Company lists · Data refreshed October 2026
Top 25 Commercial geothermal retrofit contractors based in Germany
RevenueBase identified 130 company matches for commercial geothermal retrofit contractors associated with Germany as of October 2026 and tracks 402 professional contacts across them, including 119 with verified work emails. Berlin is the largest hub.
This list covers company matches for commercial geothermal retrofit contractors associated with Germany, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 10, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 commercial geothermal retrofit contractors based in Germany
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 16 contacts → | ||||
Exact match “Natelberg Gebäudetechnik GmbH is a computer networking company based out of 9 Schwarzmoorstraße, Rhauderfehn, Germany.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 2 | 14 contacts → | ||||
Exact match “Geothermie Neubrandenburg GmbH (GTN) is an internationally active consultancy and planning office of engineers and geoscientsits.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 3 | 13 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 4 | 11 contacts → | ||||
Exact match “Energieeffiziente Warmwasser-Systeme” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 5 | 10 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 6 | 9 contacts → | ||||
Exact match “Heizung - Klima - Sanitär” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 7 | 8 contacts → | ||||
Exact match “Maier Heiztechnik GmbH – Gebäudetechnik mit Verantwortung.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 8 | 6 contacts → | ||||
Exact match “Geowell Erdwärme GmbH & Co.KG is a construction company based out of 5 Neckarstraße, Marl, Germany.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 9 | 6 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 10 | 6 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 11 | 6 contacts → | ||||
Exact match “Metternich Haustechnik is a renewables & environment company based out of Germany.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 12 | 5 contacts → | ||||
Exact match “Erfahrung und Innovation – auf diese Werte setzt das 1969 gegründete Klimatechnikunternehmen KlimaShop!” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 13 | 5 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 14 | 5 contacts → | ||||
Exact match “Seit über 50 Jahren verbaut die HEINRICH KRUMME Gesellschaft für Heizungs, Klima- und Sanitärtechnik mbH energieeffiziente Haustechnik auf Großbaustellen im gesamten Bundesgebiet.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 15 | 5 contacts → | ||||
Exact match “Am 01.05.1997 wurde das Unternehmen Umwelt- und Energietechnik von Mike Lorenz gegründet.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 16 | 4 contacts → | ||||
Exact match “Die GeoCollect GmbH ist ein Hersteller von Erdwärmekollektoren mit Sitz in Chemnitz.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 17 | 3 contacts → | ||||
Exact match “Locher Haustechnik GmbH is a company based out of Oberer Luß 3, 89155 Erbach, Germany.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 18 | 3 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 19 | 3 contacts → | ||||
Exact match “Georg Bergsteiner GmbH Planung Service Ausführung von haustechn Anlgen Heizung Klima Kälte Erneuerbare Energien:Wie Wärmepumpen: Solr; Pellet; usw; Sanitär” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 20 | 3 contacts → | ||||
Exact match “Wir sind Ihr Partner in Sachen Planung, Installation, Sanierung, Wartung und Management der Energietechnik in Ihrem Haus.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 21 | 2 contacts → | ||||
Exact match “Jahrelange Erfahrungen in der Planung und Ausführung von HLK Anlagen haben unsere Firma zu einem kompetenten Ansprechpartner in der Region geprägt.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 22 | 2 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 23 | 2 contacts → | ||||
Exact match “GeoAlto steht für nachhaltige Wärme und Kälte aus der Erde.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 24 | 2 contacts → | ||||
Exact match “In über 15 Jahren in den Bereichen Wärme- & Kältetechnik ist uns des Öfteren aufgefallen, dass Anlagen falsch projektiert, dimensioniert und verbaut worden sind und die Kunden…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
| 25 | 2 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “commercial geothermal retrofit contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 130 commercial geothermal retrofit contractors based in Germany
See the full list, filter by size, metro and specialty, and access 119 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Commercial geothermal retrofit contractors based in Germany at a glance
As of Oct 10, 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 130 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with Germany whose business descriptions match “commercial geothermal retrofit contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- 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 displayed company carries at least one verified work email. RevenueBase tracks 119 professional contacts with verified work emails across the full matched dataset. 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 October 10, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “commercial geothermal retrofit contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many commercial geothermal retrofit contractors are there based in Germany?
