Company lists · Data refreshed September 2026

Top 25 District heating system companies based in Germany

Name: District heating system companies based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 409 companies tracked

RevenueBase identified 409 district heating system companies headquartered in Germany as of September 2026 and tracks 6,654 professional contacts across them, including 2,873 with verified work emails. Berlin is the largest hub.

This list covers district heating system companies 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

409Companies

6,654Contacts tracked

2,873Verified emails

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The 25 largest district heating system companies based in Germany

Ranked by team size

Top 25 of 409 district heating system companies 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 district heating system companies: 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	Vaillant Group	Indirect evidence	Remscheid, GermanyHQ checked Sep 19, 2026	10001+	3,014 contacts →
	Indirect evidence “Our corporate vision shapes everything we do and inspires our employees every day.” Source: RevenueBase Database · checked Sep 19, 2026
2	BEW Berliner Energie UND Wärme Gmbh	Indirect evidence	Berlin, GermanyHQ checked Sep 19, 2026	1,001-5,000	732 contacts →
	Indirect evidence “Wärme und Energie für Berlin Als BEW Berliner Energie und Wärme sind wir Teil der Berliner Landesfamilie.” Source: RevenueBase Database · checked Sep 19, 2026
3	Stiebel Eltron Group	Indirect evidence	Holzminden, GermanyHQ checked Sep 19, 2026	5,001-10,000	493 contacts →
	Indirect evidence “STIEBEL ELTRON bietet hocheffiziente Produkte und Dienstleistungen für die Heizung, Kühlung, Lüftung und Warmwasserbereitung von Gebäuden.” Source: RevenueBase Database · checked Sep 19, 2026
4	Buderus Deutschland	Indirect evidence	Wetzlar, GermanyHQ checked Sep 19, 2026	1,001-5,000	143 contacts →
	Indirect evidence “Die Marke Buderus ist Teil der Bosch Thermotechnik GmbH und steht seit 1731 für Spitzenprodukte im Bereich Heizsysteme Ob regenerativ oder klassisch betrieben – unsere Heizsysteme…” Source: RevenueBase Database · checked Sep 19, 2026
5	August Brötje Gmbh	Strong evidence	Rastede, GermanyHQ checked Sep 19, 2026	201-500	112 contacts →
	Strong evidence “BRÖTJE efficient heating system technology.” Source: RevenueBase Database · checked Sep 19, 2026
6	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
7	Energieversorgung Oberhausen AG EVO	Indirect evidence	Oberhausen, GermanyHQ checked Sep 19, 2026	201-500	77 contacts →
	Indirect evidence “Die evo ist seit mehr als 120 Jahren der Energieversorger für Oberhausen.” Source: RevenueBase Database · checked Sep 19, 2026
8	Solvis Gmbh	Indirect evidence	Braunschweig, GermanyHQ checked Sep 19, 2026	201-500	74 contacts →
	Indirect evidence “Wer wir sind und was wir machen Wir sind ein mittelständischer Heizungshersteller aus Braunschweig und haben es uns zur Aufgabe gemacht, dem Löwenanteil des Energieverbrauchs im…” Source: RevenueBase Database · checked Sep 19, 2026
9	Danpower-Gruppe	Indirect evidence	Potsdam, GermanyHQ checked Sep 19, 2026	201-500	67 contacts →
	Indirect evidence “Die Danpower-Gruppe ist ein mittelständisch strukturiertes Wärmeversorgungs- und Contractingunternehmen.” Source: RevenueBase Database · checked Sep 19, 2026
10	Vilisto Gmbh	Partial evidence	Hamburg, GermanyHQ checked Sep 19, 2026	51-200	63 contacts →
	Partial evidence “Get your free & individual savings analysis energiesparen@vilisto.de vilisto saves companies and public clients up to 32% of heating costs by using fully automatic radiator…” Source: RevenueBase Database · checked Sep 19, 2026
11	Hansewerk Natur Gmbh	Indirect evidence	Quickborn, GermanyHQ checked Sep 19, 2026	201-500	51 contacts →
	Indirect evidence “Die HanseWerk Natur GmbH, eine 100 Prozent Tochter der HanseWerk AG, ist einer der größten regionalen Energiedienstleister in Norddeutschland und verfügt über mehrere Jahrzehnte…” Source: RevenueBase Database · checked Sep 19, 2026
12	Schwank Deutschland	Indirect evidence	Köln, GermanyHQ checked Sep 19, 2026	201-500	49 contacts →
	Indirect evidence “Vor mehr als 90 Jahren hat unser Firmengründer Günther Schwank den ersten Gas-Infrarot-Hellstrahler erfunden.” Source: RevenueBase Database · checked Sep 19, 2026
13	E.Distherm Wärmedienstleistungen Gmbh	Indirect evidence	Schönefeld, GermanyHQ checked Sep 19, 2026	51-200	39 contacts →
	Indirect evidence “e.distherm ist darauf spezialisiert, dezentrale Energielösungen auf Basis effizienter, nachhaltiger und innovativer Konzepte zu entwickeln.” Source: RevenueBase Database · checked Sep 19, 2026
14	Envola	Partial evidence	Ulm, GermanyHQ checked Sep 19, 2026	11-50	37 contacts →
	Partial evidence “The Envola System is an innovative, holistic and most sustainable approach to enable smart and efficient HVAC solutions for buildings.” Source: RevenueBase Database · checked Sep 19, 2026
