Company lists · Data refreshed September 2026

Top 25 Heating contractors based in the United Kingdom

Name: Heating contractors based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 2,982 companies tracked

RevenueBase identified 2,982 heating contractors headquartered in the United Kingdom as of September 2026 and tracks 13,863 professional contacts across them, including 3,521 with verified work emails. London is the largest hub.

This list covers heating contractors 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 16, 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 16, 2026 86% judged on-target in blind review

2,982Companies

13,863Contacts tracked

3,521Verified emails

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The 25 largest heating contractors based in the United Kingdom

Ranked by team size

Top 25 of 2,982 heating contractors based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to heating contractors: 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	BAXI	Partial evidence	Warwick, United KingdomHQ checked Sep 16, 2026	1,001-5,000	850 contacts →
	Partial evidence “We're leading the energy transition to zero carbon, by offering complete residential and commercial heating and hot water solutions.” Source: RevenueBase Database · checked Sep 16, 2026
2	Space Engineering Services LTD	Partial evidence	Bristol, United KingdomHQ checked Sep 16, 2026	201-500	312 contacts →
	Partial evidence “Space Engineering Services is the UK’s leading provider of refrigeration, heating, ventilation and air conditioning services.” Source: RevenueBase Database · checked Sep 16, 2026
3	Vaillant UK	Partial evidence	Belper, United KingdomHQ checked Sep 16, 2026	501-1,000	179 contacts →
	Partial evidence “What does it take to deliver confidence at every stage of the heating journey?” Source: RevenueBase Database · checked Sep 16, 2026
4	T Brown Group	Indirect evidence	Leatherhead, United KingdomHQ checked Sep 16, 2026	501-1,000	153 contacts →
	Indirect evidence “T Brown Group was formed on the 1st April 1971.” Source: RevenueBase Database · checked Sep 16, 2026
5	Exheat	Indirect evidence	Watton, United KingdomHQ checked Sep 16, 2026	51-200	142 contacts →
	Indirect evidence “At EXHEAT, we design and manufacture electric process heaters and control solutions.” Source: RevenueBase Database · checked Sep 16, 2026
6	Swale Heating Part Of Sureserve	Partial evidence	Sittingbourne, United KingdomHQ checked Sep 16, 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 16, 2026
7	Sureserve Compliance Central	Partial evidence	Unit 5-6 Boudicca Road, United KingdomHQ checked Sep 16, 2026	501-1,000	127 contacts →
	Partial evidence “With over 40 years of successful delivery experience in the domestic and commercial markets you can trust Sureserve Compliance Central with all your heating needs.” Source: RevenueBase Database · checked Sep 16, 2026
8	Airco Refrigeration And AIR Conditioning LTD	Indirect evidence	Hull, United KingdomHQ checked Sep 16, 2026	51-200	114 contacts →
	Indirect evidence “Neil Fisher started Airco in 1991.” Source: RevenueBase Database · checked Sep 16, 2026
9	BSW Heating Limited	Strong evidence	Kenley, United KingdomHQ checked Sep 16, 2026	201-500	96 contacts →
	Strong evidence “We are a domestic and commercial heating servicing, maintenance and installations contractor working across the South East.” Source: RevenueBase Database · checked Sep 16, 2026
10	JBC	Indirect evidence	Normanton, United KingdomHQ checked Sep 16, 2026	51-200	86 contacts →
	Indirect evidence “JBC Industrial Services is the leading name in Industrial Boiler and Burner service, maintenance, and repair.” Source: RevenueBase Database · checked Sep 16, 2026
11	Purdy Part Of Sureserve	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	201-500	85 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 16, 2026
12	Boustead International Heaters	Indirect evidence	Burgess Hill, United KingdomHQ checked Sep 16, 2026	51-200	79 contacts →
	Indirect 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 16, 2026
13	Wozair Limited	Partial evidence	Gillingham, United KingdomHQ checked Sep 16, 2026	51-200	79 contacts →
	Partial 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 16, 2026
14	Aircon Group	Partial evidence	Stockton-on-tees, United KingdomHQ checked Sep 16, 2026	51-200	77 contacts →
	Partial evidence “At Aircon Group, we’re dedicated to providing exceptional levels of customer service in Air Conditioning, Refrigeration, and Air-Source Heating Services, which we have done for…” Source: RevenueBase Database · checked Sep 16, 2026
15	Powrmatic Limited	Partial evidence	Ilminster, United KingdomHQ checked Sep 16, 2026	51-200	73 contacts →
	Partial 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 16, 2026
16	Nu-Heat Underfloor Heating & Renewables	Partial evidence	Honiton, United KingdomHQ checked Sep 16, 2026	51-200	70 contacts →