RevenueBase identified 130 company matches for commercial geothermal retrofit contractors associated with Germany as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Natelberg Gebäudetechnik Gmbh tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most commercial geothermal retrofit contractors?
Berlin leads with 5 company records, followed by Bad Marienberg (2) and Chemnitz (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 119 professional contacts with verified work emails tracked across these 130 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 10, 2026.
Ready to reach these companies? Verified emails and direct dials for all 130 commercial geothermal retrofit contractors based in Germany. Start with a free account, no credit card.
Download this list →Related lists
Commercial geothermal retrofit contractors by geography
- Commercial geothermal retrofit contractors based in Australia
- Commercial geothermal retrofit contractors based in Belgium
- Commercial geothermal retrofit contractors based in Canada
- Commercial geothermal retrofit contractors based in Finland
- Commercial geothermal retrofit contractors based in France
- Commercial geothermal retrofit contractors based in Italy
- Commercial geothermal retrofit contractors based in the Netherlands
- Commercial geothermal retrofit contractors based in Spain
- Commercial geothermal retrofit contractors based in Switzerland
- Commercial geothermal retrofit contractors based in the United Kingdom
- Commercial geothermal retrofit contractors based in the United States
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 SmartSearch, 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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Commercial geothermal retrofit contractors based in Australia
- Commercial geothermal retrofit contractors based in Belgium
- Commercial geothermal retrofit contractors based in Canada
- Commercial geothermal retrofit contractors based in Finland
- Commercial geothermal retrofit contractors based in France
- Commercial geothermal retrofit contractors based in Italy
Company intelligence · public preview
Top 25 commercial geothermal retrofit contractors based in Germany
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 130 matching company records for commercial geothermal retrofit contractors based in Germany, with 402 tracked contacts and 119 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 10, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 commercial geothermal retrofit contractors based in Germany
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Natelberg Gebäudetechnik Gmbhnatelberg.de HQ: Rhauderfehn, GermanyReported employees: 11-50 | Rhauderfehn, Germany | 11-50 | Exact match | 16 contacts → |
“Natelberg Gebäudetechnik GmbH is a computer networking company based out of 9 Schwarzmoorstraße, Rhauderfehn, Germany.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Geothermie Neubrandenburg Gmbhgtn-online.de HQ: Neubrandenburg, GermanyReported employees: 11-50 | Neubrandenburg, Germany | 11-50 | Exact match | 14 contacts → |
“Geothermie Neubrandenburg GmbH (GTN) is an internationally active consultancy and planning office of engineers and geoscientsits.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Wibau Haustechnik Gmbhwibau-haustechnik.de HQ: Schwerin, GermanyReported employees: 11-50 | Schwerin, Germany | 11-50 | Exact match | 13 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 4 | Sailer Gmbh Ehingensailergmbh.de HQ: Ehingen-donau, GermanyReported employees: 11-50 | Ehingen-donau, Germany | 11-50 | Exact match | 11 contacts → |
“Energieeffiziente Warmwasser-Systeme” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Erdwärme Grünwald Gmbherdwaerme-gruenwald.de HQ: Grünwald, GermanyReported employees: 11-50 | Grünwald, Germany | 11-50 | Exact match | 10 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 6 | H. Maurer Gmbh & Co. KGmaurer-schramberg.de HQ: Schramberg, GermanyReported employees: 51-200 | Schramberg, Germany | 51-200 | Exact match | 9 contacts → |
