Company lists · Data refreshed September 2026
Top 25 District heating system operators worldwide
RevenueBase identified 994 district heating system operators worldwide as of September 2026 and tracks 18,547 professional contacts across them, including 6,841 with verified work emails. Germany is the largest market and London the largest hub.
This list covers district heating system operators 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 operators 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.
The 25 largest district heating system operators worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 935 contacts → | ||||
Indirect evidence “A major player in the energy transition and leader in home services, PROXISERVE provides its customers with innovative solutions enabling them to reduce their energy consumption…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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, 2026Thanks. The Data Team will review it. | |||||
| 3 | 779 contacts → | ||||
Indirect evidence “Podnikání innogy se soustředí na dodávky zemního plynu, elektřiny a tepla zákazníkům, kombinovanou výrobu tepla a elektřiny v teplárenských provozech a řešení pro čistou mobilitu.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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, 2026Thanks. The Data Team will review it. | |||||
| 5 | 708 contacts → | ||||
Indirect evidence “We are Stockholm’s energy company.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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, 2026Thanks. The Data Team will review it. | |||||
| 7 | 416 contacts → | ||||
Indirect evidence “Verdo Holding A/S er en forbrugerejet energikoncern med hovedsæde i Randers, der består af et holdingselskab samt datterselskaber inden for vand, varme og elproduktion.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 356 contacts → | ||||
Indirect evidence “EVN Bulgaria is part of the Austrian EVN Group.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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, 2026Thanks. The Data Team will review it. | |||||
| 13 | 268 contacts → | ||||
Indirect evidence “Ennatuurlijk koppelt lokale producenten en ontvangers van duurzame warmte en koude aan elkaar.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 244 contacts → | ||||
Indirect evidence “Gestalten Sie mit uns die Energiezukunft Thüringens!” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 191 contacts → | ||||
Indirect evidence “The area's leading business, in relation to energy, environment and climate.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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, 2026Thanks. The Data Team will review it. | |||||
| 17 | 184 contacts → | ||||
Indirect evidence “Seit mehr als 170 Jahren versorgen die Stadtwerke Bochum die Bochumer Bürger mit Strom, Gas, Wasser und Fernwärme.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 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, 2026Thanks. The Data Team will review it. | |||||
| 19 | 150 contacts → | ||||
Indirect evidence “La Direction Régionale Ile-de-France est composée de trois pôles d’activité :"Réseaux de Chaleur et de Froid", “Habitat et Collectivités” et “Tertiaire et Industrie”.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 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, 2026Thanks. The Data Team will review it. | |||||
| 21 | 139 contacts → | ||||
Indirect evidence “Together to Zero.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 137 contacts → | ||||
Indirect evidence “TREFOR er en del af EWII Koncernen og består af infrastrukturselskaberne TREFOR Vand, TREFOR Varme, TREFOR El-net samt TREFOR El-net Øst.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 127 contacts → | ||||
Partial evidence “Fraîcheur de Paris est la société dédiée au service public de production, de transport, de stockage et de distribution d’énergie frigorifique.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 126 contacts → | ||||
Indirect evidence “Trollhättan Energi är ett företag med 100-åriga anor, och idag ansvarar vi för kommunens elnät, fjärrvärmenät, vatten- och avloppsnät och stadsnät.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 125 contacts → | ||||
Indirect evidence “We are Bring Energy.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
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 operators. 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 operators.
- Partial evidence
- Its own public description names part of district heating system operators, 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 operators. 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 994 district heating system operators worldwide
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District heating system operators worldwide at a glance
As of Sep 19, 2026Companies by employee count
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 operators, 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 operators are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “district heating system operators”. 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 operators), 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 operators, 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, 6,841 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 operators by location
9 lists · largest firstEvery District heating system operators list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- District heating system operators based in Germany204
- District heating system operators based in Denmark83
- District heating system operators based in the United Kingdom69
- District heating system operators based in Switzerland62
- District heating system operators based in Italy54
- District heating system operators based in France52
- District heating system operators based in Sweden49
- District heating system operators based in the Netherlands43
- District heating system operators based in Finland31
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 operators, 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 operators are there worldwide?
RevenueBase identified 994 district heating system operators 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?
Proxiserve, headquartered in Levallois-Perret, tops this list with the largest team on record.
Which country has the most district heating system operators?
Germany leads with 204 companies, followed by Denmark (83) and the United Kingdom (69). Every district heating system operators list by country and city is linked on this page.
Which city has the most district heating system operators?
London leads with 10 headquartered companies, followed by Paris (8) and Madrid (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 6,841 verified decision-maker contacts tracked across these 994 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.