Company lists · Data refreshed September 2026

Top 25 Oil boiler manufacturers worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 1,669 companies tracked

RevenueBase identified 1,669 oil boiler manufacturers worldwide as of September 2026 and tracks 20,598 professional contacts across them, including 5,940 with verified work emails and 0 with mobile numbers. The United Kingdom is the largest market and London the largest hub.

This list covers oil boiler 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 17, 2026. Country and city lists for oil boiler 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 17, 2026 86% judged on-target in blind review

1,669Companies

20,598Contacts tracked

5,940Verified emails

0Mobile numbers

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The 25 largest oil boiler manufacturers worldwide

Ranked by team size

Top 25 of 1,669 oil boiler manufacturers worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to oil boiler 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	Bradford White	Partial evidence	Ambler, PA, United StatesHQ checked Sep 17, 2026	1,001-5,000	689 contacts →
	Partial 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 17, 2026
2	Cleaver-Brooks	Strong evidence	Thomasville, GA, United StatesHQ checked Sep 17, 2026	1,001-5,000	631 contacts →
	Strong 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 17, 2026
3	Alarko Carrier Sanayi VE Ticaret A.Ş	Indirect evidence	Gebze, TürkiyeHQ checked Sep 17, 2026	501-1,000	463 contacts →
	Indirect evidence “Since its establishment in 1954 Alarko Sanayi ve Ticaret A.Ş.” Source: RevenueBase Database · checked Sep 17, 2026
4	Baymak BDR Thermea Group	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 17, 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 17, 2026
5	Ferroli Group	Indirect evidence	San Bonifacio, ItalyHQ checked Sep 17, 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 17, 2026
6	Babcock Wanson International	Partial evidence	Nerac, FranceHQ checked Sep 17, 2026	501-1,000	388 contacts →
	Partial evidence “BABCOCK WANSON offers a complete range of products and services for industrial boiler house.” Source: RevenueBase Database · checked Sep 17, 2026
7	Remeha	Indirect evidence	Apeldoorn, NetherlandsHQ checked Sep 17, 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 17, 2026
8	Immergas S.P.A	Indirect evidence	Reggio Emilia, ItalyHQ checked Sep 17, 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 17, 2026
9	Ideal Heating	Strong evidence	Hull, United KingdomHQ checked Sep 17, 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 17, 2026
10	Weil-Mclain	Partial evidence	Burr Ridge, IL, United StatesHQ checked Sep 17, 2026	501-1,000	279 contacts →
	Partial 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 17, 2026
11	Sermeta	Strong evidence	Morlaix, FranceHQ checked Sep 17, 2026	501-1,000	256 contacts →
	Strong evidence “Sermeta is the world leading manufacturer of stainless steel heat exchanger for gas condensing boilers.” Source: RevenueBase Database · checked Sep 17, 2026
12	Raypak	Strong evidence	Oxnard, United StatesHQ checked Sep 17, 2026	501-1,000	242 contacts →
	Strong evidence “For over 70 years, Raypak has been the world's leading manufacturer of copper finned boilers and heaters.” Source: RevenueBase Database · checked Sep 17, 2026
13	Mimsan Grup	Indirect evidence	Malatya, TürkiyeHQ checked Sep 17, 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 17, 2026
14	Weishaupt France	Indirect evidence	Colmar, FranceHQ checked Sep 17, 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 17, 2026
15	Intergas Verwarming B.V	Indirect evidence	Coevorden, NetherlandsHQ checked Sep 17, 2026	201-500	199 contacts →
	Indirect evidence “Intergas: an introduction.” Source: RevenueBase Database · checked Sep 17, 2026
16	Cleaver-Brooks Sales And Service	Partial evidence	Dallas, TX, United StatesHQ checked Sep 17, 2026	201-500	193 contacts →
	Partial evidence “Cleaver-Brooks Sales and Service, is one of the most innovative and fastest growing boiler services companies in the United States.” Source: RevenueBase Database · checked Sep 17, 2026
17	R.F. Macdonald CO	Indirect evidence	Hayward, CA, United StatesHQ checked Sep 17, 2026	201-500	190 contacts →
	Indirect evidence “R.F.” Source: RevenueBase Database · checked Sep 17, 2026
18	Baxi Italia	Indirect evidence	Bassano Del Grappa, ItalyHQ checked Sep 17, 2026	501-1,000	189 contacts →