“Heizung - Klima - Sanitär” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Maier Heiztechnik Gmbhheizmaier.de HQ: Köngen, GermanyReported employees: 51-200 | Köngen, Germany | 51-200 | Exact match | 8 contacts → |
“Maier Heiztechnik GmbH – Gebäudetechnik mit Verantwortung.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Geowell Erdwärme Gmbh & Co.Kggeowell.de HQ: Marl, GermanyReported employees: 51-200 | Marl, Germany | 51-200 | Exact match | 6 contacts → |
“Geowell Erdwärme GmbH & Co.KG is a construction company based out of 5 Neckarstraße, Marl, Germany.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | ECO Mondia Green Technology Europe Gmbhecomondia.com HQ: Dortmund, GermanyReported employees: 51-200 | Dortmund, Germany | 51-200 | Exact match | 6 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 10 | Klima-Top Gmbhklimatop.info HQ: Memmingen, GermanyReported employees: 11-50 | Memmingen, Germany | 11-50 | Exact match | 6 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 | Metternich Haustechnikmetternich-haustechnik.de HQ: Windeck, GermanyReported employees: 11-50 | Windeck, Germany | 11-50 | Exact match | 6 contacts → |
“Metternich Haustechnik is a renewables & environment company based out of Germany.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Klimashop Gmbhklimashop.de HQ: Friedberg, GermanyReported employees: 11-50 | Friedberg, Germany | 11-50 | Exact match | 5 contacts → |
“Erfahrung und Innovation – auf diese Werte setzt das 1969 gegründete Klimatechnikunternehmen KlimaShop!” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Paul Müller Kälte-Klimatechnik Gmbhkaelte-mueller-gmbh.de HQ: Eisingen, GermanyReported employees: 1-10 | Eisingen, Germany | 1-10 | Exact match | 5 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 14 | Heinrich Krumme Gesellschaft FÜR Heizungs-, Klima- UND Sanitärtechnik MBH Brunsbüttelkrumme-brunsbuettel.de HQ: Brunsbüttel, GermanyReported employees: 51-200 | Brunsbüttel, Germany | 51-200 | Exact match | 5 contacts → |
“Seit über 50 Jahren verbaut die HEINRICH KRUMME Gesellschaft für Heizungs, Klima- und Sanitärtechnik mbH energieeffiziente Haustechnik auf Großbaustellen im gesamten Bundesgebiet.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Lorenz Energie Gmbhlorenzenergie.de HQ: Gründau, GermanyReported employees: 51-200 | Gründau, Germany | 51-200 | Exact match | 5 contacts → |
“Am 01.05.1997 wurde das Unternehmen Umwelt- und Energietechnik von Mike Lorenz gegründet.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Geocollect Gmbh - Erdwärmegeocollect.de HQ: Chemnitz, GermanyReported employees: 1-10 | Chemnitz, Germany | 1-10 | Exact match | 4 contacts → |
“Die GeoCollect GmbH ist ein Hersteller von Erdwärmekollektoren mit Sitz in Chemnitz.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Locher Haustechnik Gmbhlocher-haustechnik.de HQ: Erbach, GermanyReported employees: 11-50 | Erbach, Germany | 11-50 | Exact match | 3 contacts → |
“Locher Haustechnik GmbH is a company based out of Oberer Luß 3, 89155 Erbach, Germany.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Gauß Gmbhgauss-gmbh.de HQ: Altensteig, GermanyReported employees: 11-50 | Altensteig, Germany | 11-50 | Exact match | 3 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 19 | Georg Bergsteiner Gmbhbergsteiner.org HQ: Manching, GermanyReported employees: 11-50 | Manching, Germany | 11-50 | Exact match | 3 contacts → |
“Georg Bergsteiner GmbH Planung Service Ausführung von haustechn Anlgen Heizung Klima Kälte Erneuerbare Energien:Wie Wärmepumpen: Solr; Pellet; usw; Sanitär” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Me-Le Energietechnik Gmbhme-le.de HQ: Dessau, GermanyReported employees: 1-10 | Dessau, Germany | 1-10 | Exact match | 3 contacts → |
“Wir sind Ihr Partner in Sachen Planung, Installation, Sanierung, Wartung und Management der Energietechnik in Ihrem Haus.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Selz & CIE Gmbhselz.net HQ: Heidelberg, GermanyReported employees: 51-200 | Heidelberg, Germany | 51-200 | Exact match | 2 contacts → |
