Company lists · Data refreshed September 2026

Top 25 Electric heater manufacturers based in the United Kingdom

Name: Electric heater 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 30, 2026 185 companies tracked

RevenueBase identified 185 electric heater manufacturers headquartered in the United Kingdom as of September 2026 and tracks 2,699 professional contacts across them, including 763 with verified work emails. London is the largest hub.

This list covers electric heater 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 30, 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 30, 2026 86% judged on-target in blind review

185Companies

2,699Contacts tracked

763Verified emails

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The 25 largest electric heater manufacturers based in the United Kingdom

Ranked by team size

Top 25 of 185 electric heater manufacturers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to electric heater 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	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
2	Dimplex UK	Strong evidence	Southampton, United KingdomHQ checked Sep 30, 2026	501-1,000	201 contacts →
	Strong evidence “For over 75 years, Dimplex has been the trusted name for electric heating.” Source: RevenueBase Database · checked Sep 30, 2026
3	Exheat	Strong evidence	Watton, United KingdomHQ checked Sep 30, 2026	51-200	142 contacts →
	Strong evidence “At EXHEAT, we design and manufacture electric process heaters and control solutions.” Source: RevenueBase Database · checked Sep 30, 2026
4	Rointe Heating	Strong evidence	Peterborough, United KingdomHQ checked Sep 30, 2026	51-200	83 contacts →
	Strong evidence “With over 35 years of experience, and as Europe's leading manufacturer of electric heating, Rointe is ideally placed to help our customers choose the right heating system, at the…” Source: RevenueBase Database · checked Sep 30, 2026
5	Stelrad LTD	Partial evidence	Mexborough, United KingdomHQ checked Sep 30, 2026	201-500	75 contacts →
	Partial evidence “Celebrating our 90th anniversary, Stelrad is the UK market leader in central heating radiators, providing the most extensive selection of radiators in various sizes compared to…” Source: RevenueBase Database · checked Sep 30, 2026
6	Hamworthy Heating LTD	Strong evidence	Hull, United KingdomHQ checked Sep 30, 2026	51-200	45 contacts →
	Strong evidence “Hamworthy Heating is a British manufacturer and supplier of commercial heating and hot water products.” Source: RevenueBase Database · checked Sep 30, 2026
7	Elecro Engineering LTD	Strong evidence	Stevenage, United KingdomHQ checked Sep 30, 2026	11-50	45 contacts →
	Strong evidence “Elecro Engineering are considered one of the leading international manufacturers and specialists in the field of swimming pool water heating.” Source: RevenueBase Database · checked Sep 30, 2026
8	Vokera By Riello	Partial evidence	Hertfordshire, United KingdomHQ checked Sep 30, 2026	11-50	45 contacts →
	Partial evidence “For over 40 years, Vokèra has been a trusted name in home heating across the UK and Ireland, delivering reliable, energy efficient solutions for domestic and light commercial…” Source: RevenueBase Database · checked Sep 30, 2026
9	GDC Group LTD	Partial evidence	Southampton, United KingdomHQ checked Sep 30, 2026	51-200	43 contacts →
	Partial evidence “GDC is the holding company for some of the best known brands in the heating industry, including Dimplex, Creda NOBO, Faber, Robinson Willey, Valor, Wonderfire, Glen, Unidare…” Source: RevenueBase Database · checked Sep 30, 2026
10	Lochinvar, UK	Strong evidence	Banbury, United KingdomHQ checked Sep 30, 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 30, 2026
11	Smith's EP UK	Partial evidence	Chelmsford, United KingdomHQ checked Sep 30, 2026	51-200	39 contacts →
	Partial evidence “Founded in 1991, Smith’s EP UK has grown organically to become the UK’s leading supplier of hydronic fan convector products, providing versatile, energy efficient heating…” Source: RevenueBase Database · checked Sep 30, 2026
12	SPC	Strong evidence	Leicester, United KingdomHQ checked Sep 30, 2026	51-200	39 contacts →
	Strong evidence “SPC is a British manufacturer specialising in supplying heating and cooling solutions.” Source: RevenueBase Database · checked Sep 30, 2026
13	Warmflow Engineering Co. Limited	Indirect evidence	Lisburn, United KingdomHQ checked Sep 30, 2026	51-200	38 contacts →
	Indirect evidence “Warmflow specialise in design, manufacturing, fabrication, sub assembly and kitting solutions.” Source: RevenueBase Database · checked Sep 30, 2026
14	Backer Heatrod LTD	Strong evidence	Bolton, United KingdomHQ checked Sep 30, 2026	11-50	36 contacts →
	Strong evidence “Backer Heatrod manufacture both domestic and industrial electric heating products and solutions.” Source: RevenueBase Database · checked Sep 30, 2026
15	Atag Heating Technology UK Limited	Indirect evidence	Dunfermline, United KingdomHQ checked Sep 30, 2026	51-200	31 contacts →
