Company lists · Data refreshed September 2026

Top 25 Geothermal equipment manufacturers based in France

Name: Geothermal equipment manufacturers based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 130 companies tracked

RevenueBase identified 130 geothermal equipment manufacturers headquartered in France as of September 2026 and tracks 1,111 professional contacts across them, including 332 with verified work emails. Pau is the largest hub.

This list covers geothermal equipment manufacturers headquartered in France, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

130Companies

1,111Contacts tracked

332Verified emails

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The 25 largest geothermal equipment manufacturers based in France

Ranked by team size

Top 25 of 130 geothermal equipment manufacturers based in France, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to geothermal equipment manufacturers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Viessmann Climate Solutions FR	Indirect evidence	Faulquemont, FranceHQ checked Sep 16, 2026	201-500	213 contacts →
	Indirect evidence “Fondé en 1917 en tant que fabricant de techniques de chauffage, et maintenant intégrés à Carrier, nous sommes aujourd'hui l'un des principaux fournisseurs mondiaux de solutions…” Source: RevenueBase Database · checked Sep 16, 2026
2	Vaillant Group France	Indirect evidence	Nantes, FranceHQ checked Sep 16, 2026	1,001-5,000	170 contacts →
	Indirect evidence “Vaillant Group est un acteur international dans le secteur des technologies de chauffage et de climatisation.” Source: RevenueBase Database · checked Sep 16, 2026
3	YACK	Indirect evidence	Saint-cyr-sur-mer, FranceHQ checked Sep 16, 2026	51-200	50 contacts →
	Indirect evidence “Fondée en YACK s’impose comme un acteur français majeur du confort thermique, grâce à une offre complète en chauffage, climatisation et eau chaude sanitaire.” Source: RevenueBase Database · checked Sep 16, 2026
4	CFG Geothermal	Indirect evidence	Orleans, FranceHQ checked Sep 16, 2026	11-50	46 contacts →
	Indirect evidence “CFG Services est une société de services et d’ingénierie, filiale à 100% du BRGM, spécialisée en géothermie qui dès le début des années 80 a été pionnière dans le développement…” Source: RevenueBase Database · checked Sep 16, 2026
5	Ariston France	Indirect evidence	Saint-denis, FranceHQ checked Sep 16, 2026	201-500	38 contacts →
	Indirect evidence “Bienvenue sur la page officielle de la marque Ariston France, fabricant de solutions pour chauffage et eau chaude.” Source: RevenueBase Database · checked Sep 16, 2026
6	Stiebel Eltron France	Indirect evidence	Metz, FranceHQ checked Sep 16, 2026	11-50	37 contacts →
	Indirect evidence “STIEBEL ELTRON est devenu un des leaders mondiaux dans le domaine du chauffage et de la production d'eau chaude sanitaire aux énergies renouvelables.” Source: RevenueBase Database · checked Sep 16, 2026
7	Lemasson	Indirect evidence	Agneaux, FranceHQ checked Sep 16, 2026	11-50	23 contacts →
	Indirect evidence “L’entreprise Lemasson créée en 1975, se situant à Agneaux dans la Manche dans la région de Normandie, est concepteur et fabricant de pompes à chaleur géothermiques.” Source: RevenueBase Database · checked Sep 16, 2026
8	Bio-Énergies Diffusion	Indirect evidence	Castanet-tolosan, FranceHQ checked Sep 16, 2026	11-50	21 contacts →
	Indirect evidence “Bio-Énergies Diffusion est le n°1 de la géothermie dans tout le Sud-Ouest de la France.” Source: RevenueBase Database · checked Sep 16, 2026
9	JCM Confort	Indirect evidence	Beaucouzé, FranceHQ checked Sep 16, 2026	11-50	21 contacts →
	Indirect evidence “Spécialistes des systèmes de chauffage basés sur les énergies renouvelables, implantés à Beaucouzé, nous intervenons sur l'ensemble de la région angevine (à Angers, Saumur…” Source: RevenueBase Database · checked Sep 16, 2026
10	TLS Geothermics	Partial evidence	Toulouse, FranceHQ checked Sep 16, 2026	11-50	16 contacts →
	Partial evidence “TLS Geothermics is a geoscience tech company, exploring and developing geothermal projects for power, heat, cold and byproducts.” Source: RevenueBase Database · checked Sep 16, 2026
11	Thorens-Energies	Indirect evidence	Fillinges, FranceHQ checked Sep 16, 2026	11-50	16 contacts →
	Indirect evidence “Thorens Énergies : l’énergie renouvelable au service d’un avenir durable.” Source: RevenueBase Database · checked Sep 16, 2026
12	Drillheat	Indirect evidence	Maisse (91), FranceHQ checked Sep 16, 2026	11-50	15 contacts →
	Indirect evidence “Expert en forage géothermique de surface.” Source: RevenueBase Database · checked Sep 16, 2026
13	Geother	Partial evidence	Nanterre, FranceHQ checked Sep 16, 2026	1-10	14 contacts →
	Partial evidence “GEOTHER is an engineering and consulting company specializing in geothermal energy and, in a general way, in renewable energies, groundwater management and hydrogeotechnics.” Source: RevenueBase Database · checked Sep 16, 2026
14	CD SUD	Indirect evidence	FranceHQ checked Sep 16, 2026	51-200	11 contacts →
	Indirect evidence “CD SUD distributeur de pompes à chaleur!” Source: RevenueBase Database · checked Sep 16, 2026
15	Veotherm Solutions Innovantes DE Pompes À Chaleur Multiservices	Indirect evidence	Chaponost, FranceHQ checked Sep 16, 2026	51-200	9 contacts →
