Company lists · Data refreshed September 2026
Top 25 Heat recovery system companies based in Germany
RevenueBase identified 82 heat recovery system companies headquartered in Germany as of September 2026 and tracks 2,650 professional contacts across them, including 466 with verified work emails. Bochum is the largest hub.
This list covers heat recovery 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 20, 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.
The 25 largest heat recovery system companies based in Germany
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 120 contacts → | ||||
Indirect evidence “Since we at APROVIS have been developing solutions that make energy more efficient, sustainable and reliable.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 112 contacts → | ||||
Partial evidence “BRÖTJE efficient heating system technology.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 72 contacts → | ||||
Indirect evidence “Seit über vier Jahrzehnten setzen Kunden auf innovative Energiespartechnik aus dem Hause ONI.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 47 contacts → | ||||
Strong evidence “We are a resourceful company engaged in the production and sales of energy recovery and humidity control products for ventilation systems for 40 years.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 45 contacts → | ||||
Indirect evidence “SOLVE TOMORROW'S CHALLENGES TODAY At Güntner, we combine maximum precision in everyday life with a vision for the future in order to provide our partners with the best possible…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 41 contacts → | ||||
Indirect evidence “Rosink-Werkstätten GmbH - weltweit erfolgreich Rosink-Werkstätten entwickelt und produziert seit 1980 Wärmetauscher und Wärmerückgewinnungsanlagen für den weltweiten Einsatz in…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 34 contacts → | ||||
Strong evidence “Waste heat recovery systems for converting industrial waste heat into steam and other forms of energy are at the heart of our portfolio.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 34 contacts → | ||||
Partial evidence “We are the world’s leading manufacturer of pressure vessels and heat exchangers.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 19 contacts → | ||||
Partial evidence “We are a young technology company that develops, builds and sells innovative high-temperature heat pumps for industry.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 18 contacts → | ||||
Indirect evidence “Wir sind Ihr zuverlässiger Komplettanbieter für Kälte, Lüftungs, Kühl- und Heizlösungen in Gewerbe und Industrie.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 17 contacts → | ||||
Partial evidence “INTEC Engineering GmbH, founded in 1995, is a leading global supplier of industrial process heat technologies based in Bruchsal, southern Germany.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 13 contacts → | ||||
Indirect evidence “Danfoss BOCK® is one of the world's technology and innovation leaders in the development of environmentally friendly, economical solutions in the field of refrigeration and air…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 13 contacts → | ||||
Indirect evidence “Kelvion Thermal Solutions is your global partner for improved process efficiency.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 11 contacts → | ||||
Indirect evidence “Die Raab-Gruppe, mit den Marken Raab, Kutzner + Weber und NET, ist einer der führenden Anbieter für Abgastechnik für Wärmeerzeuger – von der Zuluft über die Feuerstätte…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 11 contacts → | ||||
Indirect evidence “Refolution ist das Ingenieurbüro für nachhaltige Industriekälte- und Wärmepumpentechnik.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 10 contacts → | ||||
Indirect evidence “Entwickler und Herstelle von hocheffizienter Wärmerückgewinnungsanlagen” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 10 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 10 contacts → | ||||
Partial evidence “e-flox GmbH specializes in the combustion of gases which are difficult for thermal treatment in conventional burner systems.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 10 contacts → | ||||
Indirect evidence “Heating, cooling and ventilation The Jaga “convector” has never been an ordinary radiator and now evolves into a climate cooler.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 7 contacts → | ||||
Indirect evidence “Abwasserwärmerückgewinnung – Wir treiben die Energieeffizienz von Wohngebäuden nachhaltig und wirtschaftlich voran.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 7 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 6 contacts → | ||||
Indirect evidence “ALL COMPETENCIES UNDER ONE ROOF-from order acceptance & project planning to construction to in-house production- Penke, Reineward & Co.” Source: RevenueBase Database · checked Sep 20, 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: heat recovery 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 heat recovery system companies.
- Partial evidence
- Its own public description names part of heat recovery system companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name heat recovery 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 82 heat recovery system companies based in Germany
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Heat recovery system companies based in Germany at a glance
As of Sep 20, 2026Companies by employee count
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 82 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 heat recovery 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 “heat recovery 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 heat recovery 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 heat recovery 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, 466 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 20, 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 heat recovery 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 heat recovery system companies are there based in Germany?
RevenueBase identified 82 heat recovery 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?
Aprovis Energy Systems Gmbh, headquartered in Weidenbach, tops this list with the largest team on record.
Which city has the most heat recovery system companies?
Bochum leads with 3 headquartered companies, followed by Berlin (2) and Dortmund (2).
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 466 verified decision-maker contacts tracked across these 82 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 20, 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.
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