Company lists · Data refreshed October 2026

Top 25 Geothermal contractors based in Belgium

Name: Geothermal contractors based in Belgium
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 13, 2026 283 companies tracked

RevenueBase identified 283 company matches for geothermal contractors associated with Belgium as of October 2026 and tracks 1,266 professional contacts across them, including 419 with verified work emails. Antwerp is the largest hub.

This list covers company matches for geothermal contractors associated with Belgium, 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 13, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 13, 2026 How this list was built

283Companies

1,266Contacts tracked

419Verified emails

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The 25 largest geothermal contractors based in Belgium

Ranked by team size

Top 25 of 283 company matches for geothermal contractors based in Belgium, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 13, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Reno Energy	Exact match	Liège (angleur), BelgiumHQ recorded Oct 13, 2026	51-200	103 contacts →
	Exact match “Reno Energy est une entreprise spécialisée dans le secteur de la rénovation énergétique mais aussi dans la nouvelle construction.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
2	Sanitechniek	Exact match	Sint-katelijne-waver, BelgiumHQ recorded Oct 13, 2026	11-50	37 contacts →
	Exact match “Sanitechniek is dé specialist in professionele HVAC-en sanitaire installaties.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
3	SIX Izegem	Exact match	Izegem, BelgiumHQ recorded Oct 13, 2026	201-500	36 contacts →
	Exact match “SIX staat voor kwaliteit en standvastigheid, zoveel is zeker.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
4	Goessens	Exact match	Hannut, BelgiumHQ recorded Oct 13, 2026	51-200	28 contacts →
	Exact match “Goessens est une société spécialisée dans l'installation de systèmes de chauffage, de ventilation et de climatisation.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
5	AGT NV	Exact match	Kontich, BelgiumHQ recorded Oct 13, 2026	11-50	27 contacts →
	Exact match “AGT-Advanced Groundwater Techniques specializes in applied groundwater techniques.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
6	Group VHC	Exact match	Overijse, BelgiumHQ recorded Oct 13, 2026	51-200	24 contacts →
	Exact match “Group VHC zorgt al meer dan 25 jaar voor slimme oplossingen in verwarming, koeling, ventilatie en zonne energie.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
7	Iftech NV	Exact match	Koersel, BelgiumHQ recorded Oct 13, 2026	11-50	22 contacts →
	Exact match “IFTech speelt een voortrekkersrol in seizoensmatige energieopslag.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
8	Deltha	Exact match	Diepenbeek, BelgiumHQ recorded Oct 13, 2026	11-50	21 contacts →
	Exact match “Deltha ontwerpt en bouwt uw gebouwinstallaties, verwarming, koeling, ventilatie, elektriciteit en sanitair.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
9	Conduterra NV	Exact match	Antwerp, BelgiumHQ recorded Oct 13, 2026	11-50	20 contacts →
	Exact match “Conduterra.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
10	Smeyers	Exact match	Zandhoven, BelgiumHQ recorded Oct 13, 2026	11-50	18 contacts →
	Exact match “Smeyers is een gespecialiseerd onderaannemingsbedrijf actief in de bouwsector.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
11	Stiebel Eltron Belgium	Exact match	Groot-bijgaarden, BelgiumHQ recorded Oct 13, 2026	11-50	17 contacts →
	Exact match “Stiebel Eltron is een internationale groep en behoort tot de wereldmarkt- en technologieleiders op het gebied van bouwdiensten en hernieuwbare energie.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
12	Gebo Bvba	Exact match	Dessel, BelgiumHQ recorded Oct 13, 2026	11-50	15 contacts →
	Exact match “GEBO is a drilling company specialised in geothermal drilling.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
13	Deconinck-Wanson	Exact match	Gavere, BelgiumHQ recorded Oct 13, 2026	11-50	14 contacts →
	Exact match “Deconinck-Wanson is uw specialist op het vlak van industriële thermische installaties.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
14	Geotherma	Exact match	Hoegaarden, BelgiumHQ recorded Oct 13, 2026	11-50	13 contacts →
	Exact match “GeoTherma gelooft dat alle thermische energienoden in gebouwen en woningen moeten geëlektrificeerd worden met behulp van warmtepompen.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