15	Yados Gmbh	Indirect evidence	Hoyerswerda, GermanyHQ checked Sep 19, 2026	201-500	37 contacts →
	Indirect evidence “YADOS Wärmenetztechnik - Energie mit Zukunft yados.de » Als modernes europäisches Unternehmen liegt unser Schwerpunkt in der Entwicklung von innovativen, funktionalen Produkten…” Source: RevenueBase Database · checked Sep 19, 2026
16	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
17	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
18	Stadtwerke Kempen Gmbh	Indirect evidence	Kempen, GermanyHQ checked Sep 19, 2026	51-200	29 contacts →
	Indirect evidence “Stadtwerke Kempen mit der Sauna und Wasserwelt AquaSol Die Stadtwerke Kempen GmbH ist ein modernes, innovatives Energieversorgungsunternehmen mit den Sparten Strom, Gas, Wasser…” Source: RevenueBase Database · checked Sep 19, 2026
19	TWS Thüringer Wärme Service Gmbh	Indirect evidence	Rudolstadt, GermanyHQ checked Sep 19, 2026	51-200	27 contacts →
	Indirect evidence “Die dezentrale Energieversorgung spielt im Zuge der Energiewende eine zentrale Rolle.” Source: RevenueBase Database · checked Sep 19, 2026
20	GEF Ingenieur AG	Indirect evidence	Leimen, GermanyHQ checked Sep 19, 2026	11-50	24 contacts →
	Indirect evidence “Die GEF Ingenieur AG ist seit über 30 Jahren als unabhängiger Experte im Bereich der Wärmeversorgung etabliert.” Source: RevenueBase Database · checked Sep 19, 2026
21	Fernheizwerk Neukölln AG	Indirect evidence	Berlin, GermanyHQ checked Sep 19, 2026	51-200	24 contacts →
	Indirect evidence “Wir stehen für „Energie aus Neukölln“.” Source: RevenueBase Database · checked Sep 19, 2026
22	Richard Kablitz Gmbh	Indirect evidence	Lauda Königshofen, GermanyHQ checked Sep 19, 2026	51-200	24 contacts →
	Indirect evidence “Kablitz & Mitthof steht für umweltfreundliche Energiegewinnung aus Biomasse.” Source: RevenueBase Database · checked Sep 19, 2026
23	IEP Innovative Energie FÜR Pullach Gmbh	Strong evidence	Pullach Im Isartal, GermanyHQ checked Sep 19, 2026	11-50	23 contacts →
	Strong evidence “IEP Innovative Energie für Pullach GmbH is a geothermal and district heating operator based in Pullach im Isartal, Germany.” Source: RevenueBase Database · checked Sep 19, 2026
24	Fernwärme ULM Gmbh	Indirect evidence	Ulm, GermanyHQ checked Sep 19, 2026	51-200	23 contacts →
	Indirect evidence “Die Fernwärme Ulm GmbH (FUG) ist mit 200 Mitarbeitern der Fernwärmeversorger der Stadt Ulm.” Source: RevenueBase Database · checked Sep 19, 2026
25	Stadtwerke Weißwasser Gmbh	Indirect evidence	Weißwasser/o.l., GermanyHQ checked Sep 19, 2026	51-200	21 contacts →
	Indirect evidence “Die Stadtwerke Weißwasser GmbH ist ein regionales Energieversorgungsunternehmen für die Medien Strom, Gas & Fernwärme sowie für energienahe Dienstleistungen.” 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: district heating system companies. 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 district heating system companies.
Partial evidence: Its own public description names part of district heating system companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name district heating system companies. 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 409 district heating system companies based in Germany

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District heating system companies based in Germany at a glance

As of Sep 19, 2026

43.2%Verified-email coverage

16.3Average contacts per company

1-10Median size (employees)

3.9%Largest-city concentration · Berlin

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

205

11-50

103

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 409 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 district heating system companies, 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 “district heating system companies”. 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 district heating system companies), 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 district heating system companies, 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, 2,873 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 district heating system companies, 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 district heating system companies are there based in Germany?

RevenueBase identified 409 district heating system companies 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?

Vaillant Group, headquartered in Remscheid, tops this list with the largest team on record.

Which city has the most district heating system companies?

Berlin leads with 16 headquartered companies, followed by Hamburg (9) and Munchen (5).

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 2,873 verified decision-maker contacts tracked across these 409 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.