Company lists · Data refreshed September 2026

Top 25 Commercial geothermal installers worldwide

Name: Commercial geothermal installers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 5,291 companies tracked

RevenueBase identified 5,291 company matches for commercial geothermal installers worldwide as of September 2026 and tracks 37,119 professional contacts across them, including 11,403 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for commercial geothermal installers 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 September 19, 2026. Country and city lists for commercial geothermal installers 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 Sep 19, 2026 How this list was built

5,291Companies

37,119Contacts tracked

11,403Verified emails

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The 25 largest commercial geothermal installers worldwide

Ranked by team size

Top 25 of 5,291 company matches for commercial geothermal installers worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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	Danfoss Climate Solutions	Exact match	Nordborg, DenmarkHQ recorded Sep 19, 2026	10001+	1,128 contacts →
	Exact match “At Danfoss Climate Solutions, we engineer energy-efficient heating and cooling solutions to help the world get more out of less.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	BAXI	Exact match	Warwick, United KingdomHQ recorded Sep 19, 2026	1,001-5,000	850 contacts →
	Exact match “We're leading the energy transition to zero carbon, by offering complete residential and commercial heating and hot water solutions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	Feenstra	Exact match	Lelystad, NetherlandsHQ recorded Sep 19, 2026	1,001-5,000	781 contacts →
	Exact match “Sinds het ontstaan in 1947 is Feenstra marktleider in installatietechniek met een nationale dekking.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	AIR Systems, INC	Exact match	San Jose, CA, United StatesHQ recorded Sep 19, 2026	201-500	348 contacts →
	Exact match “Whether building quality work environments, valuable relationships or community ties, Air Systems never cuts corners.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Boland	Exact match	Gaithersburg, MD, United StatesHQ recorded Sep 19, 2026	201-500	323 contacts →
	Exact match “Boland is the leading commercial HVAC systems, services, and building energy solutions provider in the DC metro area.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	Arclima Engenharia	Exact match	Cabo De Santo Agostinho, BrazilHQ recorded Sep 19, 2026	201-500	265 contacts →
	Exact match “A Arclima Engenharia é uma empresa brasileira especializada em Climatização, Refrigeração e Eficiência Energética (HVAC), com atuação em todo o território nacional.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Waterfurnace International	Exact match	Fort Wayne, IN, United StatesHQ recorded Sep 19, 2026	201-500	224 contacts →
	Exact match “WaterFurnace International, Inc.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	Tolin Mechanical Systems	Exact match	Denver, CO, United StatesHQ recorded Sep 19, 2026	201-500	220 contacts →
	Exact match “Tolin Mechanical is a Leading Energy & Commercial HVAC Services Company.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Holaday-Parks, INC	Exact match	Tukwila, WA, United StatesHQ recorded Sep 19, 2026	201-500	218 contacts →
	Exact match “As one of the largest full service mechanical contractors headquartered in the Pacific Northwest, Holaday Parks has grown well beyond Seattle.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Saman Groep	Exact match	Zierikzee, NetherlandsHQ recorded Sep 19, 2026	201-500	211 contacts →
	Exact match “De energietransitie is één van de grootste maatschappelijke opgaven, maar wij begrijpen dat jouw wooncomfort net zo belangrijk is.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Dalkia Energy Solutions	Exact match	Beverly, MA, United StatesHQ recorded Sep 19, 2026	201-500	210 contacts →
	Exact match “Dalkia Energy Solutions, a subsidiary of the EDF (Électricité de France) Group, is a national leader in energy efficiency and sustainability for commercial, industrial, and…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	Haynes Mechanical Systems	Exact match	Greenwood Village, CO, United StatesHQ recorded Sep 19, 2026	201-500	190 contacts →
	Exact match “Haynes Mechanical Systems has been keeping commercial buildings running strong since 1968.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Maxair Mechanical	Exact match	Marietta, GA, United StatesHQ recorded Sep 19, 2026	201-500	183 contacts →
	Exact match “MAXAIR Mechanical, founded in 1988, is a people first company.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	Emcor Services Aircond	Exact match	Smyrna, GA, United StatesHQ recorded Sep 19, 2026	201-500	178 contacts →
	Exact match “Backed by 80 years of experience, the more than 300 associates at EMCOR Services Aircond design and deliver comprehensive, timely, and cost effective HVAC and building system…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	Hill York	Exact match	Dania Beach, FL, United StatesHQ recorded Sep 19, 2026	201-500	168 contacts →
