Company lists · Data refreshed September 2026

Top 25 Gas boiler manufacturers worldwide

RevenueBase identified 641 gas boiler manufacturers worldwide as of September 2026 and tracks 20,652 professional contacts across them, including 6,011 with verified work emails and 0 with mobile numbers. The United Kingdom is the largest market and Istanbul the largest hub.

This list covers gas 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 16, 2026. Country and city lists for gas 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 16, 2026 86% judged on-target in blind review
641Companies
20,652Contacts tracked
6,011Verified emails
0Mobile numbers
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The 25 largest gas boiler manufacturers worldwide

Ranked by team size
Top 25 of 641 gas boiler manufacturers worldwide, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to gas 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceRemscheid, GermanyHQ checked Sep 16, 202610001+3,014 contacts →

Indirect evidence

“Our corporate vision shapes everything we do and inspires our employees every day.”

Source: RevenueBase Database · checked Sep 16, 2026
2Partial evidenceAmbler, PA, United StatesHQ checked Sep 16, 20261,001-5,000689 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 16, 2026
3Strong evidenceThomasville, GA, United StatesHQ checked Sep 16, 20261,001-5,000631 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 16, 2026
4Indirect evidenceGebze, TürkiyeHQ checked Sep 16, 2026501-1,000463 contacts →

Indirect evidence

“Since its establishment in 1954 Alarko Sanayi ve Ticaret A.Ş.”

Source: RevenueBase Database · checked Sep 16, 2026
5Indirect evidenceİstanbul, TürkiyeHQ checked Sep 16, 2026501-1,000439 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 16, 2026
6Indirect evidenceSan Bonifacio, ItalyHQ checked Sep 16, 20261,001-5,000418 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 16, 2026
7Partial evidenceNerac, FranceHQ checked Sep 16, 2026501-1,000388 contacts →

Partial evidence

“BABCOCK WANSON offers a complete range of products and services for industrial boiler house.”

Source: RevenueBase Database · checked Sep 16, 2026
8Indirect evidenceApeldoorn, NetherlandsHQ checked Sep 16, 2026201-500388 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 16, 2026
9Indirect evidenceReggio Emilia, ItalyHQ checked Sep 16, 2026501-1,000374 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 16, 2026
10Strong evidenceLebanon, TN, IndiaHQ checked Sep 16, 2026201-500340 contacts →

Strong 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 16, 2026
11Strong evidenceHull, United KingdomHQ checked Sep 16, 2026501-1,000286 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 16, 2026
12Partial evidenceBurr Ridge, IL, United StatesHQ checked Sep 16, 2026501-1,000279 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 16, 2026
13Strong evidenceMorlaix, FranceHQ checked Sep 16, 2026501-1,000256 contacts →

Strong evidence

“Sermeta is the world leading manufacturer of stainless steel heat exchanger for gas condensing boilers.”

Source: RevenueBase Database · checked Sep 16, 2026
14Strong evidenceOxnard, United StatesHQ checked Sep 16, 2026501-1,000242 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 16, 2026
15Indirect evidenceCoevorden, NetherlandsHQ checked Sep 16, 2026201-500199 contacts →

Indirect evidence

“Intergas: an introduction.”

Source: RevenueBase Database · checked Sep 16, 2026
16Indirect evidenceBassano Del Grappa, ItalyHQ checked Sep 16, 2026501-1,000189 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 16, 2026
17Partial evidencePulaski, NY, United StatesHQ checked Sep 16, 2026501-1,000171 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 16, 2026
18Indirect evidenceEsentepe, TürkiyeHQ checked Sep 16, 2026201-500151 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 16, 2026
19Indirect evidenceWetzlar, GermanyHQ checked Sep 16, 20261,001-5,000143 contacts →

Indirect evidence

“Die Marke Buderus ist Teil der Bosch Thermotechnik GmbH und steht seit 1731 für Spitzenprodukte im Bereich Heizsysteme Ob regenerativ oder klassisch betrieben – unsere Heizsysteme…”

Source: RevenueBase Database · checked Sep 16, 2026
20Indirect evidenceBursa, TürkiyeHQ checked Sep 16, 2026201-500142 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 16, 2026
21Partial evidenceBelleville, IL, United StatesHQ checked Sep 16, 2026201-500126 contacts →

Partial evidence

“Empire Comfort Systems: A Company Perspective · Family Owned Since 1932 · A Full Line of Gas-Fired Products for the Independent Dealer · Made in the USA Empire – a Family-Owned…”

Source: RevenueBase Database · checked Sep 16, 2026
22Indirect evidenceRochester, NH, United StatesHQ checked Sep 16, 2026201-500126 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 16, 2026
23Indirect evidenceUtica, United StatesHQ checked Sep 16, 2026201-500126 contacts →

Indirect evidence

“ECR International, Inc.”

Source: RevenueBase Database · checked Sep 16, 2026
24Indirect evidenceBlauvelt, NY, United StatesHQ checked Sep 16, 202651-200104 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 16, 2026
25Indirect evidenceSt-augustin-de-desmaures, QC, CanadaHQ checked Sep 16, 2026201-500102 contacts →

Indirect evidence

“SBI specializes in the design and fabrication of residential heating appliances using various types of fuels such as wood, wood pellets, and biomass.”

Source: RevenueBase Database · checked Sep 16, 2026

Showing 25 of 641 gas boiler manufacturers worldwide

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Gas boiler manufacturers worldwide at a glance

As of Sep 16, 2026
29.1%Verified-email coverage
32.2Average contacts per company
11-50Median size (employees)
2.3%Largest-city concentration · Istanbul
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
206
11-50
184
51-200
163
201-500
40
501-1,000
25
1,001-5,000
10
5,001-10,000
4
10001+
3

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 gas 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
10 countries, largest first: the United Kingdom, the United States, Italy, Türkiye, India, France, Canada, the Netherlands, Spain, Germany. Country and city lists for gas boiler manufacturers are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “gas 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 gas 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 gas 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, 6,011 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 16, 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.

Gas boiler manufacturers by location

10 lists · largest first

Every Gas 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 gas 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 gas boiler manufacturers are there worldwide?

RevenueBase identified 641 gas 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?

Vaillant Group, headquartered in Remscheid, tops this list with the largest team on record.

Which country has the most gas boiler manufacturers?

The United Kingdom leads with 109 companies, followed by the United States (99) and Italy (90). Every gas boiler manufacturers list by country and city is linked on this page.

Which city has the most gas boiler manufacturers?

Istanbul leads with 15 headquartered companies, followed by Ahmedabad (11) and Pune (9).

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 6,011 verified decision-maker contacts tracked across these 641 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 16, 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.