	Partial evidence “As the UK's largest supplier of warm water underfloor heating and integrated renewables, Nu‑Heat delivers fully designed, energy efficient systems to installers, housebuilders…” Source: RevenueBase Database · checked Sep 16, 2026
17	Ormandy Rycroft Engineering	Indirect evidence	Bradford, United KingdomHQ checked Sep 16, 2026	51-200	65 contacts →
	Indirect evidence “Ormandy Rycroft Engineering aims to be a market leading provider of world class heat transfer and packaged solutions through our integrated portfolio of products, and our…” Source: RevenueBase Database · checked Sep 16, 2026
18	Aston Group	Indirect evidence	Romford, United KingdomHQ checked Sep 16, 2026	51-200	58 contacts →
	Indirect evidence “Aston Group is a leading Building Services and Facilities Maintenance Company for Commercial and Residential clients.” Source: RevenueBase Database · checked Sep 16, 2026
19	AIR Technology Systems	Partial evidence	Bromsgrove, United KingdomHQ checked Sep 16, 2026	51-200	57 contacts →
	Partial evidence “Air Technology Systems Ltd (ATS) are design and project management specialist contractors focused on providing proprietary and energy saving, Climate Control & Ventilation…” Source: RevenueBase Database · checked Sep 16, 2026
20	James Ramsay	Partial evidence	Glasgow, United KingdomHQ checked Sep 16, 2026	51-200	54 contacts →
	Partial evidence “Heating - Pipework - Process - Maintenance.” Source: RevenueBase Database · checked Sep 16, 2026
21	Heatforce	Indirect evidence	Cardiff, United KingdomHQ checked Sep 16, 2026	51-200	53 contacts →
	Indirect evidence “Heatforce has evolved through word of mouth and customer recommendations, growing into a company that now employs 120 dedicated staff with 40 years of expertise.” Source: RevenueBase Database · checked Sep 16, 2026
22	BTU Installation & Maintenance LTD	Indirect evidence	Guildford, United KingdomHQ checked Sep 16, 2026	51-200	53 contacts →
	Indirect evidence “BTU (Installation and Maintenance) Ltd, is a privately owned business based in Guildford, Surrey.” Source: RevenueBase Database · checked Sep 16, 2026
23	WMS Underfloor Heating	Partial evidence	Brookmans Park, United KingdomHQ checked Sep 16, 2026	11-50	51 contacts →
	Partial evidence “Leading supplier and installer of underfloor heating for residential developments in the UK.” Source: RevenueBase Database · checked Sep 16, 2026
24	SBS Electrical Limited	Indirect evidence	West Sussex, United KingdomHQ checked Sep 16, 2026	n/a	50 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
25	Essex Thermal Services LTD	Partial evidence	Dartford, United KingdomHQ checked Sep 16, 2026	51-200	47 contacts →
	Partial evidence “Essex Thermal Services Ltd are a UK based company specialising in Thermal Insulation, Trace Heating, Ventilation and Air Conditioning Installs.” Source: RevenueBase Database · checked Sep 16, 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: heating contractors. 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 heating contractors.
Partial evidence: Its own public description names part of heating contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name heating contractors. 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 2,982 heating contractors based in the United Kingdom

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Heating contractors based in the United Kingdom at a glance

As of Sep 16, 2026

25.4%Verified-email coverage

4.6Average contacts per company

1-10Median size (employees)

6.4%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

1,984

11-50

727

51-200

137

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 2,982 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 heating contractors, 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 “heating contractors”. 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 heating contractors), 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 heating contractors, 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, 3,521 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.

Heating contractors by metro

Heating contractors in London192
Heating contractors in Glasgow43
Heating contractors in Leeds39
Heating contractors in Birmingham32
Heating contractors in Manchester31
Heating contractors in Bristol27
Heating contractors in Sheffield26
Heating contractors in Nottingham25

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 heating contractors, 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 heating contractors are there based in the United Kingdom?

RevenueBase identified 2,982 heating contractors 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?

BAXI, headquartered in Warwick, tops this list with the largest team on record.

Which city has the most heating contractors?

London leads with 192 headquartered companies, followed by Glasgow (43) and Leeds (39).

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 3,521 verified decision-maker contacts tracked across these 2,982 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.