Company lists · Data refreshed September 2026

Top 25 Oil heating equipment manufacturers worldwide

Name: Oil heating equipment manufacturers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 1,847 companies tracked

RevenueBase identified 1,847 oil heating equipment manufacturers worldwide as of September 2026 and tracks 38,813 professional contacts across them, including 9,682 with verified work emails. The United States is the largest market and Istanbul the largest hub.

This list covers oil heating equipment manufacturers 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 30, 2026. Country and city lists for oil heating equipment manufacturers 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 30, 2026 86% judged on-target in blind review

1,847Companies

38,813Contacts tracked

9,682Verified emails

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The 25 largest oil heating equipment manufacturers worldwide

Ranked by team size

Top 25 of 1,847 oil heating equipment manufacturers worldwide, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to oil heating equipment manufacturers: 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	Groupe Atlantic	Indirect evidence	La Roche-sur- Yon, FranceHQ checked Sep 30, 2026	10001+	3,403 contacts →
	Indirect evidence “Acteur majeur du confort thermique, le GROUPE ATLANTIC conçoit, fabrique et commercialise des solutions de chauffage, climatisation, ventilation et production d’eau chaude…” Source: RevenueBase Database · checked Sep 30, 2026
2	Vaillant Group	Indirect evidence	Remscheid, GermanyHQ checked Sep 30, 2026	10001+	3,014 contacts →
	Indirect evidence “Our corporate vision shapes everything we do and inspires our employees every day.” Source: RevenueBase Database · checked Sep 30, 2026
3	Thermax Babcock & Wilcox Energy Solutions Limited	Partial evidence	Pune, IndiaHQ checked Sep 30, 2026	1,001-5,000	843 contacts →
	Partial evidence “Thermax Babcock & Wilcox Energy Solutions (TBWES), a wholly-owned subsidiary of Thermax Limited, provides equipment and complete solutions for generating steam for process and…” Source: RevenueBase Database · checked Sep 30, 2026
4	Riello	Indirect evidence	Legnago, ItalyHQ checked Sep 30, 2026	1,001-5,000	690 contacts →
	Indirect evidence “For over 100 years, Riello’s Energy For Life has been at the core of its industrial policy, guiding the company in the development of solutions designed to provide comfort and…” Source: RevenueBase Database · checked Sep 30, 2026
5	Bradford White	Strong evidence	Ambler, PA, United StatesHQ checked Sep 30, 2026	1,001-5,000	689 contacts →
	Strong evidence “Bradford White Corporation is an American-owned, full-line manufacturer of residential, commercial, and industrial products for water heating, space heating, combination heating…” Source: RevenueBase Database · checked Sep 30, 2026
6	Cleaver-Brooks	Partial evidence	Thomasville, GA, United StatesHQ checked Sep 30, 2026	1,001-5,000	631 contacts →
	Partial evidence “Cleaver-Brooks, Inc, a manufacturer of boiler room products for over 90 years, is the only single source manufacturer and supplier of boiler room products including boilers…” Source: RevenueBase Database · checked Sep 30, 2026
7	Alarko Carrier Sanayi VE Ticaret A.Ş	Indirect evidence	Gebze, TürkiyeHQ checked Sep 30, 2026	501-1,000	463 contacts →
	Indirect evidence “Since its establishment in 1954 Alarko Sanayi ve Ticaret A.Ş.” Source: RevenueBase Database · checked Sep 30, 2026
8	Baymak BDR Thermea Group	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 30, 2026	501-1,000	439 contacts →
	Indirect evidence “1969 yılında faaliyetlerine başlayan ve 2013 yılı itibarıyla iklimlendirme sektöründe Avrupa’nın ilk üç şirketi arasında yer alan BDR Thermea Group bünyesine katılan Baymak…” Source: RevenueBase Database · checked Sep 30, 2026
9	Ferroli Group	Partial evidence	San Bonifacio, ItalyHQ checked Sep 30, 2026	1,001-5,000	418 contacts →
	Partial 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 30, 2026
10	Babcock Wanson International	Indirect evidence	Nerac, FranceHQ checked Sep 30, 2026	501-1,000	388 contacts →
	Indirect evidence “BABCOCK WANSON offers a complete range of products and services for industrial boiler house.” Source: RevenueBase Database · checked Sep 30, 2026
11	Remeha	Indirect evidence	Apeldoorn, NetherlandsHQ checked Sep 30, 2026	201-500	388 contacts →
	Indirect evidence “Remeha, the comfort innovators Remeha ontwikkelt al sinds 1935 voortdurend innovatieve en energiezuinige producten voor warmte en warm water, zowel voor woningen als utiliteit.” Source: RevenueBase Database · checked Sep 30, 2026
12	Immergas S.P.A	Indirect evidence	Reggio Emilia, ItalyHQ checked Sep 30, 2026	501-1,000	374 contacts →
	Indirect evidence “Produciamo oltre 300 mila caldaie l’anno e commercializziamo apparecchi per riscaldamento e raffrescamento domestico in 50 paesi di tutto il Mondo, con dodici filiali commerciali…” Source: RevenueBase Database · checked Sep 30, 2026
13	Lochinvar, LLC	Partial evidence	Lebanon, TN, IndiaHQ checked Sep 30, 2026	201-500	340 contacts →
	Partial evidence “Lochinvar, LLC is a leading manufacturer of high-efficiency water heaters, boilers, pool heaters and custom pre-piped packaged systems.” Source: RevenueBase Database · checked Sep 30, 2026
14	Purmo Group	Indirect evidence	Helsinki, FinlandHQ checked Sep 30, 2026	1,001-5,000	326 contacts →
	Indirect evidence “We are Purmo Group, leader in sustainable indoor climate comfort solutions.” Source: RevenueBase Database · checked Sep 30, 2026
