Company lists · Data refreshed September 2026

Top 25 Geothermal heating installers based in Germany

Name: Geothermal heating installers based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 542 companies tracked

RevenueBase identified 542 geothermal heating installers headquartered in Germany as of September 2026 and tracks 2,193 professional contacts across them, including 679 with verified work emails. Berlin is the largest hub.

This list covers geothermal heating installers headquartered in Germany, 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 19, 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 19, 2026 86% judged on-target in blind review

542Companies

2,193Contacts tracked

679Verified emails

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The 25 largest geothermal heating installers based in Germany

Ranked by team size

Top 25 of 542 geothermal heating installers based in Germany, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to geothermal heating installers: 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	Energieversum EIN Unternehmen DER Enbw Gruppe	Indirect evidence	Steinhagen, GermanyHQ checked Sep 19, 2026	201-500	162 contacts →
	Indirect evidence “Mit Premium-Photovoltaikanlagen und Wärmepumpen im Komplettpaket erleichtern wir seit 2010 Privat- und Gewerbekunden bundesweit den Umstieg auf eine unabhängige, nachhaltige…” Source: RevenueBase Database · checked Sep 19, 2026
2	ENTER	Indirect evidence	Berlin, GermanyHQ checked Sep 19, 2026	51-200	136 contacts →
	Indirect evidence “Enter ist ein bundesweit tätiger Anbieter von Wärmepumpen, Solaranlagen (Photovoltaik) mit Stromspeicher, Wallboxen und Energiemanagement-Systemen für Eigenheimbesitzer in…” Source: RevenueBase Database · checked Sep 19, 2026
3	August Brötje Gmbh	Partial evidence	Rastede, GermanyHQ checked Sep 19, 2026	201-500	112 contacts →
	Partial evidence “BRÖTJE efficient heating system technology.” Source: RevenueBase Database · checked Sep 19, 2026
4	Pewo Energietechnik Gmbh	Indirect evidence	Elsterheide, GermanyHQ checked Sep 19, 2026	201-500	100 contacts →
	Indirect evidence “Mit innovativer Technik zur Übergabe und Verteilung von Wärme auf der entscheidenden „letzten Meile“ vereinfacht und beschleunigt PEWO die Integration regenerativer Energiequellen.” Source: RevenueBase Database · checked Sep 19, 2026
5	Baugrund SÜD Gesellschaft FÜR Geothermie MBH	Partial evidence	Bad Wurzach, GermanyHQ checked Sep 19, 2026	51-200	50 contacts →
	Partial evidence “BauGrund Süd Gesellschaft für Geothermie mbH is an utilities company based out of MAYBACHSTRASSE 5, Bad Wurzach, Germany.” Source: RevenueBase Database · checked Sep 19, 2026
6	E-Con	Indirect evidence	Memmingen, GermanyHQ checked Sep 19, 2026	51-200	47 contacts →
	Indirect evidence “e-con AG Die e-con AG ist seit 20 Jahren im Einsatz für erneuerbare Energien und versteht sich als Partner für die Energiewende.” Source: RevenueBase Database · checked Sep 19, 2026
7	Wegatech	Indirect evidence	Köln, GermanyHQ checked Sep 19, 2026	51-200	37 contacts →
	Indirect evidence “heimWatt hat Ende Januar 2025 u.a.” Source: RevenueBase Database · checked Sep 19, 2026
8	Remeha	Indirect evidence	Saerbeck, GermanyHQ checked Sep 19, 2026	51-200	34 contacts →
	Indirect evidence “Mit smarten Qualitätsprodukten, persönlichem Service und exakt passenden Lösungen bringen wir genau das richtige Maß an Wärme zu unseren Kunden.” Source: RevenueBase Database · checked Sep 19, 2026
9	Waterkotte Gmbh	Indirect evidence	Herne, GermanyHQ checked Sep 19, 2026	51-200	32 contacts →
	Indirect evidence “Die WATERKOTTE GmbH ist mit über 50 Jahren Erfahrung als Hersteller nachhaltiger Energiesysteme auf Basis der Wärmepumpe ein Pionier der Branche.” Source: RevenueBase Database · checked Sep 19, 2026
10	Enerpipe Gmbh	Indirect evidence	Hilpoltstein, GermanyHQ checked Sep 19, 2026	51-200	30 contacts →
	Indirect evidence “ENERPIPE GmbH steht für innovative, energiesparende Wärmesysteme, die für die Energiewende viele Vorteile bieten.” Source: RevenueBase Database · checked Sep 19, 2026
11	Calor Energy	Indirect evidence	Hamburg, GermanyHQ checked Sep 19, 2026	11-50	22 contacts →
	Indirect evidence “CALOR ENERGY is a Germany-wide partner for integrated and economically viable energy solutions across residential real estate, commercial properties, and private investment…” Source: RevenueBase Database · checked Sep 19, 2026
12	Deutsche Erdwärme	Indirect evidence	Karlsruhe, GermanyHQ checked Sep 19, 2026	11-50	21 contacts →
	Indirect evidence “Deutsche ErdWärme entwickelt, baut, finanziert und betreibt Erdwärmeanlagen zur Dekarbonisierung von Wärmenetzen.” Source: RevenueBase Database · checked Sep 19, 2026
13	Goodmen Energy Gmbh	Indirect evidence	Gräfelfing, GermanyHQ checked Sep 19, 2026	11-50	20 contacts →
	Indirect evidence “Die goodmen energy GmbH hat sich auf die Planung und Realisation von Wärme- und Kälte-Versorgung aus regenerativen Quellen spezialisiert.” Source: RevenueBase Database · checked Sep 19, 2026
14	Geoenergie Konzept Gmbh	Partial evidence	Freiberg, GermanyHQ checked Sep 19, 2026	11-50	19 contacts →
