Company lists · Data refreshed September 2026

Top 25 Geothermal equipment system manufacturers based in the United Kingdom

Name: Geothermal equipment system manufacturers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 75 companies tracked

RevenueBase identified 75 company matches for geothermal equipment system manufacturers associated with the United Kingdom as of September 2026 and tracks 533 professional contacts across them, including 200 with verified work emails. London is the largest hub.

This list covers company matches for geothermal equipment system manufacturers 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 September 30, 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 Sep 30, 2026 How this list was built

75Companies

533Contacts tracked

200Verified emails

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The 25 largest geothermal equipment system manufacturers based in the United Kingdom

Ranked by team size

Top 25 of 75 company matches for geothermal equipment system manufacturers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 30, 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	Nu-Heat Underfloor Heating & Renewables	Exact match	Honiton, United KingdomHQ recorded Sep 30, 2026	51-200	70 contacts →
	Exact match “As the UK's largest supplier of warm water underfloor heating and integrated renewables, Nu‑Heat delivers fully designed, energy efficient systems to installers, housebuilders…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
2	Rendesco	Exact match	London, United KingdomHQ recorded Sep 30, 2026	51-200	60 contacts →
	Exact match “Rendesco is the UK’s leading clean energy tech developer and operator, focusing on the electrification of heat using heat pumps and heat networks to decarbonise Britain’s…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
3	Lochinvar, UK	Exact match	Banbury, United KingdomHQ recorded Sep 30, 2026	11-50	40 contacts →
	Exact match “Lochinvar designs, manufactures and distributes a comprehensive range of high efficiency gas fired water heaters and boilers for commercial and industrial applications.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
4	Johnson & Starley LTD	Exact match	Northampton, United KingdomHQ recorded Sep 30, 2026	51-200	26 contacts →
	Exact match “As a market leader in providing energy efficient heating and ventilation solutions, Johnson & Starley has an impressive portfolio of products.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
5	Drilcorp	Exact match	Seaham, United KingdomHQ recorded Sep 30, 2026	11-50	21 contacts →
	Exact match “Drilcorp was established in 1992 and since then has developed into one of the UK’s top drilling companies.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
6	Nicholls Boreholes & Ground Source	Exact match	Kirdford, United KingdomHQ recorded Sep 30, 2026	51-200	14 contacts →
	Exact match “Nicholls Boreholes & Ground Source is an established, industry leading, family-run, specialist drilling company.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
7	Townrock Energy	Exact match	Edinburgh City, United KingdomHQ recorded Sep 30, 2026	11-50	14 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 · Sep 30, 2026 · View company records in RevenueBase
8	Synergy Boreholes LTD	Exact match	Aylesbury, United KingdomHQ recorded Sep 30, 2026	11-50	14 contacts →
	Exact match “We specialise in Geothermal Ground Source Boreholes and Water Boreholes up to 300m.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
9	GO Geothermal LTD	Exact match	Newton Aycliffe, United KingdomHQ recorded Sep 30, 2026	11-50	11 contacts →
	Exact match “Go Geothermal Ltd has supplied the UK market with high quality air and ground source heat pumps and associated components since 2006.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
10	Omnie Underfloor Heating, Heat Pumps & Ventilation	Exact match	Exeter, United KingdomHQ recorded Sep 30, 2026	51-200	10 contacts →
	Exact match “OMNIE design and manufacture high performance underfloor heating systems as well as whole house technologies such as ventilation and heat pumps.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
11	The Energy LAB UK	Exact match	Barnstaple, United KingdomHQ recorded Sep 30, 2026	1-10	9 contacts →
	Exact match “Energy Lab has been supporting specifiers, developers and installers of geothermal and air source heat pumps since 2012.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
12	Genius Energy LAB Ground Source Heat Pump System And Heat Network Designers	Exact match	Market Bosworth, United KingdomHQ recorded Sep 30, 2026	11-50	9 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 · Sep 30, 2026 · View company records in RevenueBase
13	Erda Energy	Exact match	London, United KingdomHQ recorded Sep 30, 2026	1-10	9 contacts →
	Exact match “Smart, sustainable heating and cooling, powered by the earth.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
14	Dore Woodman Limited	Exact match	Lingfield, United KingdomHQ recorded Sep 30, 2026	1-10	7 contacts →
	Exact match “Dore Woodman are an MCS Accredited supplier and installer of renewable heating solutions and cover Kent, Surrey, Sussex and South London.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
