Company lists · Data refreshed September 2026

Top 25 District heating and cooling companies based in the United States

Name: District heating and cooling companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 116 companies tracked

RevenueBase identified 116 district heating and cooling companies headquartered in the United States as of September 2026 and tracks 1,703 professional contacts across them, including 497 with verified work emails. Boston is the largest hub.

This list covers district heating and cooling companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

116Companies

1,703Contacts tracked

497Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest district heating and cooling companies based in the United States

Ranked by team size

Top 25 of 116 district heating and cooling companies based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to district heating and cooling companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Vicinity Energy	Partial evidence	Boston, MA, United StatesHQ checked Sep 19, 2026	501-1,000	286 contacts →
	Partial evidence “Vicinity Energy is a leading district energy company that owns and operates the largest portfolio of district energy systems nationwide, providing steam, hot water, and chilled…” Source: RevenueBase Database · checked Sep 19, 2026
2	Dandelion Energy	Strong evidence	Mount Kisco, NY, United StatesHQ checked Sep 19, 2026	51-200	118 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026
3	Tecogen INC	Indirect evidence	North Billerica, MA, United StatesHQ checked Sep 19, 2026	51-200	64 contacts →
	Indirect evidence “Tecogen is a leading manufacturer of Combined Heat and Power products including natural gas engine-driven cogeneration, air conditioning systems and high efficiency water heaters…” Source: RevenueBase Database · checked Sep 19, 2026
4	Thermal Energy Corporation	Indirect evidence	Houston, TX, United StatesHQ checked Sep 19, 2026	51-200	50 contacts →
	Indirect evidence “Houston-based Thermal Energy Corporation (TECO) is the energy behind what’s next on the campus of the Texas Medical Center (TMC), the world’s largest medical city.” Source: RevenueBase Database · checked Sep 19, 2026
5	Darcy Solutions	Indirect evidence	New Brighton, MN, United StatesHQ checked Sep 19, 2026	11-50	38 contacts →
	Indirect evidence “Darcy Solutions is on a mission to put Geothermal Everywhere.” Source: RevenueBase Database · checked Sep 19, 2026
6	FORGE	Indirect evidence	Newton, MA, United StatesHQ checked Sep 19, 2026	51-200	37 contacts →
	Indirect evidence “Forge makes home comfort simple and sustainable with energy-efficient heat pump installations.” Source: RevenueBase Database · checked Sep 19, 2026
7	Detroit Thermal, LLC	Indirect evidence	Detroit, MI, United StatesHQ checked Sep 19, 2026	11-50	37 contacts →
	Indirect evidence “Detroit Thermal, L.L.C.” Source: RevenueBase Database · checked Sep 19, 2026
8	Symbiont Service Corp	Strong evidence	Englewood, FL, United StatesHQ checked Sep 19, 2026	11-50	23 contacts →
	Strong evidence “Offering high quality, Energy Efficient and Eco-Friendly Geothermal Pool / Spa Heating & Cooling as well as Geothermal Air Conditioning in the whole state of Florida.” Source: RevenueBase Database · checked Sep 19, 2026
9	Hassler Heating And AIR Conditioning	Strong evidence	El Cerrito, CA, United StatesHQ checked Sep 19, 2026	11-50	18 contacts →
	Strong evidence “Hassler Heating and Air Conditioning, Inc.(HHAC) provides exceptional residential heating and cooling services with a focus on improving your homes energy efficiency.” Source: RevenueBase Database · checked Sep 19, 2026
10	Vertex Mechanical INC	Indirect evidence	Stevens, PA, United StatesHQ checked Sep 19, 2026	11-50	18 contacts →
	Indirect evidence “Vertex Mechanical is a full service HVAC company serving customers in Lancaster, Berks, and Chester County, PA.” Source: RevenueBase Database · checked Sep 19, 2026
11	Hunt Utilities Group	Indirect evidence	Pine River, United StatesHQ checked Sep 19, 2026	1-10	18 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
12	Sumzero Energy Systems	Strong evidence	Holliston, MA, United StatesHQ checked Sep 19, 2026	11-50	18 contacts →
	Strong evidence “We are a team of experienced professionals who are dedicated to providing high-quality, energy-efficient heating & cooling solutions for our customers.” Source: RevenueBase Database · checked Sep 19, 2026
13	International District Energy Association	Partial evidence	Westborough, MA, United StatesHQ checked Sep 19, 2026	1-10	16 contacts →
	Partial evidence “The International District Energy Association (IDEA) is a nonprofit industry association that is committed to building a faster path to net zero by advancing district energy, an…” Source: RevenueBase Database · checked Sep 19, 2026
14	N&t Mechanical Contractors INC	Strong evidence	Sterling, MA, United StatesHQ checked Sep 19, 2026	51-200	14 contacts →
	Strong evidence “Ensure your employees and equipment in your commercial or industrial building are able to work effectively with exceptional heating and cooling services from N&T Mechanical…” Source: RevenueBase Database · checked Sep 19, 2026
15	Aris Hydronics	Indirect evidence	Milwaukie, OR, United StatesHQ checked Sep 19, 2026	1-10	14 contacts →
	Indirect evidence “Aris Hydronics is building the future of home comfort.” Source: RevenueBase Database · checked Sep 19, 2026