15	Giacomini S.P.A	Indirect evidence	San Maurizio D'opaglio, ItalyHQ checked Sep 30, 2026	501-1,000	311 contacts →
	Indirect evidence “True Made in Italy.” Source: RevenueBase Database · checked Sep 30, 2026
16	Rinnai Australia	Indirect evidence	Braeside, AustraliaHQ checked Sep 30, 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 30, 2026
17	Ideal Heating	Strong evidence	Hull, United KingdomHQ checked Sep 30, 2026	501-1,000	286 contacts →
	Strong evidence “The UK’s leading heating manufacturer, providing reliable, sustainable warmth through boilers, heat pumps and controls Rated Excellent on Trustpilot Award-winning Keeping Homes…” Source: RevenueBase Database · checked Sep 30, 2026
18	Weil-Mclain	Strong evidence	Burr Ridge, IL, United StatesHQ checked Sep 30, 2026	501-1,000	279 contacts →
	Strong evidence “Weil-McLain® is a leading North American designer and manufacturer of hydronic comfort heating systems for residential, commercial and institutional buildings since 1881.” Source: RevenueBase Database · checked Sep 30, 2026
19	Sermeta	Partial evidence	Morlaix, FranceHQ checked Sep 30, 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 30, 2026
20	Demirdöküm A.Ş	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 30, 2026	501-1,000	248 contacts →
	Indirect evidence “Isıtma, su ısıtma ve iklimlendirme sektörlerinde faaliyet gösteren DemirDöküm 1954 yılında İstanbul’da kurulmuştur.” Source: RevenueBase Database · checked Sep 30, 2026
21	Raypak	Partial evidence	Oxnard, United StatesHQ checked Sep 30, 2026	501-1,000	242 contacts →
	Partial evidence “For over 70 years, Raypak has been the world's leading manufacturer of copper finned boilers and heaters.” Source: RevenueBase Database · checked Sep 30, 2026
22	Irsap SPA	Partial evidence	Arquà Polesine, ItalyHQ checked Sep 30, 2026	1,001-5,000	224 contacts →
	Partial evidence “Leading company in Europe in the production of radiators for domestic heating, air exchange systems and home automation applied to heating.” Source: RevenueBase Database · checked Sep 30, 2026
23	Mimsan Grup	Indirect evidence	Malatya, TürkiyeHQ checked Sep 30, 2026	501-1,000	215 contacts →
	Indirect evidence “Mimsan Grup; Yakma ve Enerji Sistemleri Üreten 41 Yıllık Bir Deneyime Sahip Endüstri Firmasıdır.” Source: RevenueBase Database · checked Sep 30, 2026
24	Weishaupt France	Indirect evidence	Colmar, FranceHQ checked Sep 30, 2026	201-500	202 contacts →
	Indirect evidence “Le Groupe Weishaupt Avec près de 3.400 collaborateurs, le Groupe Weishaupt compte parmi les entreprises leader dans le domaine des brûleurs, chaudières à condensation, pompes à…” Source: RevenueBase Database · checked Sep 30, 2026
25	Dimplex UK	Partial evidence	Southampton, United KingdomHQ checked Sep 30, 2026	501-1,000	201 contacts →
	Partial evidence “For over 75 years, Dimplex has been the trusted name for electric heating.” Source: RevenueBase Database · checked Sep 30, 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: oil heating equipment manufacturers. 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 oil heating equipment manufacturers.
Partial evidence: Its own public description names part of oil heating equipment manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil heating equipment manufacturers. 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 1,847 oil heating equipment manufacturers worldwide

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Oil heating equipment manufacturers worldwide at a glance

As of Sep 30, 2026

24.9%Verified-email coverage

21.0Average contacts per company

11-50Median size (employees)

1.1%Largest-city concentration · Istanbul

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

649

11-50

610

51-200

335

201-500

114

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 oil heating equipment manufacturers, 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 oil heating equipment manufacturers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “oil heating equipment manufacturers”. 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 oil heating equipment manufacturers), 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 oil heating equipment manufacturers, 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, 9,682 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 30, 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.

Oil heating equipment manufacturers by location

14 lists · largest first

Every Oil heating equipment manufacturers 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 oil heating equipment manufacturers, 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 oil heating equipment manufacturers are there worldwide?

RevenueBase identified 1,847 oil heating equipment manufacturers 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?

Groupe Atlantic, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most oil heating equipment manufacturers?

The United States leads with 189 companies, followed by Italy (170) and the United Kingdom (144). Every oil heating equipment manufacturers list by country and city is linked on this page.

Which city has the most oil heating equipment manufacturers?

Istanbul leads with 20 headquartered companies, followed by Ahmedabad (13) and Ankara (12).

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 9,682 verified decision-maker contacts tracked across these 1,847 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 30, 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.