Company lists · Data refreshed October 2026

Top 25 Closed loop geothermal system manufacturers worldwide

RevenueBase identified 669 company matches for closed loop geothermal system manufacturers worldwide as of October 2026 and tracks 4,446 professional contacts across them, including 1,611 with verified work emails. The United States is the largest market and Calgary the largest hub.

This list covers company matches for closed loop geothermal system manufacturers worldwide, 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 9, 2026. Country and city lists for closed loop geothermal system manufacturers follow the table.

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 9, 2026 How this list was built
669Companies
4,446Contacts tracked
1,611Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest closed loop geothermal system manufacturers worldwide

Ranked by team size
Top 25 of 669 company matches for closed loop geothermal system manufacturers worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 9, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchFort Wayne, IN, United StatesHQ recorded Oct 9, 2026201-500225 contacts →

Exact match

“WaterFurnace International, Inc.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
2Exact matchOklahoma City, OK, United StatesHQ recorded Oct 9, 2026501-1,000186 contacts →

Exact match

“ClimateMaster’s role as a domestic energy and geothermal heating and cooling leader extends back to the late 1950s when the company was first founded in Florida.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3Exact matchVoorburg, NetherlandsHQ recorded Oct 9, 202651-200149 contacts →

Exact match

“Eteck levert duurzame energie in de vorm van koude en warmte.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4Exact matchMount Kisco, NY, United StatesHQ recorded Oct 9, 202651-200130 contacts →

Exact match

“Dandelion Energy is the nation’s leading residential geothermal provider, on a mission to make the world’s most efficient heating and cooling technology accessible to everyone.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
5Exact matchLjungby, SwedenHQ recorded Oct 9, 2026201-500119 contacts →

Exact match

“CTC är en av Europas ledande tillverkare av värmeprodukter.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
6Exact matchAthens, GreeceHQ recorded Oct 9, 2026201-500106 contacts →

Exact match

“SYCHEM S.A.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7Exact matchArmonk, NY, United StatesHQ recorded Oct 9, 202651-200103 contacts →

Exact match

“Brightcore Energy is a leading renewable energy solutions provider serving commercial, institutional, and government clients.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8Exact matchGreenville, IL, United StatesHQ recorded Oct 9, 202651-20076 contacts →

Exact match

“Enertech Global is a leading manufacturer and visionary in the geothermal heating and cooling industry.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
9Exact matchCopenhagen, DenmarkHQ recorded Oct 9, 202651-20064 contacts →

Exact match

“Energy Machines is a leading provider of integrated energy systems that decarbonize heating and cooling while reducing operating costs for real estate owners, municipalities, and…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
10Exact matchAncaster, ON, CanadaHQ recorded Oct 9, 202651-20053 contacts →

Exact match

“For all business inquiries, contact the Geosource team at info@geosourceenergy.com- Devoted to the pursuit of innovation and excellence as a leading geoexchange specialist, we are…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11Exact matchNew Brighton, MN, United StatesHQ recorded Oct 9, 202611-5052 contacts →

Exact match

“Darcy Solutions is on a mission to put Geothermal Everywhere.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12Exact matchLaurel, MD, United StatesHQ recorded Oct 9, 202651-20052 contacts →

Exact match

“We at Allied Well Drilling are a full service commercial and residential gethermal heating/cooling system installer, specializing in vertically drilled closed loop systems.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13Exact matchToronto, ON, CanadaHQ recorded Oct 9, 202651-20043 contacts →

Exact match

“Diverso Energy is North America’s first fully vertically integrated geothermal utility company, helping developers, building owners, and investors deliver low-carbon heating and…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14Exact matchNewton, MA, United StatesHQ recorded Oct 9, 202651-20040 contacts →

Exact match

“Forge makes home comfort simple and sustainable with energy-efficient heat pump installations.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15Exact matchEspoo, FinlandHQ recorded Oct 9, 202611-5038 contacts →

