Company lists · Data refreshed September 2026

Top 25 Geothermal heating installation companies worldwide

Name: Geothermal heating installation companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 7,561 companies tracked

RevenueBase identified 7,561 company matches for geothermal heating installation companies worldwide as of September 2026 and tracks 41,828 professional contacts across them, including 11,168 with verified work emails. France is the largest market and London the largest hub.

This list covers company matches for geothermal heating installation companies worldwide, 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 20, 2026. Country and city lists for geothermal heating installation companies follow the table.

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 20, 2026 How this list was built

7,561Companies

41,828Contacts tracked

11,168Verified emails

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The 25 largest geothermal heating installation companies worldwide

Ranked by team size

Top 25 of 7,561 company matches for geothermal heating installation companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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	Ormat Technologies, INC	Exact match	Reno, NV, United StatesHQ recorded Sep 20, 2026	1,001-5,000	1,281 contacts →
	Exact match “With over five decades of experience, Ormat Technologies, Inc.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2	BAXI	Exact match	Warwick, United KingdomHQ recorded Sep 20, 2026	1,001-5,000	850 contacts →
	Exact match “We're leading the energy transition to zero carbon, by offering complete residential and commercial heating and hot water solutions.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3	Feenstra	Exact match	Lelystad, NetherlandsHQ recorded Sep 20, 2026	1,001-5,000	781 contacts →
	Exact match “Sinds het ontstaan in 1947 is Feenstra marktleider in installatietechniek met een nationale dekking.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4	PT GEO Dipa Energi Persero	Exact match	Jakarta Selatan, IndonesiaHQ recorded Sep 20, 2026	201-500	501 contacts →
	Exact match “PT Geo Dipa Energi (Persero) is a State-Owned Company specializing in Geothermal Energy” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5	Semper Solaris	Exact match	El Cajon, CA, United StatesHQ recorded Sep 20, 2026	501-1,000	337 contacts →
	Exact match “Ranked #1 in Solar + Battery Installation in America by "Solar Power World" Go Solar American Style!#1 Veteran Owned Solar Company in California Solar Panels.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6	Rinnai Australia	Exact match	Braeside, AustraliaHQ recorded Sep 20, 2026	201-500	294 contacts →
	Exact match “Following Rinnai's international origins dating back more than 100 years, Rinnai Australia was established 50 years ago and since then has been providing Australians with the best…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7	Waterfurnace International	Exact match	Fort Wayne, IN, United StatesHQ recorded Sep 20, 2026	201-500	224 contacts →
	Exact match “WaterFurnace International, Inc.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8	Fervo Energy	Exact match	Houston, CA, United StatesHQ recorded Sep 20, 2026	51-200	213 contacts →
	Exact match “Fervo Energy provides 24/7 carbon-free energy through the development of next-generation geothermal power.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9	Saman Groep	Exact match	Zierikzee, NetherlandsHQ recorded Sep 20, 2026	201-500	211 contacts →
	Exact match “De energietransitie is één van de grootste maatschappelijke opgaven, maar wij begrijpen dat jouw wooncomfort net zo belangrijk is.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10	Bonarius Bedrijven	Exact match	Zwanenburg, NetherlandsHQ recorded Sep 20, 2026	201-500	186 contacts →
	Exact match “Bonarius Bedrijven De naam Bonarius was lange tijd synoniem voor de aanleg en het onderhoud van cv-installaties.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11	Energieversum EIN Unternehmen DER Enbw Gruppe	Exact match	Steinhagen, GermanyHQ recorded Sep 20, 2026	201-500	162 contacts →
	Exact match “Mit Premium-Photovoltaikanlagen und Wärmepumpen im Komplettpaket erleichtern wir seit 2010 Privat- und Gewerbekunden bundesweit den Umstieg auf eine unabhängige, nachhaltige…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12	ETECK	Exact match	Voorburg, NetherlandsHQ recorded Sep 20, 2026	51-200	149 contacts →
	Exact match “Eteck levert duurzame energie in de vorm van koude en warmte.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13	KENSA	Exact match	Truro, United KingdomHQ recorded Sep 20, 2026	51-200	143 contacts →
	Exact match “The UK’s heating system is stuck in the past, costing people and the planet too much.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14	Vaillant Group UK	Exact match	United KingdomHQ recorded Sep 20, 2026	10001+	143 contacts →
	Exact match “Founded 1874 in Germany and still family owned Vaillant employ over To which we develop and manufacture our products at 16 sites in 8 Countries, and sell our products to over 80…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15	ENTER	Exact match	Berlin, GermanyHQ recorded Sep 20, 2026	51-200	136 contacts →
