Company lists · Data refreshed September 2026

Top 25 Heat recovery system installation companies worldwide

Name: Heat recovery system installation companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 5,251 companies tracked

RevenueBase identified 5,251 heat recovery system installation companies worldwide as of September 2026 and tracks 42,221 professional contacts across them, including 11,128 with verified work emails. The United Kingdom is the largest market and London the largest hub.

This list covers heat recovery system installation companies worldwide, 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 20, 2026. Country and city lists for heat recovery system installation companies follow the table.

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 20, 2026 86% judged on-target in blind review

5,251Companies

42,221Contacts tracked

11,128Verified emails

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The 25 largest heat recovery system installation companies worldwide

Ranked by team size

Top 25 of 5,251 heat recovery system installation companies worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to heat recovery system installation 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	Danfoss Climate Solutions	Indirect evidence	Nordborg, DenmarkHQ checked Sep 20, 2026	10001+	1,128 contacts →
	Indirect evidence “At Danfoss Climate Solutions, we engineer energy-efficient heating and cooling solutions to help the world get more out of less.” Source: RevenueBase Database · checked Sep 20, 2026
2	BAXI	Indirect evidence	Warwick, United KingdomHQ checked Sep 20, 2026	1,001-5,000	850 contacts →
	Indirect evidence “We're leading the energy transition to zero carbon, by offering complete residential and commercial heating and hot water solutions.” Source: RevenueBase Database · checked Sep 20, 2026
3	Hamon Group	Indirect evidence	Seraing, BelgiumHQ checked Sep 20, 2026	1,001-5,000	662 contacts →
	Indirect evidence “The Hamon Group does not exist anymore.” Source: RevenueBase Database · checked Sep 20, 2026
4	Harris PYE	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 20, 2026	501-1,000	595 contacts →
	Indirect evidence “At Harris Pye, everything we do saves energy.” Source: RevenueBase Database · checked Sep 20, 2026
5	Stiebel Eltron Group	Indirect evidence	Holzminden, GermanyHQ checked Sep 20, 2026	5,001-10,000	493 contacts →
	Indirect evidence “STIEBEL ELTRON bietet hocheffiziente Produkte und Dienstleistungen für die Heizung, Kühlung, Lüftung und Warmwasserbereitung von Gebäuden.” Source: RevenueBase Database · checked Sep 20, 2026
6	Euroasiatic	Partial evidence	Bumi Serpong Damai City Tangerang Selatan, IndonesiaHQ checked Sep 20, 2026	201-500	440 contacts →
	Partial evidence “Euroasiatic (EA) is a Heat & Power Generation Solutions Provider.” Source: RevenueBase Database · checked Sep 20, 2026
7	Ferroli Group	Indirect evidence	San Bonifacio, ItalyHQ checked Sep 20, 2026	1,001-5,000	418 contacts →
	Indirect evidence “Comfort, designed around you – Since 1955, Ferroli has been a trusted name in HVAC, delivering innovative solutions for heating, cooling and hot water that combine comfort, energy…” Source: RevenueBase Database · checked Sep 20, 2026
8	Vaillant Group Türkiye	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 20, 2026	1,001-5,000	365 contacts →
	Indirect evidence “Vaillant Group, ısıtma ve havalandırma teknolojisi alanlarında uluslararası pazarlarda lider bir kuruluştur.” Source: RevenueBase Database · checked Sep 20, 2026
9	API Heat Transfer	Partial evidence	Buffalo, NY, United StatesHQ checked Sep 20, 2026	1,001-5,000	364 contacts →
	Partial evidence “API Heat Transfer is a leading global provider of heat transfer solutions, recognized for delivering innovative, energy-efficient equipment for more than 140 years.” Source: RevenueBase Database · checked Sep 20, 2026
10	Space Engineering Services LTD	Indirect evidence	Bristol, United KingdomHQ checked Sep 20, 2026	201-500	312 contacts →
	Indirect evidence “Space Engineering Services is the UK’s leading provider of refrigeration, heating, ventilation and air conditioning services.” Source: RevenueBase Database · checked Sep 20, 2026
11	Rinnai Australia	Indirect evidence	Braeside, AustraliaHQ checked Sep 20, 2026	201-500	294 contacts →
	Indirect evidence “Following Rinnai's international origins dating back more than 100 years, Rinnai Australia was established 50 years ago and since then has been providing Australians with the best…” Source: RevenueBase Database · checked Sep 20, 2026
12	Arclima Engenharia	Indirect evidence	Cabo De Santo Agostinho, BrazilHQ checked Sep 20, 2026	201-500	265 contacts →
	Indirect evidence “A Arclima Engenharia é uma empresa brasileira especializada em Climatização, Refrigeração e Eficiência Energética (HVAC), com atuação em todo o território nacional.” Source: RevenueBase Database · checked Sep 20, 2026
13	Star Center	Indirect evidence	Diadema, BrazilHQ checked Sep 20, 2026	501-1,000	261 contacts →
	Indirect evidence “Excelência Em Obras de Engenharia em Climatização.” Source: RevenueBase Database · checked Sep 20, 2026
14	Sermeta	Partial evidence	Morlaix, FranceHQ checked Sep 20, 2026	501-1,000	256 contacts →
	Partial evidence “Sermeta is the world leading manufacturer of stainless steel heat exchanger for gas condensing boilers.” Source: RevenueBase Database · checked Sep 20, 2026
15	Serck Global	Strong evidence	Oxford, United KingdomHQ checked Sep 20, 2026	501-1,000	232 contacts →
	Strong evidence “Serck provides specialist design, manufacture, installation, service, and global export of heat transfer technology across a range of sectors and geographies.” Source: RevenueBase Database · checked Sep 20, 2026
