Company lists · Data refreshed October 2026

Top 25 Energy efficient heating system providers worldwide

Name: Energy efficient heating system providers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 20,027 companies tracked

RevenueBase identified 20,027 company matches for energy efficient heating system providers worldwide as of October 2026 and tracks 145,270 professional contacts across them, including 39,138 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for energy efficient heating system providers 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 October 12, 2026. Country and city lists for energy efficient heating system providers 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 Oct 12, 2026 How this list was built

20,027Companies

145,270Contacts tracked

39,138Verified emails

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The 25 largest energy efficient heating system providers worldwide

Ranked by team size

Top 25 of 20,027 company matches for energy efficient heating system providers worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 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	Vaillant Group	Exact match	Remscheid, GermanyHQ recorded Oct 12, 2026	10001+	3,153 contacts →
	Exact match “Our corporate vision shapes everything we do and inspires our employees every day.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2	Danfoss Climate Solutions	Exact match	Nordborg, DenmarkHQ recorded Oct 12, 2026	10001+	1,227 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 · Oct 12, 2026 · View company records in RevenueBase
3	GK	Exact match	Oslo, NorwayHQ recorded Oct 12, 2026	1,001-5,000	1,134 contacts →
	Exact match “GK er en ledende teknisk entreprenør og servicepartner.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4	Cmta, INC	Exact match	Louisville, KY, United StatesHQ recorded Oct 12, 2026	501-1,000	1,016 contacts →
	Exact match “CMTA is part of Legence, a Nasdaq Listed company.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5	Proxiserve	Exact match	Levallois-perret, FranceHQ recorded Oct 12, 2026	1,001-5,000	984 contacts →
	Exact match “A major player in the energy transition and leader in home services, PROXISERVE provides its customers with innovative solutions enabling them to reduce their energy consumption…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6	BAXI	Exact match	Warwick, United KingdomHQ recorded Oct 12, 2026	1,001-5,000	884 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 · Oct 12, 2026 · View company records in RevenueBase
7	Feenstra	Exact match	Lelystad, NetherlandsHQ recorded Oct 12, 2026	1,001-5,000	789 contacts →
	Exact match “Sinds het ontstaan in 1947 is Feenstra marktleider in installatietechniek met een nationale dekking.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
8	Vital Energi	Exact match	Blackburn, United KingdomHQ recorded Oct 12, 2026	501-1,000	749 contacts →
	Exact match “Our 30+ years’ experience have involved us in the creation of major UK district heating networks in areas such as Sheffield, Nottingham and London.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9	Aalberts Hydronic Flow Control	Exact match	Almere, NetherlandsHQ recorded Oct 12, 2026	1,001-5,000	658 contacts →
	Exact match “When it comes to comfortable climate in buildings, we set the ultimate standards.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
10	AIRA	Exact match	Stockholm, SwedenHQ recorded Oct 12, 2026	201-500	570 contacts →
	Exact match “Aira is the next generation home energy champion.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11	Stiebel Eltron Group	Exact match	Holzminden, GermanyHQ recorded Oct 12, 2026	5,001-10,000	496 contacts →
	Exact match “STIEBEL ELTRON bietet hocheffiziente Produkte und Dienstleistungen für die Heizung, Kühlung, Lüftung und Warmwasserbereitung von Gebäuden.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	Wolf Gmbh	Exact match	Mainburg, GermanyHQ recorded Oct 12, 2026	1,001-5,000	493 contacts →
	Exact match “As a leading supplier of heating and air handling systems, we are perfectly in tune with you.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	Korra Energi	Exact match	Cairo, EgyptHQ recorded Oct 12, 2026	1,001-5,000	476 contacts →
	Exact match “Korra Energi is a proud Egyptian leader in energy efficiency and construction services, backed by over 25 years of expertise and a vision of "Growth and Prosperity"(إعمار الأرض).” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14	Hoffman & Hoffman, INC	Exact match	Greensboro, NC, United StatesHQ recorded Oct 12, 2026	1,001-5,000	458 contacts →
	Exact match “Since 1947, Hoffman & Hoffman, Inc.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15	Thermondo	Exact match	Berlin, GermanyHQ recorded Oct 12, 2026	1,001-5,000	440 contacts →
	Exact match “Gemeinsam machen wir Wohnen klimaneutral!” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	Ferroli Group	Exact match	San Bonifacio, ItalyHQ recorded Oct 12, 2026	1,001-5,000	435 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	John W. Danforth Company	Exact match	Tonawanda, NY, United StatesHQ recorded Oct 12, 2026	501-1,000	410 contacts →
