Company lists · Data refreshed September 2026

Top 25 District heating system companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 2,111 companies tracked

RevenueBase identified 2,111 district heating system companies worldwide as of September 2026 and tracks 30,053 professional contacts across them, including 10,370 with verified work emails. Germany is the largest market and Berlin the largest hub.

This list covers district heating system companies worldwide, 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. Country and city lists for district heating system companies follow the table.

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

2,111Companies

30,053Contacts tracked

10,370Verified emails

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The 25 largest district heating system companies worldwide

Ranked by team size

Top 25 of 2,111 district heating system companies worldwide, 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	BAXI	Partial evidence	Warwick, United KingdomHQ checked Sep 19, 2026	1,001-5,000	850 contacts →
	Partial evidence “We're leading the energy transition to zero carbon, by offering complete residential and commercial heating and hot water solutions.” Source: RevenueBase Database · checked Sep 19, 2026
3	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
4	Vital Energi Utilities Limited	Strong evidence	Blackburn, United KingdomHQ checked Sep 19, 2026	501-1,000	709 contacts →
	Strong evidence “Our 30+ years’ experience have involved us in the creation of major UK district heating networks in areas such as Sheffield, Nottingham and London.” Source: RevenueBase Database · checked Sep 19, 2026
5	Stockholm Exergi	Indirect evidence	Stockholm, SwedenHQ checked Sep 19, 2026	501-1,000	708 contacts →
	Indirect evidence “We are Stockholm’s energy company.” Source: RevenueBase Database · checked Sep 19, 2026
6	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
7	Logstor District Heating Solutions	Partial evidence	DenmarkHQ checked Sep 19, 2026	1,001-5,000	425 contacts →
	Partial evidence “With more than 50 years of research, development and experience, we have become the leading manufacturer of pre-insulated pipe systems.” Source: RevenueBase Database · checked Sep 19, 2026
8	Ferroli Group	Partial evidence	San Bonifacio, ItalyHQ checked Sep 19, 2026	1,001-5,000	418 contacts →
	Partial evidence “Comfort, designed around you – Since 1955, Ferroli has been a trusted name in HVAC, delivering innovative solutions for heating, cooling and hot water that combine comfort, energy…” Source: RevenueBase Database · checked Sep 19, 2026
9	Remeha	Indirect evidence	Apeldoorn, NetherlandsHQ checked Sep 19, 2026	201-500	388 contacts →
	Indirect evidence “Remeha, the comfort innovators Remeha ontwikkelt al sinds 1935 voortdurend innovatieve en energiezuinige producten voor warmte en warm water, zowel voor woningen als utiliteit.” Source: RevenueBase Database · checked Sep 19, 2026
10	Kredsløb	Indirect evidence	Brabrand, DenmarkHQ checked Sep 19, 2026	501-1,000	337 contacts →
	Indirect evidence “Kredsløb is an utility company with around 500 employees who work with contributing to the green transition and supporting our customers and partners in doing the same every day.” Source: RevenueBase Database · checked Sep 19, 2026
11	Rinnai Australia	Indirect evidence	Braeside, AustraliaHQ checked Sep 19, 2026	201-500	294 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
12	Vicinity Energy	Strong evidence	Boston, MA, United StatesHQ checked Sep 19, 2026	501-1,000	286 contacts →
	Strong evidence “Vicinity Energy is a leading district energy company that owns and operates the largest portfolio of district energy systems nationwide, providing steam, hot water, and chilled…” Source: RevenueBase Database · checked Sep 19, 2026
13	Sofinther	Indirect evidence	Bouguenais, FranceHQ checked Sep 19, 2026	201-500	285 contacts →
	Indirect evidence “SOFINTHER propose la meilleure offre en chauffage collectif aux professionnels du génie climatique.” Source: RevenueBase Database · checked Sep 19, 2026
14	CPCU	Indirect evidence	Paris, FranceHQ checked Sep 19, 2026	501-1,000	282 contacts →
	Indirect evidence “Le plus grand réseau de chaleur de France Depuis 1927, nous produisons et acheminons de la chaleur pour le chauffage et l’eau chaude en métropole parisienne.” Source: RevenueBase Database · checked Sep 19, 2026