	Partial evidence “eine Gesellschaft der ENGIE-Gruppe, ist ein führendes Unternehmen für Wärme- und Kältelösungen im Bereich der Oberflächennahen Geothermie.” Source: RevenueBase Database · checked Sep 19, 2026
15	Nuuenergy	Indirect evidence	Munich, GermanyHQ checked Sep 19, 2026	11-50	18 contacts →
	Indirect evidence “nuuEnergy unterstützt Sie dabei, Ihre Heiztechnik klimafreundlich und zukunftssicher zu machen – mit moderner Wärmepumpentechnologie.” Source: RevenueBase Database · checked Sep 19, 2026
16	Futura Fundamentsysteme Gmbh	Indirect evidence	Schuby, GermanyHQ checked Sep 19, 2026	51-200	16 contacts →
	Indirect evidence “FUTURA Fundamentsysteme ist seit dem Jahr deutschlandweit führend in der Lieferung und Montage von EnergieSpar-Bodenplatten.” Source: RevenueBase Database · checked Sep 19, 2026
17	Natelberg Gebäudetechnik Gmbh	Indirect evidence	Rhauderfehn, GermanyHQ checked Sep 19, 2026	11-50	15 contacts →
	Indirect evidence “Natelberg Gebäudetechnik GmbH is a computer networking company based out of 9 Schwarzmoorstraße, Rhauderfehn, Germany.” Source: RevenueBase Database · checked Sep 19, 2026
18	Dimplex Deutschland	Indirect evidence	Kulmbach, GermanyHQ checked Sep 19, 2026	501-1,000	14 contacts →
	Indirect evidence “Sie suchen nachhaltige Lösungen zum Heizen, Kühlen, Lüften, zur Warmwasserbereitung oder Wärmerückgewinnung für Ihr Wohngebäude oder Ihre Gewerbeimmobilie?” Source: RevenueBase Database · checked Sep 19, 2026
19	Wibau Haustechnik Gmbh	Indirect evidence	Schwerin, GermanyHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
20	Homeplus Gmbh	Indirect evidence	Oberhausen, GermanyHQ checked Sep 19, 2026	51-200	13 contacts →
	Indirect evidence “HomePlus steht für smarte Energielösungen, die einfach, bezahlbar und nachhaltig sind.” Source: RevenueBase Database · checked Sep 19, 2026
21	H&s Energiesysteme	Indirect evidence	Willich, GermanyHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “Die Herausforderung unserer Generation ist der Klimawandel, eine Mammutaufgabe.” Source: RevenueBase Database · checked Sep 19, 2026
22	Matari Gmbh	Indirect evidence	Ahrensburg, GermanyHQ checked Sep 19, 2026	51-200	10 contacts →
	Indirect evidence “Energielösungen und Heizsysteme von Matari: Für Ihre Zukunft Unsere Mission ist es, die Häuser und Hallen in unserer Region mit grüner, günstiger Energie und Wärme zu versorgen…” Source: RevenueBase Database · checked Sep 19, 2026
23	Systeno Gmbh	Indirect evidence	Frankfurt, GermanyHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “comfort.energy.service.” Source: RevenueBase Database · checked Sep 19, 2026
24	Erdwärme Grünwald Gmbh	Indirect evidence	Grünwald, GermanyHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
25	Geothermie Unterhaching	Indirect evidence	Unterhaching, GermanyHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “Unterhachings sichere und umweltfreundliche Wärmeversorgung für Generationen.” Source: RevenueBase Database · checked Sep 19, 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 heating installers. 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 heating installers.
Partial evidence: Its own public description names part of geothermal heating installers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geothermal heating installers. 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 542 geothermal heating installers based in Germany

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Geothermal heating installers based in Germany at a glance

As of Sep 19, 2026

31.0%Verified-email coverage

4.0Average contacts per company

1-10Median size (employees)

4.4%Largest-city concentration · Berlin

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

276

11-50

142

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 542 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 heating installers, 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 Germany whose own description of what they do matches “geothermal heating installers”. 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 heating installers), 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 heating installers, and records with no verified work email. Companies headquartered outside Germany 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, 679 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 19, 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 heating installers, 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 heating installers are there based in Germany?

RevenueBase identified 542 geothermal heating installers headquartered in Germany 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?

Energieversum EIN Unternehmen DER Enbw Gruppe, headquartered in Steinhagen, tops this list with the largest team on record.

Which city has the most geothermal heating installers?

Berlin leads with 24 headquartered companies, followed by Hamburg (14) and Dusseldorf (6).

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 679 verified decision-maker contacts tracked across these 542 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 19, 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.