15	GT Energy UK LTD Part Of Star Energy Group PLC	Exact match	Lincoln, United KingdomHQ recorded Sep 30, 2026	1-10	7 contacts →
	Exact match “GT Energy is the leading developer of deep geothermal energy projects in the UK and Ireland.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
16	Clayton Thermal Products LTD	Exact match	Runcorn, United KingdomHQ recorded Sep 30, 2026	11-50	6 contacts →
	Exact match “Clayton Steam System Solutions is an international group with a reputation for technological advance and innovation.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
17	Muovitech UK Limited	Exact match	Wilpshire, United KingdomHQ recorded Sep 30, 2026	1-10	5 contacts →
	Exact match “MuoviTech are the European leaders, supplying products for geothermal energy collection systems throughout the UK and Europe with own factories in Sweden, Finland, Poland…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
18	Orangehouse Renewables LTD	Exact match	Peterborough, United KingdomHQ recorded Sep 30, 2026	11-50	5 contacts →
	Exact match “Orangehouse Renewables is an accredited and award winning renewable energy company.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
19	Onsen Energy	Exact match	Bordon, United KingdomHQ recorded Sep 30, 2026	11-50	4 contacts →
	Exact match “At Onsen Energy, we provide homeowners, developers, sports clubs, schools and the wider energy market with ground source heating systems and drilling services.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
20	Primeval Energy LTD	Exact match	Cambridge, United KingdomHQ recorded Sep 30, 2026	1-10	4 contacts →
	Exact match “Primeval Energy is a geothermal solutions company, newly established by seasoned oil and gas, geothermal, finance and commercial professionals.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
21	Flair Handling Systems LTD	Exact match	Birstall, United KingdomHQ recorded Sep 30, 2026	11-50	3 contacts →
	Exact match “With over twenty years of manufacturing experience we currently supply an ever widening range of air handling equipment and packaged boiler & tank rooms to the UK mechanical…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
22	Zegen Energy	Exact match	Aberdeen, United KingdomHQ recorded Sep 30, 2026	1-10	3 contacts →
	Exact match “In a world that is looking for clean, reliable, and renewable energy solutions, ZeGen Energy has developed a model to effectively identify potential heat and power production by…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
23	Drift Services Group	Exact match	Hereford, United KingdomHQ recorded Sep 30, 2026	1-10	3 contacts →
	Exact match “At Drift, we deliver precision drilling solutions that unlock secure water supplies and sustainable energy for projects across the UK.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
24	Hevac LTD	Exact match	East Kilbride, United KingdomHQ recorded Sep 30, 2026	1-10	3 contacts →
	Exact match “Hevac supply biomass boilers,combined heat and power,heat pumps,solar thermal,low nox boilers,underfloor heating,feature radiators,low surface temp radiators.we will adivise on…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
25	Groundsource UK LTD	Exact match	Heath Road, United KingdomHQ recorded Sep 30, 2026	1-10	1 contacts →
	Exact match “GroundSource UK offers specialist subcontract installation services to renewable energy contractors covering all aspects of ground source heat pump systems.” Recorded in the RevenueBase company graph · Sep 30, 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 “geothermal equipment system manufacturers”. 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 75 geothermal equipment system manufacturers based in the United Kingdom

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Geothermal equipment system manufacturers based in the United Kingdom at a glance

As of Sep 30, 2026

37.5%Verified-email coverage

7.1Average contacts per company

1-10Median size (employees)

9.3%Largest-city concentration · London

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 75 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 “geothermal equipment system manufacturers” 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 200 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 September 30, 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 “geothermal equipment system manufacturers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal equipment system manufacturers are there based in the United Kingdom?

RevenueBase identified 75 company matches for geothermal equipment system manufacturers associated with the United Kingdom as of September 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?

Nu-Heat Underfloor Heating & Renewables tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most geothermal equipment system manufacturers?

London leads with 7 company records, followed by Derby (2) and Northampton (2).

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 200 professional contacts with verified work emails tracked across these 75 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 September 30, 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.