilation and cooling systems for large volume, industrial, commercial warehouses.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
9	Home & Industrial Heating Services Limited	Exact match	Eastleigh, United KingdomHQ recorded Oct 10, 2026	11-50	17 contacts →
	Exact match “H&I (Home & Industrial) Heating was established in 1972 as a sole trader/partnership for the Heating Industry.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
10	Envira-Mech Services LTD	Exact match	Clevedon, United KingdomHQ recorded Oct 10, 2026	11-50	16 contacts →
	Exact match “Envira-Mech Services' Vision: To create Sustainable Working environments for tomorrow by saving energy and de-carbonising Mechanical and Air Conditioning Services.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
11	Payne's Heating & Plumbing Services LTD	Exact match	Uckfield, United KingdomHQ recorded Oct 10, 2026	51-200	16 contacts →
	Exact match “Paynes has been established since 1982, as plumbing and heating specialists.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
12	Townrock Energy	Exact match	Edinburgh City, United KingdomHQ recorded Oct 10, 2026	11-50	16 contacts →
	Exact match “We are an award-winning geothermal company based in Edinburgh, Scotland and a leading specialist in all aspects of the UK’s geothermal resources.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
13	Better Planet	Exact match	Potters Bar, United KingdomHQ recorded Oct 10, 2026	11-50	14 contacts →
	Exact match “Better Planet was founded in 2004 with a vision to make it easier and more affordable to use green alternatives for heating and electricity.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
14	Renewable Heat Installations And Servicing	Exact match	Falkirk, United KingdomHQ recorded Oct 10, 2026	11-50	12 contacts →
	Exact match “Having previously worked for a large national mechanical electrical contractor in the renewable energy department, we saw a gap in the renewable energy market for quality ground…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
15	Wise Green Energy LTD	Exact match	Norwich, United KingdomHQ recorded Oct 10, 2026	11-50	12 contacts →
	Exact match “Wise Green Energy are a renewable energy installer based in Norwich, our team have over 26 years industry knowledge in all areas of the renewable energy sector.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
16	Diamond Green Energy LTD	Exact match	Fareham, United KingdomHQ recorded Oct 10, 2026	11-50	11 contacts →
	Exact match “We are a family run renewable energy installation, service and repair company based in Fareham, Hampshire.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17	Solaris Energy	Exact match	Canterbury, United KingdomHQ recorded Oct 10, 2026	11-50	11 contacts →
	Exact match “Solaris Energy was formed in January 2017 with the core of our business being focused solely on the design and installation of ground and air source heat pumps.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
18	EOC Services LTD	Exact match	Downham Market, United KingdomHQ recorded Oct 10, 2026	11-50	10 contacts →
	Exact match “EOC Services has been a specialist in the air conditioning industry since 1991.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
19	Genius Energy LAB Ground Source Heat Pump System And Heat Network Designers	Exact match	Market Bosworth, United KingdomHQ recorded Oct 10, 2026	11-50	10 contacts →
	Exact match “The team at Genius Energy Lab have been designing Ground Source Heat Pump systems for over 20 years and consider ourselves the best at what we do.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
20	Anderson Floor Warming And Renewables	Exact match	Paisley, United KingdomHQ recorded Oct 10, 2026	11-50	10 contacts →
	Exact match “Anderson Floor Warming And Renewables are total system providers, specialising in the design, supply and installation of: •Fully integrated renewable systems (geothermal, solar…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
21	Erda Energy	Exact match	London, United KingdomHQ recorded Oct 10, 2026	1-10	10 contacts →
	Exact match “Smart, sustainable heating and cooling, powered by the earth.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
22	ITC Plumbing And Heating Services Limited	Exact match	Seaham, United KingdomHQ recorded Oct 10, 2026	11-50	10 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
23	Groundsource Drilling & Contracting LTD	Exact match	Kirkby-in-ashfield, United KingdomHQ recorded Oct 10, 2026	11-50	10 contacts →
	Exact match “Groundsource Drilling & Contracting Limited is a specialised drilling contractor providing a quality, professional, and reliable drilling service to the public, private and…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24	JKN Renewables LTD	Exact match	Doncaster, United KingdomHQ recorded Oct 10, 2026	1-10	10 contacts →
	Exact match “JKN Renewables are specialists in the installation of low energy heating, cooling and hot water systems.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
25	Spire Renewables	Exact match	Caerphilly, United KingdomHQ recorded Oct 10, 2026	11-50	9 contacts →
	Exact match “Spire Renewables specialises in consulting, specifying, installing and commissioning high quality sustainable heating and energy systems.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “commercial geothermal contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 193 commercial geothermal contractors based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 368 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Commercial geothermal contractors based in the United Kingdom at a glance

As of Oct 10, 2026

32.7%Verified-email coverage

5.8Average contacts per company

1-10Median size (employees)

9.8%Largest-city concentration · London

Oct 10, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 193 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “commercial geothermal contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 368 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on October 10, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “commercial geothermal contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many commercial geothermal contractors are there based in the United Kingdom?

RevenueBase identified 193 company matches for commercial geothermal contractors associated with the United Kingdom as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Cooltherm tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most commercial geothermal contractors?

London leads with 19 company records, followed by Birmingham (3) and Bristol (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 368 professional contacts with verified work emails tracked across these 193 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 10, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.