16	Diversified Heating & Cooling, INC	Indirect evidence	Farmington Hills, MI, United StatesHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
17	Warm Corp West	Strong evidence	Napa, CA, United StatesHQ checked Sep 19, 2026	11-50	12 contacts →
	Strong evidence “Warm Corp West is a design-build mechanical contractor, specializing in hydronic radiant heating and cooling systems since 1977.” Source: RevenueBase Database · checked Sep 19, 2026
18	Aztech Geothermal, LLC	Strong evidence	Ballston Spa, NY, United StatesHQ checked Sep 19, 2026	11-50	10 contacts →
	Strong evidence “Aztech Geothermal, LLC offers a comprehensive solution for renewable geothermal heating and cooling systems in residential and commercial buildings with recognized expertise in…” Source: RevenueBase Database · checked Sep 19, 2026
19	Colmac Waterheat	Partial evidence	Colville, WA, United StatesHQ checked Sep 19, 2026	51-200	8 contacts →
	Partial evidence “Colmac heat pumps offer commercial and industrial users of sanitary hot water, an energy efficient means of heating water to temperatures as high as 176°F (80°C).” Source: RevenueBase Database · checked Sep 19, 2026
20	Rochester District Heating Cooperative	Strong evidence	Rochester, NY, United StatesHQ checked Sep 19, 2026	11-50	8 contacts →
	Strong evidence “At Rochester District Heating (RDH) we are committed to the Rochester community, producing and delivering reliable, high quality steam since 1985.” Source: RevenueBase Database · checked Sep 19, 2026
21	The Radiant Store INC	Strong evidence	Troy, NY, United StatesHQ checked Sep 19, 2026	11-50	8 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026
22	Lakes Region Hvac	Strong evidence	Northfield, NH, United StatesHQ checked Sep 19, 2026	11-50	7 contacts →
	Strong evidence “We are a full service HVAC company, specializing in geothermal heating and cooling, radaint heat, oil heat, gas heat, solar hot water, forced hot air systems, forced hot water…” Source: RevenueBase Database · checked Sep 19, 2026
23	Cape COD Heat Pumps	Indirect evidence	Marstons Mills, MA, United StatesHQ checked Sep 19, 2026	1-10	7 contacts →
	Indirect evidence “Installing ductless systems takes the hassle out of designing comfortable indoor environments.” Source: RevenueBase Database · checked Sep 19, 2026
24	S&s Heating And AIR Conditioning	Strong evidence	Norristown, PA, United StatesHQ checked Sep 19, 2026	11-50	7 contacts →
	Strong evidence “S and S Heating and Air Conditioning uses innovative equipment, emerging technology, and geothermal heating and cooling to provides the highest level of efficiency, affordability…” Source: RevenueBase Database · checked Sep 19, 2026
25	Sensible Heating & Cooling	Strong evidence	Littleton, CO, United StatesHQ checked Sep 19, 2026	1-10	7 contacts →
	Strong evidence “Sensible Heating & Cooling is Denver’s Premier Heating & Cooling company, offering a wealth of experience and knowledge in traditional HVAC as well as alternative systems such as…” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: district heating and cooling companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names district heating and cooling companies.
Partial evidence: Its own public description names part of district heating and cooling companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name district heating and cooling companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 116 district heating and cooling companies based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 497 reachable decision-makers.

Free signup · no credit card

View the full list →

District heating and cooling companies based in the United States at a glance

As of Sep 19, 2026

29.2%Verified-email coverage

14.7Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · Boston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

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 116 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among district heating and cooling companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “district heating and cooling companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names district heating and cooling companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among district heating and cooling companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 497 across the full list. 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.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names district heating and cooling companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many district heating and cooling companies are there based in the United States?

RevenueBase identified 116 district heating and cooling companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Vicinity Energy, headquartered in Boston, tops this list with the largest team on record.

Which city has the most district heating and cooling companies?

Boston leads with 3 headquartered companies, followed by Cleveland (3) and Denver (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 497 verified decision-maker contacts tracked across these 116 companies.

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.

Ready to reach these companies? Verified emails and direct dials for all 116 district heating and cooling companies based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

District heating and cooling companies by geography

Browse the directory

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 Smart Search, 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.