	Exact match “Hill York is a full service contractor that offers a full array of energy efficient air-conditioning services from concept to completion, maintenance to repair and everything in…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Mcclure Company	Exact match	Harrisburg, PA, United StatesHQ recorded Sep 19, 2026	201-500	166 contacts →
	Exact match “Headquartered in Harrisburg, Pennsylvania, McClure Company is one of the mid-Atlantic's largest, fully integrated mechanical construction, engineering, maintenance and energy…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Agtherm	Exact match	Colomiers, FranceHQ recorded Sep 19, 2026	51-200	159 contacts →
	Exact match “Agtherm est une PME indépendante dont l'activité dans le domaine du génie climatique et de la performance énergétique, vous assure la sécurité et la qualité de ses interventions…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	GSM Services	Exact match	Gastonia, NC, United StatesHQ recorded Sep 19, 2026	201-500	159 contacts →
	Exact match “For nearly a century, GSM Services has built its reputation on reliability, honesty, expert service, and high-quality workmanship.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	accenta.ai	Exact match	Boulogne-billancourt, FranceHQ recorded Sep 19, 2026	51-200	149 contacts →
	Exact match “Accenta aide les acteurs de l’immobilier à maîtriser leurs charges, valoriser leurs actifs et répondre aux exigences réglementaires, grâce à la performance énergie-carbone.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	ETECK	Exact match	Voorburg, NetherlandsHQ recorded Sep 19, 2026	51-200	149 contacts →
	Exact match “Eteck levert duurzame energie in de vorm van koude en warmte.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	Vitaclim	Exact match	Montpellier, FranceHQ recorded Sep 19, 2026	201-500	132 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Iceland Drilling Company LTD	Exact match	IcelandHQ recorded Sep 19, 2026	51-200	128 contacts →
	Exact match “ABOUT http://iceland-drilling.com/ Iceland Drilling Ltd is a leading high technical company in the field of high temperature geothermal drilling and has many decades of experience…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	Dandelion Energy	Exact match	Mount Kisco, NY, United StatesHQ recorded Sep 19, 2026	51-200	118 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 · Sep 19, 2026 · View company records in RevenueBase
24	Melink Corporation	Exact match	Milford, OH, United StatesHQ recorded Sep 19, 2026	51-200	116 contacts →
	Exact match “We are a global provider of energy efficiency solutions for commercial buildings with five business offerings: HVAC Testing, Adjusting & Balancing, Intelli-Hood® Kitchen…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Powers Building Hvac, Controls, And Service	Exact match	North Little Rock, AR, United StatesHQ recorded Sep 19, 2026	201-500	113 contacts →
	Exact match “Our goal at Powers is to make your buildings productive, comfortable, and efficient to operate.” Recorded in the RevenueBase company graph · Sep 19, 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 installers”. 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 5,291 commercial geothermal installers worldwide

See the full list, filter by size, metro and specialty, and access 11,403 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Commercial geothermal installers worldwide at a glance

As of Sep 19, 2026

30.7%Verified-email coverage

7.0Average contacts per company

1-10Median size (employees)

0.6%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

2,690

11-50

1,941

51-200

480

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 commercial geothermal installers are linked below.
What qualifies: Company records worldwide whose business descriptions match “commercial geothermal installers” 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 11,403 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 September 19, 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.

Commercial geothermal installers by location

18 lists · largest first

Every Commercial geothermal installers 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 “commercial geothermal installers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many commercial geothermal installers are there worldwide?

RevenueBase identified 5,291 company matches for commercial geothermal installers worldwide as of September 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?

Danfoss Climate Solutions tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most commercial geothermal installers?

The United States leads with 1,153 companies, followed by France (509) and the United Kingdom (352). Every commercial geothermal installers list by country and city is linked on this page.

Which city has the most commercial geothermal installers?

London leads with 31 company records, followed by Madrid (27) and Houston (19).

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 11,403 professional contacts with verified work emails tracked across these 5,291 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 September 19, 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.