Company lists · Data refreshed September 2026

Top 25 Steam boiler manufacturers based in the United Kingdom

Name: Steam boiler manufacturers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 80 companies tracked

RevenueBase identified 80 steam boiler manufacturers headquartered in the United Kingdom as of September 2026 and tracks 3,319 professional contacts across them, including 482 with verified work emails. London is the largest hub.

This list covers steam boiler manufacturers headquartered in the United Kingdom, 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 18, 2026.

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 18, 2026 86% judged on-target in blind review

80Companies

3,319Contacts tracked

482Verified emails

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The 25 largest steam boiler manufacturers based in the United Kingdom

Ranked by team size

Top 25 of 80 steam boiler manufacturers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to steam 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	Spirax Sarco	Partial evidence	Cheltenham, United KingdomHQ checked Sep 18, 2026	5,001-10,000	1,669 contacts →
	Partial evidence “Expertise \| Solutions \| Sustainability A FTSE-100 company, Spirax Sarco is the world's leading provider of steam system solutions.” Source: RevenueBase Database · checked Sep 18, 2026
2	Cochran	Partial evidence	Annan, United KingdomHQ checked Sep 18, 2026	201-500	110 contacts →
	Partial evidence “Cochran has been embedded within industrial boiler manufacturing since 1878.” Source: RevenueBase Database · checked Sep 18, 2026
3	Byworth Boilers Limited	Partial evidence	Keighley, United KingdomHQ checked Sep 18, 2026	51-200	96 contacts →
	Partial evidence “Your industrial boiler is at the heart of your operations.” Source: RevenueBase Database · checked Sep 18, 2026
4	JBC	Partial evidence	Normanton, United KingdomHQ checked Sep 18, 2026	51-200	86 contacts →
	Partial evidence “JBC Industrial Services is the leading name in Industrial Boiler and Burner service, maintenance, and repair.” Source: RevenueBase Database · checked Sep 18, 2026
5	Green's	Partial evidence	Wakefield, United KingdomHQ checked Sep 18, 2026	51-200	72 contacts →
	Partial evidence “Green’s is one of Europe’s largest providers of boiler pressure part equipment.” Source: RevenueBase Database · checked Sep 18, 2026
6	Intergas Heating LTD	Strong evidence	Kidderminster, United KingdomHQ checked Sep 18, 2026	201-500	61 contacts →
	Strong evidence “We’re Dutch, we manufacture ultra-efficient domestic boilers and we want to make the world a better place for all of us.” Source: RevenueBase Database · checked Sep 18, 2026
7	James Ramsay	Indirect evidence	Glasgow, United KingdomHQ checked Sep 18, 2026	51-200	54 contacts →
	Indirect evidence “Heating - Pipework - Process - Maintenance.” Source: RevenueBase Database · checked Sep 18, 2026
8	Dunphy Combustion Limited	Strong evidence	Rochdale, United KingdomHQ checked Sep 18, 2026	51-200	53 contacts →
	Strong evidence “Dunphy Combustion Ltd design, manufacture, install and maintain a range of combustion equipment, digital control solutions and turnkey prefabricated, packaged boiler houses.” Source: RevenueBase Database · checked Sep 18, 2026
9	Lochinvar, UK	Strong evidence	Banbury, United KingdomHQ checked Sep 18, 2026	11-50	40 contacts →
	Strong evidence “Lochinvar designs, manufactures and distributes a comprehensive range of high efficiency gas fired water heaters and boilers for commercial and industrial applications.” Source: RevenueBase Database · checked Sep 18, 2026
10	Fulton Boiler Works GB Limited	Strong evidence	Bristol, United KingdomHQ checked Sep 18, 2026	51-200	38 contacts →
	Strong evidence “Fulton Ltd specialises in the design and manufacture of steam, hot water, thermal fluid boilers, packaged plant rooms and skid-mounted systems for industrial, commercial and…” Source: RevenueBase Database · checked Sep 18, 2026
11	Tissot Industry UK	Indirect evidence	Croydon, United KingdomHQ checked Sep 18, 2026	51-200	38 contacts →
	Indirect evidence “TISSOT Industrie \| Tailored industrial excellence since 1942.” Source: RevenueBase Database · checked Sep 18, 2026
12	Babcock Wanson UK LTD	Partial evidence	Borehamwood, United KingdomHQ checked Sep 18, 2026	51-200	36 contacts →
	Partial evidence “Babcock Wanson offers a complete range of products and services for your boiler house.” Source: RevenueBase Database · checked Sep 18, 2026
13	Mcquillan Boiler Services LTD	Strong evidence	Rochdale, United KingdomHQ checked Sep 18, 2026	51-200	18 contacts →
	Strong evidence “McQuillan Boiler Services was established in 1989 with the intention of offering our loyal customers reliable support and servicing with both their industrial and commercial steam…” Source: RevenueBase Database · checked Sep 18, 2026
14	Combat Heating Solutions LTD	Indirect evidence	Wednesbury, United KingdomHQ checked Sep 18, 2026	51-200	13 contacts →
	Indirect evidence “Combat Heating Solutions has been an established name in the commercial heating industry for more than 50 years.” Source: RevenueBase Database · checked Sep 18, 2026
15	Thorne International Boiler Services LTD	Partial evidence	Wolverhampton, United KingdomHQ checked Sep 18, 2026	11-50	13 contacts →
