Company lists · Data refreshed September 2026

Top 25 Geothermal installation contractors based in the United States

Name: Geothermal installation contractors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 2,280 companies tracked

RevenueBase identified 2,280 company matches for geothermal installation contractors associated with the United States as of September 2026 and tracks 15,954 professional contacts across them, including 4,672 with verified work emails. Houston is the largest hub.

This list covers company matches for geothermal installation contractors 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 September 16, 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 Sep 16, 2026 How this list was built

2,280Companies

15,954Contacts tracked

4,672Verified emails

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The 25 largest geothermal installation contractors based in the United States

Ranked by team size

Top 25 of 2,280 company matches for geothermal installation contractors based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 16, 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	Ormat Technologies, INC	Exact match	Reno, NV, United StatesHQ recorded Sep 16, 2026	1,001-5,000	1,281 contacts →
	Exact match “With over five decades of experience, Ormat Technologies, Inc.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
2	Reliable Heating & AIR	Exact match	Kennesaw, GA, United StatesHQ recorded Sep 16, 2026	201-500	231 contacts →
	Exact match “Since 1978, Reliable Heating & Air has been serving all of Metro Atlanta's communities offering heating, cooling, plumbing and electrical services, indoor air quality, duct…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
3	Waterfurnace International	Exact match	Fort Wayne, IN, United StatesHQ recorded Sep 16, 2026	201-500	224 contacts →
	Exact match “WaterFurnace International, Inc.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
4	Airtron Heating & AIR Conditioning	Exact match	Columbus, OH, United StatesHQ recorded Sep 16, 2026	1,001-5,000	214 contacts →
	Exact match “Airtron has developed itself into one of the leading heating, ventilation, and air conditioning (HVAC) providers.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
5	Haller Enterprises	Exact match	Lititz, PA, United StatesHQ recorded Sep 16, 2026	201-500	191 contacts →
	Exact match “Since 1981, Haller Enterprises has proudly served central and eastern Pennsylvania as a leader in heating, cooling, plumbing, and electrical services.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
6	Haynes Mechanical Systems	Exact match	Greenwood Village, CO, United StatesHQ recorded Sep 16, 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 16, 2026 · View company records in RevenueBase
7	Hill York	Exact match	Dania Beach, FL, United StatesHQ recorded Sep 16, 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 16, 2026 · View company records in RevenueBase
8	GSM Services	Exact match	Gastonia, NC, United StatesHQ recorded Sep 16, 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 16, 2026 · View company records in RevenueBase
9	Dandelion Energy	Exact match	Mount Kisco, NY, United StatesHQ recorded Sep 16, 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 16, 2026 · View company records in RevenueBase
10	Melink Corporation	Exact match	Milford, OH, United StatesHQ recorded Sep 16, 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 16, 2026 · View company records in RevenueBase
11	Powers Building Hvac, Controls, And Service	Exact match	North Little Rock, AR, United StatesHQ recorded Sep 16, 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 16, 2026 · View company records in RevenueBase
12	Midwest Mechanical Commercial, Industrial Hvac Mechanical Services	Exact match	Lombard, IL, United StatesHQ recorded Sep 16, 2026	51-200	110 contacts →
	Exact match “Chicago's Facilities Management Company Midwest Mechanical is a commercial HVAC services and facility management company focused on energy efficiency for building owners and…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
13	Encon Heating & A C	Exact match	Stratford, CT, United StatesHQ recorded Sep 16, 2026	201-500	110 contacts →
	Exact match “At ENCON, we take care of people.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
14	Lawyer Mechanical Services	Exact match	Las Vegas, NV, United StatesHQ recorded Sep 16, 2026	51-200	110 contacts →
	Exact match “Lawyer Mechanical Services (LMS) creates and maintains comfort.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
15	Brightcore Energy	Exact match	Armonk, NY, United StatesHQ recorded Sep 16, 2026	51-200	108 contacts →
	Exact match “Brightcore Energy is a leading renewable energy solutions provider serving commercial, institutional, and government clients.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
16	Robison	Exact match	Port Chester, NY, United StatesHQ recorded Sep 16, 2026	51-200	92 contacts →
	Exact match “For more than 100 years, Robison has been a staple in Westchester and Putnam counties, servicing nearly homes while earning an A+ from the Better Business Bureau.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
17	James River AIR Conditioning Company	Exact match	Richmond, VA, United StatesHQ recorded Sep 16, 2026	51-200	91 contacts →
	Exact match “James River Air Conditioning, Inc.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
18	Casa Mechanical Services	Exact match	Round Rock, TX, United StatesHQ recorded Sep 16, 2026	51-200	89 contacts →
	Exact match “CASA Mechanical is owned and operated by the W.G.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
19	AIR Mechanical INC	Exact match	Ham Lake, MN, United StatesHQ recorded Sep 16, 2026	51-200	87 contacts →
	Exact match “Creating Custom Comfort since 1985!” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
20	HALCO	Exact match	Phelps, NY, United StatesHQ recorded Sep 16, 2026	51-200	82 contacts →
	Exact match “Halco is a highly accredited, national award-winning contractor that has been providing high-quality solutions to residential and commercial clients since 1984.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
21	Enertech Global, LLC	Exact match	Greenville, IL, United StatesHQ recorded Sep 16, 2026	51-200	81 contacts →
	Exact match “Enertech Global is a leading manufacturer and visionary in the geothermal heating and cooling industry.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
22	Energy 1	Exact match	Bozeman, MT, United StatesHQ recorded Sep 16, 2026	201-500	72 contacts →
	Exact match “Energy 1 designs and installs state-of-the-art Mechanical, Electrical, and Plumbing systems that utilize renewable technologies and deliver efficiency, elegance, and legacies our…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
23	Roscoe Brown, INC	Exact match	Murfreesboro, TN, United StatesHQ recorded Sep 16, 2026	51-200	65 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
24	ARC Mechanical	Exact match	Wilmington, MA, United StatesHQ recorded Sep 16, 2026	51-200	64 contacts →
	Exact match “Founded in 1996, ARC Mechanical offers a full range of commercial and industrial HVAC/R services, including 24/7 emergency response.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
25	Cooper Heating, Cooling, Plumbing, & Electrical	Exact match	Broomfield, CO, United StatesHQ recorded Sep 16, 2026	51-200	64 contacts →
	Exact match “A healthy home starts with the air you breathe.” Recorded in the RevenueBase company graph · Sep 16, 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 installation 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 2,280 geothermal installation contractors based in the United States

See the full list, filter by size, metro and specialty, and access 4,672 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal installation contractors based in the United States at a glance

As of Sep 16, 2026

29.3%Verified-email coverage

7.0Average contacts per company

1-10Median size (employees)

1.0%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

1,127

11-50

904

51-200

186

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 2,280 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 “geothermal installation 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 4,672 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 16, 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 installation contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geothermal installation contractors are there based in the United States?

RevenueBase identified 2,280 company matches for geothermal installation contractors associated with the United States 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?

Ormat Technologies, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most geothermal installation contractors?

Houston leads with 23 company records, followed by New York (21) and San Antonio (13).

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 4,672 professional contacts with verified work emails tracked across these 2,280 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 16, 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.