“Jahrelange Erfahrungen in der Planung und Ausführung von HLK Anlagen haben unsere Firma zu einem kompetenten Ansprechpartner in der Region geprägt.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Eki-Therm Gmbheki-therm.de HQ: Bestwig, GermanyReported employees: 11-50 | Bestwig, Germany | 11-50 | Exact match | 2 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 23 | Geoalto Gmbhgeoalto.de HQ: Rottenburg Am Neckar, GermanyReported employees: 1-10 | Rottenburg Am Neckar, Germany | 1-10 | Exact match | 2 contacts → |
“GeoAlto steht für nachhaltige Wärme und Kälte aus der Erde.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | M.K.E Wärme- & Kältetechnik Gmbhmke-wk.de HQ: Ludwigsburg, GermanyReported employees: 1-10 | Ludwigsburg, Germany | 1-10 | Exact match | 2 contacts → |
“In über 15 Jahren in den Bereichen Wärme- & Kältetechnik ist uns des Öfteren aufgefallen, dass Anlagen falsch projektiert, dimensioniert und verbaut worden sind und die Kunden…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Hugo Kalbe Gmbhkalbe.de HQ: Korbach, GermanyReported employees: 1-10 | Korbach, Germany | 1-10 | Exact match | 2 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 25 of 130 company matches
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Commercial geothermal retrofit contractors: dataset insights
October 10, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
122 records in the displayed employee bands.
8 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 130 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 10, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for commercial geothermal retrofit contractors?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many commercial geothermal retrofit contractors did RevenueBase find based in Germany?
The saved snapshot records 130 matching company records, 402 tracked contacts and 119 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 10, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Commercial geothermal retrofit contractors by geography
- Commercial geothermal retrofit contractors based in Australia
- Commercial geothermal retrofit contractors based in Belgium
- Commercial geothermal retrofit contractors based in Canada
- Commercial geothermal retrofit contractors based in Finland
- Commercial geothermal retrofit contractors based in France
- Commercial geothermal retrofit contractors based in Italy
- Commercial geothermal retrofit contractors based in the Netherlands
- Commercial geothermal retrofit contractors based in Spain
- Commercial geothermal retrofit contractors based in Switzerland
- Commercial geothermal retrofit contractors based in the United Kingdom
- Commercial geothermal retrofit contractors based in the United States
Cite this list
RevenueBase Data Team. Top 25 commercial geothermal retrofit contractors based in Germany. Snapshot: October 10, 2026. https://revenuebase.ai/companies/commercial-geothermal-retrofit-contractors/germany.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Commercial geothermal retrofit contractors based in Australia
- Commercial geothermal retrofit contractors based in Belgium
- Commercial geothermal retrofit contractors based in Canada
- Commercial geothermal retrofit contractors based in Finland
- Commercial geothermal retrofit contractors based in France
- Commercial geothermal retrofit contractors based in Italy
Company intelligence · public preview
Top 25 commercial geothermal retrofit contractors based in Germany
RevenueBase records 130 matching company records for commercial geothermal retrofit contractors based in Germany, with 402 tracked contacts and 119 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 10, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 commercial geothermal retrofit contractors based in Germany