	Partial evidence “Thorne International Boiler Services Ltd design and build fire tube, waste heat and water tube boilers to suit the project brief.” Source: RevenueBase Database · checked Sep 18, 2026
16	Steam Plant Engineering	Strong evidence	Halesowen, United KingdomHQ checked Sep 18, 2026	11-50	12 contacts →
	Strong evidence “Steam Plant Engineering Ltd are independent steam specialists offering; boiler repair, installation, troubleshooting and inspection offering solutions for everything from a…” Source: RevenueBase Database · checked Sep 18, 2026
17	Proctor Process Plant LTD	Indirect evidence	Burnley, United KingdomHQ checked Sep 18, 2026	11-50	12 contacts →
	Indirect evidence “Established in 1983, Proctor Process Plant is a family-owned business who operate in a worldwide market, with a proven reputation for providing our customers with the highest…” Source: RevenueBase Database · checked Sep 18, 2026
18	AIC Heating UK	Partial evidence	Fife Ky11 1hz, United KingdomHQ checked Sep 18, 2026	51-200	9 contacts →
	Partial evidence “AIC (Advanced Industrial Components) was founded in 2001 and rapidly became an internationally recognised reliable specialist in the design, engineering and manufacture of…” Source: RevenueBase Database · checked Sep 18, 2026
19	Certuss UK	Strong evidence	Birmingham, United KingdomHQ checked Sep 18, 2026	11-50	9 contacts →
	Strong evidence “When Hans-Joachim Schröder founded his company, CERTUSS Wärmetechnik GmbH, in 1957, his primary goals were to manufacture reliable, low-noise steam generators, easy to maintain…” Source: RevenueBase Database · checked Sep 18, 2026
20	Industrial Boilerhouse Supplies LTD	Partial evidence	Fareham, United KingdomHQ checked Sep 18, 2026	11-50	9 contacts →
	Partial evidence “Formed in 1993, Industrial Boilerhouse Supplies Ltd.” Source: RevenueBase Database · checked Sep 18, 2026
21	Flomar LTD	Partial evidence	Fleckney, United KingdomHQ checked Sep 18, 2026	11-50	9 contacts →
	Partial evidence “Founded in 1982, Flomar Ltd was created to meet the demand for knowledge in steam production.” Source: RevenueBase Database · checked Sep 18, 2026
22	Ranheat Engineering Limited	Strong evidence	Northamptonshire, United KingdomHQ checked Sep 18, 2026	11-50	8 contacts →
	Strong evidence “Ranheat design, manufacture and install a complete range of industrial wood waste burners and boilers systems.” Source: RevenueBase Database · checked Sep 18, 2026
23	Boiler & Valve Engineering	Strong evidence	Nairn, United KingdomHQ checked Sep 18, 2026	11-50	7 contacts →
	Strong evidence “Boiler & Valve Engineering offers comprehensive steam engineering solutions, managing the entire steam and condensate loop.” Source: RevenueBase Database · checked Sep 18, 2026
24	Industrial Boiler Services UK LTD	Partial evidence	Gt Whelnetham, United KingdomHQ checked Sep 18, 2026	11-50	6 contacts →
	Partial evidence “Here at Industrial Boiler Services (UK) Ltd we provide a comprehensive range of services encompassing temporary hire solutions, installation, operational support, maintenance and…” Source: RevenueBase Database · checked Sep 18, 2026
25	Clayton Thermal Products LTD	Partial evidence	Runcorn, United KingdomHQ checked Sep 18, 2026	11-50	6 contacts →
	Partial evidence “Clayton Steam System Solutions is an international group with a reputation for technological advance and innovation.” Source: RevenueBase Database · checked Sep 18, 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: steam 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 steam boiler manufacturers.
Partial evidence: Its own public description names part of steam boiler manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name steam 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 80 steam boiler manufacturers based in the United Kingdom

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Steam boiler manufacturers based in the United Kingdom at a glance

As of Sep 18, 2026

14.5%Verified-email coverage

41.5Average contacts per company

11-50Median size (employees)

5.0%Largest-city concentration · London

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 80 companies.

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 steam 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.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “steam 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 steam 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 steam boiler manufacturers, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
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, 482 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 18, 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.

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 steam 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 steam boiler manufacturers are there based in the United Kingdom?

RevenueBase identified 80 steam boiler manufacturers headquartered in the United Kingdom 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?

Spirax Sarco, headquartered in Cheltenham, tops this list with the largest team on record.

Which city has the most steam boiler manufacturers?

London leads with 4 headquartered companies, followed by Wakefield (3) and Annan (2).

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 482 verified decision-maker contacts tracked across these 80 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 18, 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.