15	Fjernvarme FYN A S	Indirect evidence	Odense C, DenmarkHQ checked Sep 19, 2026	201-500	276 contacts →
	Indirect evidence “Fjernvarmeforsyningen er en nonprofit virksomhed, hvor fjernvarmeprisen er omkostningsbestemt, og økonomisk følger princippet "hvile i sig selv".” Source: RevenueBase Database · checked Sep 19, 2026
16	Ennatuurlijk B.V	Indirect evidence	Eindhoven, NetherlandsHQ checked Sep 19, 2026	201-500	268 contacts →
	Indirect evidence “Ennatuurlijk koppelt lokale producenten en ontvangers van duurzame warmte en koude aan elkaar.” Source: RevenueBase Database · checked Sep 19, 2026
17	Mimsan Grup	Indirect evidence	Malatya, TürkiyeHQ checked Sep 19, 2026	501-1,000	215 contacts →
	Indirect evidence “Mimsan Grup; Yakma ve Enerji Sistemleri Üreten 41 Yıllık Bir Deneyime Sahip Endüstri Firmasıdır.” Source: RevenueBase Database · checked Sep 19, 2026
18	Halmstads Energi OCH Miljö AB	Indirect evidence	Halmstad, SwedenHQ checked Sep 19, 2026	201-500	191 contacts →
	Indirect evidence “The area's leading business, in relation to energy, environment and climate.” Source: RevenueBase Database · checked Sep 19, 2026
19	Bonarius Bedrijven	Indirect evidence	Zwanenburg, NetherlandsHQ checked Sep 19, 2026	201-500	186 contacts →
	Indirect evidence “Bonarius Bedrijven De naam Bonarius was lange tijd synoniem voor de aanleg en het onderhoud van cv-installaties.” Source: RevenueBase Database · checked Sep 19, 2026
20	Vaillant UK	Partial evidence	Belper, United KingdomHQ checked Sep 19, 2026	501-1,000	179 contacts →
	Partial evidence “What does it take to deliver confidence at every stage of the heating journey?” Source: RevenueBase Database · checked Sep 19, 2026
21	Enwave Energy Corporation	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 19, 2026	51-200	166 contacts →
	Indirect evidence “Enwave Energy Corporation is a fully integrated, sustainable energy services provider with operations in Toronto, Windsor, London, Markham, and Charlottetown.” Source: RevenueBase Database · checked Sep 19, 2026
22	Cordia	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 19, 2026	201-500	161 contacts →
	Indirect evidence “Cordia is a sustainable energy solutions provider.” Source: RevenueBase Database · checked Sep 19, 2026
23	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
24	Switch2 Energy Limited	Indirect evidence	Shipley, United KingdomHQ checked Sep 19, 2026	201-500	140 contacts →
	Indirect evidence “Switch2 is the UK’s most experienced and capable provider of end-to-end solutions for residential heat networks.” Source: RevenueBase Database · checked Sep 19, 2026
25	Hemiko	Indirect evidence	Carlisle, United KingdomHQ checked Sep 19, 2026	51-200	139 contacts →
	Indirect evidence “Together to Zero.” 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 2,111 district heating system companies worldwide

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District heating system companies worldwide at a glance

As of Sep 19, 2026

34.5%Verified-email coverage

14.2Average contacts per company

1-10Median size (employees)

0.8%Largest-city concentration · Berlin

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,032

11-50

667

51-200

211

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for district heating system companies are linked below.
What qualifies: Companies worldwide 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.
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, 10,370 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.

District heating system companies by location

14 lists · largest first

Every District heating system 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 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 worldwide?

RevenueBase identified 2,111 district heating system companies worldwide 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 country has the most district heating system companies?

Germany leads with 409 companies, followed by the United Kingdom (170) and France (135). Every district heating system companies list by country and city is linked on this page.

Which city has the most district heating system companies?

Berlin leads with 16 headquartered companies, followed by London (16) and Paris (11).

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 10,370 verified decision-maker contacts tracked across these 2,111 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.