Exact match

“Tarjoamme maalämpöä palveluna yrityksille ja taloyhtiöille.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16Exact matchPalo Alto, CA, United StatesHQ recorded Oct 9, 202611-5033 contacts →

Exact match

“XGS Energy is a geothermal energy company founded and headquartered in Palo Alto, CA.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17Exact matchBrämhult, SwedenHQ recorded Oct 9, 202651-20032 contacts →

Exact match

“MuoviTech is the European leader in installation products for geothermal energy.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18Exact matchAscheberg, GermanyHQ recorded Oct 9, 202651-20030 contacts →

Exact match

“Die Daldrup & Söhne AG ist Spezialist für Bohrtechnik und die Erschließung geologischer Ressourcen in Deutschland mit Sitz in Ascheberg, Nordrhein-Westfalen.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19Exact matchRochester, NY, United StatesHQ recorded Oct 9, 202651-20029 contacts →

Exact match

“John Betlem started the company in 1941, and John Betlem Heating & Cooling, Inc.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20Exact matchGrand Rapids, MI, United StatesHQ recorded Oct 9, 202611-5028 contacts →

Exact match

“Geothermal Systems are becoming a critical component in the effort to make buildings more environmentally friendly.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21Exact matchHameln, GermanyHQ recorded Oct 9, 202651-20027 contacts →

Exact match

“Seit über 55 Jahren arbeiten wir an intelligenten und maßgeschneiderten Lösungen für unsere Kunden, die optimal die Kundenbedürfnisse erfüllen.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22Exact matchAustin, TX, United StatesHQ recorded Oct 9, 202611-5027 contacts →

Exact match

“Our mission is to transform the heating & cooling of buildings, using geothermal energy to radically reduce costs for people and the environment.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23Exact matchBurlington, KY, United StatesHQ recorded Oct 9, 202651-20027 contacts →

Exact match

“Arronco Comfort Air, Inc.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24Exact matchKelowna, BC, CanadaHQ recorded Oct 9, 202611-5026 contacts →

Exact match

“GeoTility has been designing, installing, and servicing heating and cooling systems for more than 30 years.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25Exact matchCopenhagen, DenmarkHQ recorded Oct 9, 202611-5026 contacts →

Exact match

“Green Therma develops next-generation geothermal solutions for district heating and industrial applications, delivering reliable, renewable heat from deep beneath the Earth's…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase

Showing 25 of 669 closed loop geothermal system manufacturers worldwide

See the full list, filter by size, metro and specialty, and access 1,611 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Closed loop geothermal system manufacturers worldwide at a glance

As of Oct 9, 2026
36.2%Verified-email coverage
6.6Average contacts per company
1-10Median size (employees)
1.2%Largest-city concentration · Calgary
Oct 9, 2026Page data refreshed

Companies by employee count

1-10
344
11-50
265
51-200
48
201-500
7
501-1,000
1

Email recency is reported on each country list linked below.

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.
Coverage
Every country. Country and city lists for closed loop geothermal system manufacturers are linked below.
What qualifies
Company records worldwide whose business descriptions match “closed loop geothermal system manufacturers” 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. 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 1,611 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 9, 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.

Closed loop geothermal system manufacturers by location

6 lists · largest first

Every Closed loop geothermal system manufacturers 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 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 “closed loop geothermal system manufacturers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many closed loop geothermal system manufacturers are there worldwide?

RevenueBase identified 669 company matches for closed loop geothermal system manufacturers worldwide 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?

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

Which country has the most closed loop geothermal system manufacturers?

The United States leads with 158 companies, followed by Canada (48) and France (46). Every closed loop geothermal system manufacturers list by country and city is linked on this page.

Which city has the most closed loop geothermal system manufacturers?

Calgary leads with 8 company records, followed by Toronto (6) and Oklahoma City (4).

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 1,611 professional contacts with verified work emails tracked across these 669 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 9, 2026.

Ready to reach these companies? Verified emails and direct dials for all 669 closed loop geothermal system manufacturers worldwide. Start with a free account, no credit card.

Download this list →

Related lists

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.