	Indirect evidence “Nata negli anni 1925 come produttore di prodotti smaltati, dagli anni 70 Baxi è entrata nel settore HVAC con apparecchi domestici per il riscaldamento e la climatizzazione.” Source: RevenueBase Database · checked Sep 17, 2026
19	Fulton	Partial evidence	Pulaski, NY, United StatesHQ checked Sep 17, 2026	501-1,000	171 contacts →
	Partial evidence “Fulton specializes in custom engineered industrial and commercial heating systems featuring steam boilers, hot water and hydronic boilers, thermal fluid heaters, and a full range…” Source: RevenueBase Database · checked Sep 17, 2026
20	Victory Energy Operations, LLC	Partial evidence	Collinsville, OK, United StatesHQ checked Sep 17, 2026	201-500	162 contacts →
	Partial evidence “Victory Energy Operations, LLC is a leading, single-source (concept to completion) supplier of custom-engineered industrial boiler systems and advanced technologies worldwide…” Source: RevenueBase Database · checked Sep 17, 2026
21	Emas Makina Sanayi A.Ş	Indirect evidence	Esentepe, TürkiyeHQ checked Sep 17, 2026	201-500	151 contacts →
	Indirect evidence “Elginkan Topluluğu şirketleri arasında yer alan Emas Makina Sanayi A.Ş, 30 yılı aşkın süredir E.C.A.” Source: RevenueBase Database · checked Sep 17, 2026
22	Warmhaus	Indirect evidence	Bursa, TürkiyeHQ checked Sep 17, 2026	201-500	142 contacts →
	Indirect evidence “1996 senesinde bir Beyçelik Holding iştiraki olarak kurulan Warmhaus, iklimlendirme alanındaki 20 yılı aşkın tecrübesi ile panel radyatör, kombi, şofben ve duvar tipi yoğuşmalı…” Source: RevenueBase Database · checked Sep 17, 2026
23	Swale Heating Part Of Sureserve	Partial evidence	Sittingbourne, United KingdomHQ checked Sep 17, 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 17, 2026
24	WARE	Partial evidence	Louisville, KY, United StatesHQ checked Sep 17, 2026	51-200	131 contacts →
	Partial evidence “WARE is a commercial and industrial, boiler rental and service company.” Source: RevenueBase Database · checked Sep 17, 2026
25	Laars Heating Systems	Indirect evidence	Rochester, NH, United StatesHQ checked Sep 17, 2026	201-500	126 contacts →
	Indirect evidence “Founded in 1948, LAARS serves a diverse base of customers located in many countries across the globe.” Source: RevenueBase Database · checked Sep 17, 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 boiler 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 boiler manufacturers.
Partial evidence: Its own public description names part of oil boiler manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil boiler 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 1,669 oil boiler manufacturers worldwide

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Oil boiler manufacturers worldwide at a glance

As of Sep 17, 2026

28.8%Verified-email coverage

12.3Average contacts per company

1-10Median size (employees)

1.4%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

851

11-50

502

51-200

190

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 boiler 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: 13 countries, largest first: the United Kingdom, the United States, France, Italy, India, Türkiye, Spain, Canada, the Netherlands, Belgium and 3 more. Country and city lists for oil boiler manufacturers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “oil boiler 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 boiler 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 boiler 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, 5,940 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 17, 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 boiler manufacturers by location

13 lists · largest first

Every Oil boiler 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 boiler 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 boiler manufacturers are there worldwide?

RevenueBase identified 1,669 oil boiler 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?

Bradford White, headquartered in Ambler, tops this list with the largest team on record.

Which country has the most oil boiler manufacturers?

The United Kingdom leads with 414 companies, followed by the United States (300) and France (193). Every oil boiler manufacturers list by country and city is linked on this page.

Which city has the most oil boiler manufacturers?

London leads with 23 headquartered companies, followed by Pune (15) and Ahmedabad (11).

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 5,940 verified decision-maker contacts tracked across these 1,669 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 17, 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.