	Exact match “Enter ist ein bundesweit tätiger Anbieter von Wärmepumpen, Solaranlagen (Photovoltaik) mit Stromspeicher, Wallboxen und Energiemanagement-Systemen für Eigenheimbesitzer in…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16	IDM Energiesysteme Gmbh	Exact match	Matrei, AustriaHQ recorded Sep 20, 2026	501-1,000	136 contacts →
	Exact match “WIR SORGEN FÜR IHR WOHLBEFINDEN.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17	Swale Heating Part Of Sureserve	Exact match	Sittingbourne, United KingdomHQ recorded Sep 20, 2026	201-500	136 contacts →
	Exact match “As an established heating company based in Kent, Swale Heating are proud to offer expert guidance in choosing the best heating and boiler systems & products available today.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18	Baker Home Energy	Exact match	Escondido, CA, United StatesHQ recorded Sep 20, 2026	201-500	133 contacts →
	Exact match “We’ve made some exciting changes here at Baker and we want you to be the first to know.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19	AP Renewables Inc. Aboitizpower Geothermal Unit	Exact match	United StatesHQ recorded Sep 20, 2026	201-500	133 contacts →
	Exact match “Aboitiz Power Corporation (AboitizPower, AP) is a leader in the Philippine Electric Power Industry with a portfolio of assets located across the country.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20	Vitaclim	Exact match	Montpellier, FranceHQ recorded Sep 20, 2026	201-500	132 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21	Iceland Drilling Company LTD	Exact match	IcelandHQ recorded Sep 20, 2026	51-200	128 contacts →
	Exact match “ABOUT http://iceland-drilling.com/ Iceland Drilling Ltd is a leading high technical company in the field of high temperature geothermal drilling and has many decades of experience…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22	Bring Energy	Exact match	London, United KingdomHQ recorded Sep 20, 2026	51-200	125 contacts →
	Exact match “We are Bring Energy.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23	Doğan Jeotermal Group	Exact match	Ankara, TürkiyeHQ recorded Sep 20, 2026	1,001-5,000	124 contacts →
	Exact match “Bilgi birikimini yatırıma ve tasarrufa dönüştürmek için çalışmalarını 1990 yılından bu yana sürdüren Doğan Jeotermal Group ülkemizin sahip olduğu jeotermal enerji kaynaklarını…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24	CTC AB	Exact match	Ljungby, SwedenHQ recorded Sep 20, 2026	201-500	118 contacts →
	Exact match “CTC är en av Europas ledande tillverkare av värmeprodukter.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25	Dandelion Energy	Exact match	Mount Kisco, NY, United StatesHQ recorded Sep 20, 2026	51-200	118 contacts →
	Exact match “Dandelion Energy is the nation’s leading residential geothermal provider, on a mission to make the world’s most efficient heating and cooling technology accessible to everyone.” Recorded in the RevenueBase company graph · Sep 20, 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 heating installation companies”. 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 7,561 geothermal heating installation companies worldwide

See the full list, filter by size, metro and specialty, and access 11,168 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal heating installation companies worldwide at a glance

As of Sep 20, 2026

26.7%Verified-email coverage

5.5Average contacts per company

1-10Median size (employees)

0.7%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

4,340

11-50

2,416

51-200

459

201-500

501-1,000

1,001-5,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for geothermal heating installation companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “geothermal heating installation companies” 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. 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 11,168 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 20, 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.

Geothermal heating installation companies by location

22 lists · largest first

Every Geothermal heating installation companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 heating installation companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal heating installation companies are there worldwide?

RevenueBase identified 7,561 company matches for geothermal heating installation companies worldwide 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?

Ormat Technologies, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most geothermal heating installation companies?

France leads with 917 companies, followed by the United States (829) and the United Kingdom (811). Every geothermal heating installation companies list by country and city is linked on this page.

Which city has the most geothermal heating installation companies?

London leads with 51 company records, followed by Madrid (35) and Berlin (28).

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 11,168 professional contacts with verified work emails tracked across these 7,561 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 20, 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.