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Natelberg Gebäudetechnik Gmbhnatelberg.de HQ: Rhauderfehn, GermanyReported employees: 11-50 | Rhauderfehn, Germany | 11-50 | Exact match | 16 contacts → |
“Natelberg Gebäudetechnik GmbH is a computer networking company based out of 9 Schwarzmoorstraße, Rhauderfehn, Germany.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Geothermie Neubrandenburg Gmbhgtn-online.de HQ: Neubrandenburg, GermanyReported employees: 11-50 | Neubrandenburg, Germany | 11-50 | Exact match | 14 contacts → |
“Geothermie Neubrandenburg GmbH (GTN) is an internationally active consultancy and planning office of engineers and geoscientsits.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Wibau Haustechnik Gmbhwibau-haustechnik.de HQ: Schwerin, GermanyReported employees: 11-50 | Schwerin, Germany | 11-50 | Exact match | 13 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 4 | Sailer Gmbh Ehingensailergmbh.de HQ: Ehingen-donau, GermanyReported employees: 11-50 | Ehingen-donau, Germany | 11-50 | Exact match | 11 contacts → |
“Energieeffiziente Warmwasser-Systeme” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Erdwärme Grünwald Gmbherdwaerme-gruenwald.de HQ: Grünwald, GermanyReported employees: 11-50 | Grünwald, Germany | 11-50 | Exact match | 10 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 6 | H. Maurer Gmbh & Co. KGmaurer-schramberg.de HQ: Schramberg, GermanyReported employees: 51-200 | Schramberg, Germany | 51-200 | Exact match | 9 contacts → |
“Heizung - Klima - Sanitär” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Maier Heiztechnik Gmbhheizmaier.de HQ: Köngen, GermanyReported employees: 51-200 | Köngen, Germany | 51-200 | Exact match | 8 contacts → |
“Maier Heiztechnik GmbH – Gebäudetechnik mit Verantwortung.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Geowell Erdwärme Gmbh & Co.Kggeowell.de HQ: Marl, GermanyReported employees: 51-200 | Marl, Germany | 51-200 | Exact match | 6 contacts → |
“Geowell Erdwärme GmbH & Co.KG is a construction company based out of 5 Neckarstraße, Marl, Germany.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | ECO Mondia Green Technology Europe Gmbhecomondia.com HQ: Dortmund, GermanyReported employees: 51-200 | Dortmund, Germany | 51-200 | Exact match | 6 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 10 | Klima-Top Gmbhklimatop.info HQ: Memmingen, GermanyReported employees: 11-50 | Memmingen, Germany | 11-50 | Exact match | 6 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 | Metternich Haustechnikmetternich-haustechnik.de HQ: Windeck, GermanyReported employees: 11-50 | Windeck, Germany | 11-50 | Exact match | 6 contacts → |
“Metternich Haustechnik is a renewables & environment company based out of Germany.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Klimashop Gmbhklimashop.de HQ: Friedberg, GermanyReported employees: 11-50 | Friedberg, Germany | 11-50 | Exact match | 5 contacts → |
“Erfahrung und Innovation – auf diese Werte setzt das 1969 gegründete Klimatechnikunternehmen KlimaShop!” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Paul Müller Kälte-Klimatechnik Gmbhkaelte-mueller-gmbh.de HQ: Eisingen, GermanyReported employees: 1-10 | Eisingen, Germany | 1-10 | Exact match | 5 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 14 | Heinrich Krumme Gesellschaft FÜR Heizungs-, Klima- UND Sanitärtechnik MBH Brunsbüttelkrumme-brunsbuettel.de HQ: Brunsbüttel, GermanyReported employees: 51-200 | Brunsbüttel, Germany | 51-200 | Exact match | 5 contacts → |
“Seit über 50 Jahren verbaut die HEINRICH KRUMME Gesellschaft für Heizungs, Klima- und Sanitärtechnik mbH energieeffiziente Haustechnik auf Großbaustellen im gesamten Bundesgebiet.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Lorenz Energie Gmbhlorenzenergie.de HQ: Gründau, GermanyReported employees: 51-200 | Gründau, Germany | 51-200 | Exact match | 5 contacts → |
“Am 01.05.1997 wurde das Unternehmen Umwelt- und Energietechnik von Mike Lorenz gegründet.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Geocollect Gmbh - Erdwärmegeocollect.de HQ: Chemnitz, GermanyReported employees: 1-10 | Chemnitz, Germany | 1-10 | Exact match | 4 contacts → |