16	Thermal Systems Hyderabad Pvt. LTD	Strong evidence	Hyderabad, IndiaHQ checked Sep 20, 2026	501-1,000	230 contacts →
	Strong evidence “Thermal Systems (TSPL) is a fast growing ISO 9001 certified heavy engineering company engaged in Waste Heat Recovery solutions around the world.” Source: RevenueBase Database · checked Sep 20, 2026
17	Thermal Engineering International USA INC	Indirect evidence	La Palma, CA, United StatesHQ checked Sep 20, 2026	201-500	219 contacts →
	Indirect evidence “At TEi, we help the power and process industries operate safely, sustainably, and without costly downtime.” Source: RevenueBase Database · checked Sep 20, 2026
18	Nooter Eriksen, INC	Strong evidence	St. Louis, MO, United StatesHQ checked Sep 20, 2026	201-500	198 contacts →
	Strong evidence “Nooter/Eriksen, the world's leading independent supplier of Natural Circulation Heat Recovery Steam Generators (HRSG) behind gas turbines, is a single source supplier of custom…” Source: RevenueBase Database · checked Sep 20, 2026
19	Vaillant UK	Indirect evidence	Belper, United KingdomHQ checked Sep 20, 2026	501-1,000	179 contacts →
	Indirect evidence “What does it take to deliver confidence at every stage of the heating journey?” Source: RevenueBase Database · checked Sep 20, 2026
20	Annexair	Partial evidence	St-germain-de-grantham, QC, CanadaHQ checked Sep 20, 2026	201-500	178 contacts →
	Partial evidence “Annexair is a privately held North American company focused exclusively on designing and manufacturing high-quality, energy-efficient air handling systems.” Source: RevenueBase Database · checked Sep 20, 2026
21	Hudson Technologies	Indirect evidence	Woodcliff Lake, NJ, United StatesHQ checked Sep 20, 2026	201-500	172 contacts →
	Indirect evidence “At Hudson Technologies, we focus our full attention on refrigerants and how they impact chiller performance.” Source: RevenueBase Database · checked Sep 20, 2026
22	Hill York	Indirect evidence	Dania Beach, FL, United StatesHQ checked Sep 20, 2026	201-500	168 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
23	Agtherm	Indirect evidence	Colomiers, FranceHQ checked Sep 20, 2026	51-200	159 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 20, 2026
24	Swale Heating Part Of Sureserve	Partial evidence	Sittingbourne, United KingdomHQ checked Sep 20, 2026	201-500	136 contacts →
	Partial evidence “As an established heating company based in Kent, Swale Heating are proud to offer expert guidance in choosing the best heating and boiler systems & products available today.” Source: RevenueBase Database · checked Sep 20, 2026
25	Vitaclim	Indirect evidence	Montpellier, FranceHQ checked Sep 20, 2026	201-500	132 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 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: heat recovery system installation 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 heat recovery system installation companies.
Partial evidence: Its own public description names part of heat recovery system installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name heat recovery system installation 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 5,251 heat recovery system installation companies worldwide

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Heat recovery system installation companies worldwide at a glance

As of Sep 20, 2026

26.4%Verified-email coverage

8.0Average contacts per company

1-10Median size (employees)

0.8%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

2,744

11-50

1,785

51-200

461

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among heat recovery system installation 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.
Coverage: Every country. Country and city lists for heat recovery system installation companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “heat recovery system installation 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 heat recovery system installation 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 heat recovery system installation companies, and records with no verified work email.
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, 11,128 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 20, 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.

Heat recovery system installation companies by location

24 lists · largest first

Every Heat recovery system installation companies 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 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 heat recovery system installation 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 heat recovery system installation companies are there worldwide?

RevenueBase identified 5,251 heat recovery system installation companies worldwide 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?

Danfoss Climate Solutions, headquartered in Nordborg, tops this list with the largest team on record.

Which country has the most heat recovery system installation companies?

The United Kingdom leads with 595 companies, followed by France (531) and the United States (505). Every heat recovery system installation companies list by country and city is linked on this page.

Which city has the most heat recovery system installation companies?

London leads with 41 headquartered companies, followed by Madrid (26) and Pune (23).

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 11,128 verified decision-maker contacts tracked across these 5,251 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 20, 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 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.