Company lists · Data refreshed September 2026

Top 25 Air heater manufacturers based in the United Kingdom

Name: Air 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 139 companies tracked

RevenueBase identified 139 air heater manufacturers headquartered in the United Kingdom as of September 2026 and tracks 1,745 professional contacts across them, including 661 with verified work emails. London is the largest hub.

This list covers air 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

139Companies

1,745Contacts tracked

661Verified emails

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The 25 largest air heater manufacturers based in the United Kingdom

Ranked by team size

Top 25 of 139 air 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 air 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	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
2	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
3	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
4	Boustead International Heaters	Partial evidence	Burgess Hill, United KingdomHQ checked Sep 30, 2026	51-200	79 contacts →
	Partial evidence “Boustead International Heaters is a leading global specialist in designing, engineering and supplying direct-fired process heater systems, waste heat recovery units and once…” Source: RevenueBase Database · checked Sep 30, 2026
5	Wozair Limited	Strong evidence	Gillingham, United KingdomHQ checked Sep 30, 2026	51-200	79 contacts →
	Strong evidence “Wozair specialises in the design and manufacture of high integrity heating, ventilating and air conditioning (HVAC) equipment for offshore oil and gas, nuclear, marine…” Source: RevenueBase Database · checked Sep 30, 2026
6	Powrmatic Limited	Strong evidence	Ilminster, United KingdomHQ checked Sep 30, 2026	51-200	73 contacts →
	Strong evidence “Powrmatic is a leading manufacturer and solution provider of advanced HVAC systems, including warm air heating, radiant heating, electric and water-based systems, as well as…” Source: RevenueBase Database · checked Sep 30, 2026
7	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
8	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
9	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
10	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
11	AIR Vent Technology	Partial evidence	Andover, United KingdomHQ checked Sep 30, 2026	11-50	32 contacts →
	Partial evidence “Since 1996, our high-quality products, commitment to UK manufacturing and outstanding customer service have put us at the forefront of the heating and ventilation industry.” Source: RevenueBase Database · checked Sep 30, 2026
12	GRE Ltd. Thermal Engineering And Cryogenics	Indirect evidence	Willand, United KingdomHQ checked Sep 30, 2026	11-50	31 contacts →
	Indirect evidence “GRE is a privately owned business based in the UK.” Source: RevenueBase Database · checked Sep 30, 2026
13	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
14	Johnson & Starley LTD	Partial evidence	Northampton, United KingdomHQ checked Sep 30, 2026	51-200	26 contacts →
	Partial evidence “As a market leader in providing energy efficient heating and ventilation solutions, Johnson & Starley has an impressive portfolio of products.” Source: RevenueBase Database · checked Sep 30, 2026
15	Turnbull & Scott Engineers LTD	Partial evidence	Hawick, United KingdomHQ checked Sep 30, 2026	11-50	25 contacts →
	Partial evidence “Turnbull & Scott are mechanical and electrical engineers specialising in the generation, transfer and recovery of heat.” Source: RevenueBase Database · checked Sep 30, 2026
16	Diffusion Group	Partial evidence	West Molesey, United KingdomHQ checked Sep 30, 2026	51-200	22 contacts →
	Partial evidence “Diffusion is a British manufacturer with an enviable reputation built over 60 years in designing standard and bespoke fan coil units that serve the needs of countless businesses…” Source: RevenueBase Database · checked Sep 30, 2026
17	Essco Group	Strong evidence	Southampton, United KingdomHQ checked Sep 30, 2026	11-50	20 contacts →
	Strong evidence “Essco design and supply energy efficient products and systems to the heating, ventilating, air conditioning and process industries.” Source: RevenueBase Database · checked Sep 30, 2026
18	Elnur UK	Partial evidence	Leigh, United KingdomHQ checked Sep 30, 2026	11-50	19 contacts →
	Partial 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
19	Comtherm LTD	Partial evidence	Droitwich, United KingdomHQ checked Sep 30, 2026	11-50	19 contacts →
	Partial evidence “Established in 1974, Comtherm Ltd has over forty years of experience in the design, manufacture, installation and commissioning of industrial combustion equipment for the…” Source: RevenueBase Database · checked Sep 30, 2026
20	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
21	Schwank UK	Indirect evidence	Doncaster, United KingdomHQ checked Sep 30, 2026	11-50	17 contacts →
	Indirect evidence “The Schwank Group.” Source: RevenueBase Database · checked Sep 30, 2026
22	Frenger Systems LTD	Partial evidence	Derby, United KingdomHQ checked Sep 30, 2026	51-200	16 contacts →
	Partial evidence “Frenger Systems is a world-renowned specialist manufacturer of space conditioning products for indoor environments.” Source: RevenueBase Database · checked Sep 30, 2026
23	H C Coils LTD	Strong evidence	Fareham, United KingdomHQ checked Sep 30, 2026	51-200	15 contacts →
	Strong evidence “HC Coils is a leading UK manufacturer of bespoke heat exchange solutions, supplying customers across the HVAC, refrigeration, and process cooling industries.” Source: RevenueBase Database · checked Sep 30, 2026
24	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
25	Ecostrad	Partial evidence	Leeds, United KingdomHQ checked Sep 30, 2026	11-50	14 contacts →
	Partial evidence “At Ecostrad, we champion energy efficient electric heating solutions.” 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: air 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 air heater manufacturers.
Partial evidence: Its own public description names part of air heater manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name air 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 139 air heater manufacturers based in the United Kingdom

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Air heater manufacturers based in the United Kingdom at a glance

As of Sep 30, 2026

37.9%Verified-email coverage

12.6Average contacts per company

11-50Median size (employees)

5.8%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

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 139 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 air 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 “air 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 air 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 air 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, 661 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 air 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 air heater manufacturers are there based in the United Kingdom?

RevenueBase identified 139 air 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?

Dimplex UK, headquartered in Portadown, tops this list with the largest team on record.

Which city has the most air heater manufacturers?

London leads with 8 headquartered companies, followed by Wednesbury (5) and Leicester (3).

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 661 verified decision-maker contacts tracked across these 139 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.