“Die GeoCollect GmbH ist ein Hersteller von Erdwärmekollektoren mit Sitz in Chemnitz.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Locher Haustechnik Gmbhlocher-haustechnik.de HQ: Erbach, GermanyReported employees: 11-50 | Erbach, Germany | 11-50 | Exact match | 3 contacts → |
“Locher Haustechnik GmbH is a company based out of Oberer Luß 3, 89155 Erbach, Germany.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Gauß Gmbhgauss-gmbh.de HQ: Altensteig, GermanyReported employees: 11-50 | Altensteig, Germany | 11-50 | Exact match | 3 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 19 | Georg Bergsteiner Gmbhbergsteiner.org HQ: Manching, GermanyReported employees: 11-50 | Manching, Germany | 11-50 | Exact match | 3 contacts → |
“Georg Bergsteiner GmbH Planung Service Ausführung von haustechn Anlgen Heizung Klima Kälte Erneuerbare Energien:Wie Wärmepumpen: Solr; Pellet; usw; Sanitär” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Me-Le Energietechnik Gmbhme-le.de HQ: Dessau, GermanyReported employees: 1-10 | Dessau, Germany | 1-10 | Exact match | 3 contacts → |
“Wir sind Ihr Partner in Sachen Planung, Installation, Sanierung, Wartung und Management der Energietechnik in Ihrem Haus.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Selz & CIE Gmbhselz.net HQ: Heidelberg, GermanyReported employees: 51-200 | Heidelberg, Germany | 51-200 | Exact match | 2 contacts → |
“Jahrelange Erfahrungen in der Planung und Ausführung von HLK Anlagen haben unsere Firma zu einem kompetenten Ansprechpartner in der Region geprägt.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Eki-Therm Gmbheki-therm.de HQ: Bestwig, GermanyReported employees: 11-50 | Bestwig, Germany | 11-50 | Exact match | 2 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 23 | Geoalto Gmbhgeoalto.de HQ: Rottenburg Am Neckar, GermanyReported employees: 1-10 | Rottenburg Am Neckar, Germany | 1-10 | Exact match | 2 contacts → |
“GeoAlto steht für nachhaltige Wärme und Kälte aus der Erde.” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | M.K.E Wärme- & Kältetechnik Gmbhmke-wk.de HQ: Ludwigsburg, GermanyReported employees: 1-10 | Ludwigsburg, Germany | 1-10 | Exact match | 2 contacts → |
“In über 15 Jahren in den Bereichen Wärme- & Kältetechnik ist uns des Öfteren aufgefallen, dass Anlagen falsch projektiert, dimensioniert und verbaut worden sind und die Kunden…” Recorded description excerpt · October 10, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Hugo Kalbe Gmbhkalbe.de HQ: Korbach, GermanyReported employees: 1-10 | Korbach, Germany | 1-10 | Exact match | 2 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 25 of 130 company matches
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Commercial geothermal retrofit contractors: dataset insights
October 10, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
122 records in the displayed employee bands.
8 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 130 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 10, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for commercial geothermal retrofit contractors?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many commercial geothermal retrofit contractors did RevenueBase find based in Germany?
The saved snapshot records 130 matching company records, 402 tracked contacts and 119 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 10, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Commercial geothermal retrofit contractors by geography
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Cite this list
RevenueBase Data Team. Top 25 commercial geothermal retrofit contractors based in Germany. Snapshot: October 10, 2026. https://revenuebase.ai/companies/commercial-geothermal-retrofit-contractors/germany.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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