	Indirect evidence “BUILT TO LAST ATAG truly is a unique company.” Source: RevenueBase Database · checked Sep 30, 2026
16	Trust Electric Heating	Strong evidence	Leeds, United KingdomHQ checked Sep 30, 2026	11-50	29 contacts →
	Strong evidence “Trust Electric Heating is an industry-leading, electric heating company providing innovative, affordable and sustainable heating solutions to homes and businesses across the UK.” Source: RevenueBase Database · checked Sep 30, 2026
17	Holroyd Components LTD	Partial evidence	Saffron Walden, United KingdomHQ checked Sep 30, 2026	51-200	27 contacts →
	Partial evidence “Holroyd are market leaders in specialist bespoke heating products, using the latest heating technology and solutions to solve complex industry challenges.” Source: RevenueBase Database · checked Sep 30, 2026
18	Myson UK	Indirect evidence	Gateshead, United KingdomHQ checked Sep 30, 2026	201-500	25 contacts →
	Indirect evidence “Who Are we?” Source: RevenueBase Database · checked Sep 30, 2026
19	Thermaglow Limited	Strong evidence	Great Yarmouth, United KingdomHQ checked Sep 30, 2026	51-200	24 contacts →
	Strong evidence “Thermaglow Limited is a UK-based manufacturer specialising in high-quality electric heating elements and advanced thermal solutions for both domestic and industrial applications.” Source: RevenueBase Database · checked Sep 30, 2026
20	Merriott UK	Partial evidence	Gateshead, United KingdomHQ checked Sep 30, 2026	201-500	24 contacts →
	Partial evidence “Merriott is the better choice for bespoke heating solutions for commercial applications across the UK and Ireland.” Source: RevenueBase Database · checked Sep 30, 2026
21	Elnur UK	Strong evidence	Leigh, United KingdomHQ checked Sep 30, 2026	11-50	19 contacts →
	Strong evidence “ELNUR was founded in 1973 and since then, we have established ourselves as one of the leading UK providers of the most efficient heating system in the world: electric heating.” Source: RevenueBase Database · checked Sep 30, 2026
22	Hyco Manufacturing LTD	Strong evidence	Castleford, United KingdomHQ checked Sep 30, 2026	11-50	19 contacts →
	Strong evidence “Hyco Manufacturing Ltd has been established for over 20 years and is a West Yorkshire based manufacturer and distributor of electrical equipment specialising in serving the…” Source: RevenueBase Database · checked Sep 30, 2026
23	Thermosphere	Partial evidence	Marden, United KingdomHQ checked Sep 30, 2026	11-50	18 contacts →
	Partial evidence “The race to reduce our carbon emissions is on and that means we need to change how we heat homes.” Source: RevenueBase Database · checked Sep 30, 2026
24	Irsap UK Limited	Strong evidence	East Grinstead, United KingdomHQ checked Sep 30, 2026	1,001-5,000	17 contacts →
	Strong evidence “IRSAP Group (Italy’s leading manufacturer of designer radiators) acquired UK Heating Group, the UK’s leading independent distributor of designer radiators to the Plumbing &…” Source: RevenueBase Database · checked Sep 30, 2026
25	Tansun Limited	Partial evidence	West Bromwich, United KingdomHQ checked Sep 30, 2026	51-200	15 contacts →
	Partial evidence “Tansun has been at the forefront of infrared heating for over 40 years, with a rich heritage of British excellence.” 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: electric heater 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 electric heater manufacturers.
Partial evidence: Its own public description names part of electric heater manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electric heater 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 185 electric heater manufacturers based in the United Kingdom

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Electric heater manufacturers based in the United Kingdom at a glance

As of Sep 30, 2026

28.3%Verified-email coverage

14.6Average contacts per company

11-50Median size (employees)

7.0%Largest-city concentration · London

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 185 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 electric heater 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 “electric heater 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 electric heater 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 electric heater 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, 763 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.

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 electric heater 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 electric heater manufacturers are there based in the United Kingdom?

RevenueBase identified 185 electric heater 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?

Ideal Heating, headquartered in Hull, tops this list with the largest team on record.

Which city has the most electric heater manufacturers?

London leads with 13 headquartered companies, followed by Leeds (5) and Leicester (5).

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 763 verified decision-maker contacts tracked across these 185 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.