	Exact match “We are powered by the best people in the industry.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18	Remeha	Exact match	Apeldoorn, NetherlandsHQ recorded Oct 12, 2026	201-500	408 contacts →
	Exact match “Remeha, the comfort innovators Remeha ontwikkelt al sinds 1935 voortdurend innovatieve en energiezuinige producten voor warmte en warm water, zowel voor woningen als utiliteit.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19	KBANE	Exact match	Villeneuve-d’ascq, FranceHQ recorded Oct 12, 2026	501-1,000	373 contacts →
	Exact match “Kbane est la 1ère enseigne en France, dédiée à la maison performante.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20	Logista Hometech	Exact match	Arras, FranceHQ recorded Oct 12, 2026	1,001-5,000	361 contacts →
	Exact match “Spécialiste de la maintenance immobilière, nous entretenons et dépannons les équipements de chauffage, VMC, plomberie, sanitaire, climatisation… pour les bailleurs sociaux et les…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21	AIR Systems, INC	Exact match	San Jose, CA, United StatesHQ recorded Oct 12, 2026	201-500	359 contacts →
	Exact match “Whether building quality work environments, valuable relationships or community ties, Air Systems never cuts corners.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22	United Mechanical	Exact match	San Jose, CA, United StatesHQ recorded Oct 12, 2026	201-500	349 contacts →
	Exact match “United Mechanical specializes in HVAC and Plumbing systems design, construction, retrofit, repair, and 24/7 emergency service for commercial and industrial properties throughout…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
23	Havtech	Exact match	Columbia, MD, United StatesHQ recorded Oct 12, 2026	201-500	342 contacts →
	Exact match “Havtech delivers innovative commercial and industrial HVAC solutions across Maryland, Washington, D.C, Virginia, Pennsylvania, and West Virginia.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24	Boland	Exact match	Gaithersburg, MD, United StatesHQ recorded Oct 12, 2026	201-500	329 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 · Oct 12, 2026 · View company records in RevenueBase
25	Space Engineering Services LTD	Exact match	Bristol, United KingdomHQ recorded Oct 12, 2026	201-500	324 contacts →
	Exact match “Space Engineering Services is the UK’s leading provider of refrigeration, heating, ventilation and air conditioning services.” Recorded in the RevenueBase company graph · Oct 12, 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 “energy efficient heating system providers”. 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 20,027 energy efficient heating system providers worldwide

See the full list, filter by size, metro and specialty, and access 39,138 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Energy efficient heating system providers worldwide at a glance

As of Oct 12, 2026

26.9%Verified-email coverage

7.3Average contacts per company

1-10Median size (employees)

0.6%Largest-city concentration · London

Oct 12, 2026Page data refreshed

Companies by employee count

1-10

10,322

11-50

7,060

51-200

1,714

201-500

272

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 energy efficient heating system providers are linked below.
What qualifies: Company records worldwide whose business descriptions match “energy efficient heating system providers” 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 39,138 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 October 12, 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.

Energy efficient heating system providers by location

46 lists · largest first

Every Energy efficient heating system providers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 “energy efficient heating system providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy efficient heating system providers are there worldwide?

RevenueBase identified 20,027 company matches for energy efficient heating system providers worldwide as of October 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?

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

Which country has the most energy efficient heating system providers?

The United States leads with 3,834 companies, followed by Germany (1,917) and the United Kingdom (1,905). Every energy efficient heating system providers list by country and city is linked on this page.

Which city has the most energy efficient heating system providers?

London leads with 130 company records, followed by Berlin (77) and Rome (72).

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 39,138 professional contacts with verified work emails tracked across these 20,027 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 October 12, 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.