	Indirect evidence “Veotherm, une entreprise pionnière dans le domaine des solutions éco-responsables, s'est imposée comme un acteur majeur dans la lutte contre le dérèglement climatique et la crise…” Source: RevenueBase Database · checked Sep 16, 2026
16	Geofluid	Partial evidence	Roissy-En-France, FranceHQ checked Sep 16, 2026	11-50	8 contacts →
	Partial evidence “GEOFLUID is a geothermal engineering and service company based in FRANCE, France.” Source: RevenueBase Database · checked Sep 16, 2026
17	Géotec Energie	Indirect evidence	Plaisir, FranceHQ checked Sep 16, 2026	11-50	8 contacts →
	Indirect evidence “La société Géotec Energie, filiale du Groupe Géotec, est spécialisée dans la réalisation de forages géothermiques sur sondes.” Source: RevenueBase Database · checked Sep 16, 2026
18	Otec Pompes À Chaleur	Indirect evidence	Rosheim, FranceHQ checked Sep 16, 2026	11-50	8 contacts →
	Indirect evidence “Implantée en Alsace depuis 1981, la société Otec fabrique des pompe à chaleur pour les bâtiments individuels, collectifs et tertiaires adaptées aux constructions neuves ou à la…” Source: RevenueBase Database · checked Sep 16, 2026
19	Geothermaq	Partial evidence	Pau, FranceHQ checked Sep 16, 2026	1-10	7 contacts →
	Partial evidence “GEOTHERMAQ est une société résolument engagée dans la transition énergétique.” Source: RevenueBase Database · checked Sep 16, 2026
20	Étao Vendée	Indirect evidence	Boufféré, FranceHQ checked Sep 16, 2026	11-50	7 contacts →
	Indirect evidence “Étao Vendée : l’expert des solutions de pompes à chaleur en géothermie, aquathermie et aérothermie.” Source: RevenueBase Database · checked Sep 16, 2026
21	Climatair	Indirect evidence	Atton, FranceHQ checked Sep 16, 2026	11-50	6 contacts →
	Indirect evidence “Spécialisés depuis 1984 dans les solutions de climatisation, chauffage, production d’eau chaude sanitaire et ventilation, nous mettons en œuvre notre savoir-faire pour toujours…” Source: RevenueBase Database · checked Sep 16, 2026
22	Climatika 77	Indirect evidence	Pontault Combault, FranceHQ checked Sep 16, 2026	1-10	5 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
23	Rétropac	Indirect evidence	Montgermont, FranceHQ checked Sep 16, 2026	1-10	4 contacts →
	Indirect evidence “Nous fabriquons des pompes à chaleur géothermiques, Made in France, spécialement conçues pour assurer la continuité de votre installation!” Source: RevenueBase Database · checked Sep 16, 2026
24	Oertli	Indirect evidence	FranceHQ checked Sep 16, 2026	11-50	4 contacts →
	Indirect evidence “La marque ŒRTLI a été créé en Suisse en 1929.” Source: RevenueBase Database · checked Sep 16, 2026
25	CALIS	Indirect evidence	Bischoffsheim, FranceHQ checked Sep 16, 2026	1-10	3 contacts →
	Indirect evidence “CALIS fait parti du Groupe VELUM et est fabricant de Pompes à Chaleur depuis 2008.” Source: RevenueBase Database · checked Sep 16, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: geothermal equipment manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names geothermal equipment manufacturers.
Partial evidence: Its own public description names part of geothermal equipment manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geothermal equipment manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 130 geothermal equipment manufacturers based in France

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Geothermal equipment manufacturers based in France at a glance

As of Sep 16, 2026

29.9%Verified-email coverage

8.5Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · Pau

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured worldwide rather than for France, so it is reported there. Company counts and contact totals on this page are exact for France, over 130 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among geothermal equipment manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in France whose own description of what they do matches “geothermal equipment manufacturers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names geothermal equipment manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among geothermal equipment manufacturers, and records with no verified work email. Companies headquartered outside France are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 332 across the full list. 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 16, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names geothermal equipment manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many geothermal equipment manufacturers are there based in France?

RevenueBase identified 130 geothermal equipment manufacturers headquartered in France as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Viessmann Climate Solutions FR, headquartered in Faulquemont, tops this list with the largest team on record.

Which city has the most geothermal equipment manufacturers?

Pau leads with 3 headquartered companies, followed by Chateauneuf-De-Galaure (2) and Nanterre (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 332 verified decision-maker contacts tracked across these 130 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 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 Smart Search, 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.