Company lists · Data refreshed September 2026

Top 25 Thermal design consulting firms based in France

RevenueBase identified 732 thermal design consulting firms headquartered in France as of September 2026 and tracks 5,540 professional contacts across them, including 1,735 with verified work emails. Paris is the largest hub.

This list covers thermal design consulting firms 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 29, 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 29, 2026 86% judged on-target in blind review
732Companies
5,540Contacts tracked
1,735Verified emails
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The 25 largest thermal design consulting firms based in France

Ranked by team size
Top 25 of 732 thermal design consulting firms based in France, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to thermal design consulting firms: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceMontigny-le-bretonneux, FranceHQ checked Sep 29, 2026201-5001,066 contacts →

Indirect evidence

“BTP Consultants est un bureau de ̂, et présent à l'échelle nationale depuis plus de.”

Source: RevenueBase Database · checked Sep 29, 2026
2Partial evidenceGennevilliers, FranceHQ checked Sep 29, 202651-200107 contacts →

Partial evidence

“Depuis plus de 50 ans, SECAN est votre partenaire de choix pour concevoir et développer des solutions sur-mesure d'échange thermique.”

Source: RevenueBase Database · checked Sep 29, 2026
3Indirect evidenceParis, FranceHQ checked Sep 29, 202611-5087 contacts →

Indirect evidence

“QUI SOMMES NOUS?”

Source: RevenueBase Database · checked Sep 29, 2026
4Indirect evidencePuteaux, FranceHQ checked Sep 29, 202651-20074 contacts →

Indirect evidence

“VACOA, c’est le fruit d’un projet initié à deux par Benoit & Clément qui se sont un jour dit « Cap’ ou pas Cap’ 🤝?”

Source: RevenueBase Database · checked Sep 29, 2026
5Indirect evidenceEpinay Sur Seine, FranceHQ checked Sep 29, 202611-5073 contacts →

Indirect evidence

“Akila Ingénierie est un bureau d'études en ingénierie du bâtiment à taille humaine et proche de ses clients.”

Source: RevenueBase Database · checked Sep 29, 2026
6Partial evidenceStrasbourg, FranceHQ checked Sep 29, 202651-20072 contacts →

Partial evidence

“Solares Bauen est un bureau d’étude fluides, thermique et environnement dans le bâtiment créée en 2005 à Strasbourg.”

Source: RevenueBase Database · checked Sep 29, 2026
7Partial evidenceLevallois-perret, FranceHQ checked Sep 29, 202651-20061 contacts →

Partial evidence

“Nous sommes un bureau d’étude thermique et fluides qui encourage la conception bioclimatique et la rénovation énergétique des bâtiments.”

Source: RevenueBase Database · checked Sep 29, 2026
8Partial evidenceAvrillé, FranceHQ checked Sep 29, 202651-20052 contacts →

Partial evidence

“DAO BE Group is a full-service engineering consulting firm which provides services for public agencies and private sector companies.”

Source: RevenueBase Database · checked Sep 29, 2026
9Indirect evidencePierrelatte, FranceHQ checked Sep 29, 202651-20049 contacts →

Indirect evidence

“Sietra Provence, membre du Groupe GCC, est spécialisé en Génie Climatique et Plomberie depuis plus de 70 ans.”

Source: RevenueBase Database · checked Sep 29, 2026
10Indirect evidenceParis, FranceHQ checked Sep 29, 202611-5043 contacts →

Indirect evidence

“Bureau d'études « Fluides, Energie et Développement durable » créé en 2002, Tribu Energie synthétise à travers ses ingénieurs plus de trente années d'expérience en énergétique du…”

Source: RevenueBase Database · checked Sep 29, 2026
11Indirect evidenceCourtabœuf, FranceHQ checked Sep 29, 202611-5041 contacts →

Indirect evidence

“L’équipe AXYS, forte de son expérience dans le domaine, met en application depuis plus de 25 ans, l’ensemble des nouvelles technologies applicables aux équipements techniques des…”

Source: RevenueBase Database · checked Sep 29, 2026
12Partial evidenceLentilly, FranceHQ checked Sep 29, 202611-5040 contacts →

Partial evidence

“Lethiguel is a French high-tech brand providing thermal solutions.”

Source: RevenueBase Database · checked Sep 29, 2026
13Indirect evidenceLe Pecq, FranceHQ checked Sep 29, 202611-5038 contacts →

Indirect evidence

“ENEOR : L'ingénierie énergétique par excellence POSITIONNEMENT: Bureau d’études Technique énergétique indépendant spécialisé dans, l’ingénierie de conception, d’exécution et…”

Source: RevenueBase Database · checked Sep 29, 2026
14Partial evidenceSaint-herblain, FranceHQ checked Sep 29, 202611-5035 contacts →

Partial evidence

“EMENDA est une société d’ingénierie spécialisée dans les domaines de la thermique, des fluides et de l’environnement appliqués à dans différents domaines d’activités : bâtiment…”

Source: RevenueBase Database · checked Sep 29, 2026
15Partial evidenceMérignac, FranceHQ checked Sep 29, 202611-5034 contacts →

Partial evidence

“Bureau d’études thermique, fluides et environnement.”