15	Thermoco Equans	Exact match	Antwerp, BelgiumHQ recorded Oct 13, 2026	51-200	13 contacts →
	Exact match “Thermoco is uw uniek aanspreekpunt voor al uw projecten in HVAC, centrale verwarming, regeltechniek, ventilatie, sanitair, koeling en elektriciteit.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
16	Callens-Vyncke	Exact match	Waregem, BelgiumHQ recorded Oct 13, 2026	11-50	13 contacts →
	Exact match “Callens-Vyncke provides the industry with smart solutions to generate heat and power.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
17	Alfasun	Exact match	Ninove, BelgiumHQ recorded Oct 13, 2026	11-50	13 contacts →
	Exact match “nergie zonder zorgen Ga je bouwen?” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
18	Hello Airco	Exact match	Sint-niklaas, BelgiumHQ recorded Oct 13, 2026	11-50	10 contacts →
	Exact match “Hello Airco installeert en onderhoudt airco's en warmtepompen bij bedrijven en particulieren.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
19	ERVAC	Exact match	BelgiumHQ recorded Oct 13, 2026	11-50	10 contacts →
	Exact match “Forte d’une équipe de plus de 20 personnes dynamiques et compétentes, la société ERVAC est à votre service dans la réalisation de vos projets électriques et de régulation dans les…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
20	Boogaerts	Exact match	Wavre, BelgiumHQ recorded Oct 13, 2026	1-10	10 contacts →
	Exact match “Boogaerts Hot Air Heating: Our mission : to offer solutions air heating efficient, economical and durable.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
21	Conforty	Exact match	Noville-les-bois, BelgiumHQ recorded Oct 13, 2026	11-50	9 contacts →
	Exact match “The CONFORTY company specializes in the construction of heating, ventilation and sanitary installations.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
22	Ct-O	Exact match	Oostkamp, BelgiumHQ recorded Oct 13, 2026	11-50	9 contacts →
	Exact match “CT-O biedt kwaliteitsvolle installaties in sanitair, verwarming, ventilatie & duurzame alternatieve warmtebronnen.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
23	Klimaplan	Exact match	Kontich, BelgiumHQ recorded Oct 13, 2026	11-50	9 contacts →
	Exact match “KLIMAPLAN is a construction company based out of 83 Blauwesteenstraat, Kontich, Belgium.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
24	Cevek NV	Exact match	Overpelt, BelgiumHQ recorded Oct 13, 2026	11-50	8 contacts →
	Exact match “Installatiepartner en Limburgs vakmanschap sinds 1972.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
25	Deweer Sanitair & Hvac	Exact match	Anzegem, BelgiumHQ recorded Oct 13, 2026	11-50	8 contacts →
	Exact match “DEWEER SANITAIR is a construction company based out of 6 Dragonderdreef, Anzegem, Belgium.” Recorded in the RevenueBase company graph · Oct 13, 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 “geothermal 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 283 geothermal contractors based in Belgium

See the full list, filter by size, metro and specialty, and access 419 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal contractors based in Belgium at a glance

As of Oct 13, 2026

33.1%Verified-email coverage

4.5Average contacts per company

1-10Median size (employees)

3.2%Largest-city concentration · Antwerp

Oct 13, 2026Page data refreshed

Companies by employee count

1-10

186

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for Belgium, so it is reported there. Company counts and contact totals on this page are exact for Belgium, over 283 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 Belgium whose business descriptions match “geothermal 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 419 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 13, 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 “geothermal contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal contractors are there based in Belgium?

RevenueBase identified 283 company matches for geothermal contractors associated with Belgium 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?

Reno Energy tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most geothermal contractors?

Antwerp leads with 9 company records, followed by Arendonk (5) and Brussels (5).

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 419 professional contacts with verified work emails tracked across these 283 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 13, 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 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.