Company lists · Data refreshed October 2026

Top 25 Closed loop geothermal system manufacturers based in the United States

RevenueBase identified 158 company matches for closed loop geothermal system manufacturers associated with the United States as of October 2026 and tracks 1,613 professional contacts across them, including 686 with verified work emails. Oklahoma City is the largest hub.

This list covers company matches for closed loop geothermal system manufacturers associated with the United States, 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.

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
158Companies
1,613Contacts tracked
686Verified emails
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The 25 largest closed loop geothermal system manufacturers based in the United States

Ranked by team size
Top 25 of 158 company matches for closed loop geothermal system manufacturers based in the United States, 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 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
4Exact 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
5Exact 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
6Exact 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
7Exact 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
8Exact 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
9Exact 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
10Exact 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
11Exact 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
12Exact 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
13Exact 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
14Exact matchOklahoma City, OK, United StatesHQ recorded Oct 9, 202611-5025 contacts →

Exact match

“About GreenFire Energy GreenFire Energy engineers next-generation geothermal systems designed for real-world operating conditions.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15Exact matchReno, NV, United StatesHQ recorded Oct 9, 202611-5024 contacts →

Exact match

“Open Mountain Energy combines its geothermal and project development expertise with Kaishan Group's power plant technologies and manufacturing to form a cutting-edge industry…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16Exact matchGrand Prairie, TX, United StatesHQ recorded Oct 9, 20261-1016 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17Exact matchBaltimore, MD, United StatesHQ recorded Oct 9, 202611-5013 contacts →

Exact match

“In the 30 years of operation, Chesapeake Geosystems has earned a reputation as a geothermal contracting firm that delivers projects on time and on budget.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18Exact matchHampstead, NH, United StatesHQ recorded Oct 9, 202611-5012 contacts →

Exact match

“Water Energy Distributors, Inc, is the northeast leader in the geothermal HVAC industry.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19Exact matchBallston Spa, NY, United StatesHQ recorded Oct 9, 202611-5010 contacts →

Exact match

“Aztech Geothermal, LLC offers a comprehensive solution for renewable geothermal heating and cooling systems in residential and commercial buildings with recognized expertise in…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20Exact matchOmaha, NE, United StatesHQ recorded Oct 9, 202611-5010 contacts →

Exact match

“At Complete Comfort, we're proud of our 20+ years of service to the Omaha area and look forward to helping you with your air conditioning, heating and geothermal needs.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21Exact matchPensacola, United StatesHQ recorded Oct 9, 202611-5010 contacts →

Exact match

“Lee Mechanical & Plumbing, LLC home office is in Pensacola, Florida and also has an office in Henderson, Nevada.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22Exact matchOklahoma City, OK, United StatesHQ recorded Oct 9, 202611-508 contacts →

Exact match

“Since 1975 we have been committed to meeting our customer's needs.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23Exact matchRedmond, WA, United StatesHQ recorded Oct 9, 202651-2008 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
24Exact matchTroy, NY, United StatesHQ recorded Oct 9, 202611-508 contacts →

Exact match

“Founded in 2005, The Radiant Store is a multi-generational family business created to serve the market for renewable energy and low carbon heating and cooling technologies.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25Exact matchSandy, UT, United StatesHQ recorded Oct 9, 20261-107 contacts →

Exact match

“The members of the GreyEdge Group have all been committed to the ground source heat pump industry for many years.”

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

Showing 25 of 158 closed loop geothermal system manufacturers based in the United States

See the full list, filter by size, metro and specialty, and access 686 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Closed loop geothermal system manufacturers based in the United States at a glance

As of Oct 9, 2026
42.5%Verified-email coverage
10.2Average contacts per company
11-50Median size (employees)
2.5%Largest-city concentration · Oklahoma City
Oct 9, 2026Page data refreshed

Companies by employee count

1-10
72
11-50
69
51-200
15
201-500
1
501-1,000
1

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 158 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 the United States 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. 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 686 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.

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 based in the United States?

RevenueBase identified 158 company matches for closed loop geothermal system manufacturers associated with the United States 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 city has the most closed loop geothermal system manufacturers?

Oklahoma City leads with 4 company records, followed by Duncannon (3) and Alpena (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 686 professional contacts with verified work emails tracked across these 158 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.

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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.