Source: RevenueBase Database · checked Sep 29, 2026
16Indirect evidenceRoquefort Les Pins, FranceHQ checked Sep 29, 202611-5033 contacts →

Indirect evidence

“Leader du secteur du CVC et de l'efficacité énergétique, Osmose fournit des solutions innovantes et clés en main aux industriels.”

Source: RevenueBase Database · checked Sep 29, 2026
17Indirect evidenceGrenoble, FranceHQ checked Sep 29, 202651-20030 contacts →

Indirect evidence

“Acteur de pointe du génie climatique dans notre région depuis 1938, le groupe CISEPZ dispose d’une organisation pour entreprises et particuliers lui permettant d’étudier, de…”

Source: RevenueBase Database · checked Sep 29, 2026
18Partial evidenceThouare Sur Loire, FranceHQ checked Sep 29, 202611-5029 contacts →

Partial evidence

“Depuis plus de 35 ans, SEIM-N, situé à Thouaré sur Loire et à Bouguenais, met à votre service son expertise en génie thermique et en transport de fluides pour les secteurs…”

Source: RevenueBase Database · checked Sep 29, 2026
19Partial evidenceCroissy Beaubourg, FranceHQ checked Sep 29, 202611-5028 contacts →

Partial evidence

“Le bureau d'étude Acorus ingénierie propose la réalisation d'études de conception ou d'exécution thermique, fluides et structure pour les bailleurs sociaux, collectivités locales…”

Source: RevenueBase Database · checked Sep 29, 2026
20Partial evidenceAngers, FranceHQ checked Sep 29, 202611-5027 contacts →

Partial evidence

“BatiMgie est un bureau d’études indépendant spécialisé dans la performance énergétique des bâtiments et la maîtrise d’œuvre fluide, thermique et environnementale.”

Source: RevenueBase Database · checked Sep 29, 2026
21Indirect evidenceBeaucouzé, FranceHQ checked Sep 29, 202611-5027 contacts →

Indirect evidence

“Bureau d’études en Ingénierie Mécanique, ACTECH accompagne ses clients dans le développement de leurs projets techniques.”

Source: RevenueBase Database · checked Sep 29, 2026
22Partial evidenceCachan, FranceHQ checked Sep 29, 202611-5026 contacts →

Partial evidence

“Mechanical design: your passion, our profession.”

Source: RevenueBase Database · checked Sep 29, 2026
23Partial evidenceSelestat, FranceHQ checked Sep 29, 202611-5026 contacts →

Partial evidence

“IMAEE est un bureau d'études fluides, thermique, électricité, photovoltaïque, performance énergétique et rénovation TCE.”

Source: RevenueBase Database · checked Sep 29, 2026
24Partial evidenceOrvault, FranceHQ checked Sep 29, 202611-5025 contacts →

Partial evidence

“Bureau d’Études spécialisé en Thermique, Acoustique et Environnement pour les bâtiments neufs ou réhabilités.”

Source: RevenueBase Database · checked Sep 29, 2026
25Partial evidenceVillefranche Sur Saone, FranceHQ checked Sep 29, 202611-5024 contacts →

Partial evidence

“ABAC INGENIERIE est un bureau d études spécialisé en Fluides (Thermique,Plomberie,CVC,Electricite CFO CFA,SSI, energies renouvelables) et Structures”

Source: RevenueBase Database · checked Sep 29, 2026

Showing 25 of 732 thermal design consulting firms based in France

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Thermal design consulting firms based in France at a glance

As of Sep 29, 2026
31.3%Verified-email coverage
7.6Average contacts per company
1-10Median size (employees)
6.0%Largest-city concentration · Paris
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
536
11-50
168
51-200
20
201-500
1
5,001-10,000
1

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 732 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 thermal design consulting firms, 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 “thermal design consulting firms”. 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 thermal design consulting firms), 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 thermal design consulting firms, 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, 1,735 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 29, 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.

Thermal design consulting firms by metro

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 thermal design consulting firms, 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 thermal design consulting firms are there based in France?

RevenueBase identified 732 thermal design consulting firms 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?

BTP Consultants, headquartered in Montigny-Le-Bretonneux, tops this list with the largest team on record.

Which city has the most thermal design consulting firms?

Paris leads with 44 headquartered companies, followed by Lyon (21) and Toulouse (13).

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 1,735 verified decision-maker contacts tracked across these 732 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 29, 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.