Company lists · Data refreshed September 2026

Top 25 Geothermal heating contractors based in the United States

Name: Geothermal heating 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 1,022 companies tracked

RevenueBase identified 1,022 company matches for geothermal heating contractors associated with the United States as of September 2026 and tracks 7,444 professional contacts across them, including 1,773 with verified work emails. Houston is the largest hub.

This list covers company matches for geothermal heating 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

1,022Companies

7,444Contacts tracked

1,773Verified emails

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The 25 largest geothermal heating contractors based in the United States

Ranked by team size

Top 25 of 1,022 company matches for geothermal heating 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	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
2	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
3	Marshalls INC	Exact match	Lynnwood, WA, United StatesHQ recorded Sep 16, 2026	n/a	168 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
4	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
5	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
6	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
7	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
8	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
9	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
10	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
11	TSS Hvac Services, LLC	Exact match	Boise, ID, United StatesHQ recorded Sep 16, 2026	51-200	59 contacts →
	Exact match “Total System Services is a full service air conditioning and heating contractor located in Boise, Idaho that has been serving thousands of satisfied customers in Idaho…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
12	SUN Kool AIR Conditioning, INC	Exact match	Wildwood, FL, United StatesHQ recorded Sep 16, 2026	201-500	57 contacts →
	Exact match “Air Conditioning and Heating - residential and commercial contractor for new construction, retrofit, and servicing.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
13	Dual Fuel	Exact match	Mount Vernon, NY, United StatesHQ recorded Sep 16, 2026	51-200	57 contacts →
	Exact match “Dual Fuel is a Licensed Master Plumber, General Contractor, NYSERDA Real Time Energy Management (RTEM) System and Service Provider, Coned C&I Partner, Coned Multifamily Partner…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
14	Sierra Pacific Home & Comfort, INC	Exact match	Rancho Cordova, CA, United StatesHQ recorded Sep 16, 2026	51-200	53 contacts →
	Exact match “When you turn to us for your homes' energy efficient upgrade, you can take comfort in knowing you've made the right choice for your Plumbing, Electrical, Solar or Heating and Air…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
15	JK Mechanical, INC	Exact match	Willow Street, PA, United StatesHQ recorded Sep 16, 2026	51-200	52 contacts →
	Exact match “JK Mechanical provides Smart Energy Solutions including Geothermal, Heating, Solar, Electrical, & More in Central Pennsylvania and Maryland.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
16	Allied Well Drilling	Exact match	Laurel, MD, United StatesHQ recorded Sep 16, 2026	51-200	52 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 · Sep 16, 2026 · View company records in RevenueBase
17	Maynard	Exact match	Nashville, TN, United StatesHQ recorded Sep 16, 2026	51-200	52 contacts →
	Exact match “Maynard is a company with one focus: to be the community leader in climate solutions for Middle Tennessee.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
18	MAJOR	Exact match	Wheat Ridge, CO, United StatesHQ recorded Sep 16, 2026	11-50	50 contacts →
	Exact match “As Denver HVAC specialists and geothermal system experts, we believe in doing things right!” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
19	AIR Comfort INC	Exact match	Jenks, United StatesHQ recorded Sep 16, 2026	51-200	42 contacts →
	Exact match “Air Comfort, Inc.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
20	Performance Insulation Energy Services, INC	Exact match	Tigard, OR, United StatesHQ recorded Sep 16, 2026	51-200	40 contacts →
	Exact match “Since 2013, Performance Insulation & Energy Services has been offering cost-effective insulation, weatherization, and energy services to builders in the Pacific Northwest.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
21	Groff's Heating, AIR Conditioning, & Plumbing, INC	Exact match	Willow Street, PA, United StatesHQ recorded Sep 16, 2026	51-200	39 contacts →
	Exact match “Plumbing, HVAC, and Electrical Service Contractor in the following markets- Residential & commercial service & repairs of mechanical systems of all nature - Bathroom remodeling &…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
22	Darcy Solutions	Exact match	New Brighton, MN, United StatesHQ recorded Sep 16, 2026	11-50	38 contacts →
	Exact match “Darcy Solutions is on a mission to put Geothermal Everywhere.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
23	FORGE	Exact match	Newton, MA, United StatesHQ recorded Sep 16, 2026	51-200	37 contacts →
	Exact match “Forge makes home comfort simple and sustainable with energy-efficient heat pump installations.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
24	XGS Energy	Exact match	Palo Alto, CA, United StatesHQ recorded Sep 16, 2026	11-50	34 contacts →
	Exact match “XGS Energy is a geothermal energy company founded and headquartered in Palo Alto, CA.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
25	Team Bob's Heating Cooling Plumbing	Exact match	Traverse City, MI, United StatesHQ recorded Sep 16, 2026	51-200	34 contacts →
	Exact match “Team Bob’s Heating Cooling Plumbing has been a commercial and residential HVAC and plumbing service and installation company serving Northern Michigan for nearly 40 years.” 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 heating 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 1,022 geothermal heating contractors based in the United States

See the full list, filter by size, metro and specialty, and access 1,773 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geothermal heating contractors based in the United States at a glance

As of Sep 16, 2026

23.8%Verified-email coverage

7.3Average contacts per company

1-10Median size (employees)

0.8%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

541

11-50

379

51-200

201-500

501-1,000

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 1,022 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 heating 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 1,773 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 heating contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 1,022 company matches for geothermal heating 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?

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

Which city has the most geothermal heating contractors?

Houston leads with 8 company records, followed by Rochester (7) and Burlington (6).

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 1,773 professional contacts with verified work emails tracked across these 1,022 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.