Company lists · Data refreshed September 2026

Top 25 Commercial heating system installers based in the United Kingdom

Name: Commercial heating system installers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 2,177 companies tracked

RevenueBase identified 2,177 commercial heating system installers headquartered in the United Kingdom as of September 2026 and tracks 11,622 professional contacts across them, including 3,200 with verified work emails. London is the largest hub.

This list covers commercial heating system installers 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 19, 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 19, 2026 86% judged on-target in blind review

2,177Companies

11,622Contacts tracked

3,200Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest commercial heating system installers based in the United Kingdom

Ranked by team size

Top 25 of 2,177 commercial heating system installers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to commercial heating system installers: 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	Strong evidence	Warwick, United KingdomHQ checked Sep 19, 2026	1,001-5,000	850 contacts →
	Strong 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 19, 2026
2	Space Engineering Services LTD	Partial evidence	Bristol, United KingdomHQ checked Sep 19, 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 19, 2026
3	Vaillant UK	Partial evidence	Belper, United KingdomHQ checked Sep 19, 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 19, 2026
4	Swale Heating Part Of Sureserve	Strong evidence	Sittingbourne, United KingdomHQ checked Sep 19, 2026	201-500	136 contacts →
	Strong 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 19, 2026
5	Adcock Refrigeration And AIR Conditioning	Strong evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	201-500	132 contacts →
	Strong evidence “Adcock Refrigeration and Air Conditioning design, install, service and care for systems in commercial, industrial and individual residential premises right across the UK.” Source: RevenueBase Database · checked Sep 19, 2026
6	Sureserve Compliance Central	Strong evidence	Unit 5-6 Boudicca Road, United KingdomHQ checked Sep 19, 2026	501-1,000	127 contacts →
	Strong 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 19, 2026
7	Robert Heath Heating	Partial evidence	New Malden, United KingdomHQ checked Sep 19, 2026	201-500	122 contacts →
	Partial evidence “Robert Heath Heating is a leading provider of heating, hot water and electrical solutions for the social housing sector and private clients in the UK.” Source: RevenueBase Database · checked Sep 19, 2026
8	BOXT	Indirect evidence	Leeds, United KingdomHQ checked Sep 19, 2026	51-200	116 contacts →
	Indirect evidence “We started out as a trailblazing boiler installation company in 2017 – the first to offer everything effortlessly online.” Source: RevenueBase Database · checked Sep 19, 2026
9	Grant Engineering UK LTD	Strong evidence	Swindon, United KingdomHQ checked Sep 19, 2026	51-200	115 contacts →
	Strong evidence “We are a leading supplier of sustainable heating systems, including HVO boilers, air source heat pumps, solar thermal, hot water storage cylinders, aluminium radiators and…” Source: RevenueBase Database · checked Sep 19, 2026
10	Airco Refrigeration And AIR Conditioning LTD	Indirect evidence	Hull, United KingdomHQ checked Sep 19, 2026	51-200	114 contacts →
	Indirect evidence “Neil Fisher started Airco in 1991.” Source: RevenueBase Database · checked Sep 19, 2026
11	Byworth Boilers Limited	Indirect evidence	Keighley, United KingdomHQ checked Sep 19, 2026	51-200	96 contacts →
	Indirect evidence “Your industrial boiler is at the heart of your operations.” Source: RevenueBase Database · checked Sep 19, 2026
12	BSW Heating Limited	Strong evidence	Kenley, United KingdomHQ checked Sep 19, 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 19, 2026
13	0800 Repair	Partial evidence	Houghton-le-spring, United KingdomHQ checked Sep 19, 2026	201-500	80 contacts →
	Partial evidence “We specialise in a whole range of professional, gas, heating and boiler services, as well as home insulation and PV throughout UK.” Source: RevenueBase Database · checked Sep 19, 2026
14	Aircon Group	Partial evidence	Stockton-on-tees, United KingdomHQ checked Sep 19, 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 19, 2026
15	Powrmatic Limited	Strong evidence	Ilminster, United KingdomHQ checked Sep 19, 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 19, 2026
16	Nu-Heat Underfloor Heating & Renewables	Strong evidence	Honiton, United KingdomHQ checked Sep 19, 2026	51-200	70 contacts →
	Strong 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 19, 2026
17	ECO Approach	Indirect evidence	Beckenham, United KingdomHQ checked Sep 19, 2026	51-200	67 contacts →
	Indirect evidence “We’re a leading nationwide property services company established in 2013.” Source: RevenueBase Database · checked Sep 19, 2026
18	Aston Group	Partial evidence	Romford, United KingdomHQ checked Sep 19, 2026	51-200	58 contacts →
	Partial evidence “Aston Group is a leading Building Services and Facilities Maintenance Company for Commercial and Residential clients.” Source: RevenueBase Database · checked Sep 19, 2026
19	James Ramsay	Partial evidence	Glasgow, United KingdomHQ checked Sep 19, 2026	51-200	54 contacts →
	Partial evidence “Heating - Pipework - Process - Maintenance.” Source: RevenueBase Database · checked Sep 19, 2026
20	Heatforce	Indirect evidence	Cardiff, United KingdomHQ checked Sep 19, 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 19, 2026
21	BTU Installation & Maintenance LTD	Indirect evidence	Guildford, United KingdomHQ checked Sep 19, 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 19, 2026
22	WMS Underfloor Heating	Strong evidence	Brookmans Park, United KingdomHQ checked Sep 19, 2026	11-50	51 contacts →
	Strong evidence “Leading supplier and installer of underfloor heating for residential developments in the UK.” Source: RevenueBase Database · checked Sep 19, 2026
23	SBS Electrical Limited	Indirect evidence	West Sussex, United KingdomHQ checked Sep 19, 2026	n/a	50 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
24	Essex Thermal Services LTD	Partial evidence	Dartford, United KingdomHQ checked Sep 19, 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 19, 2026
25	Phoenix GAS Services LTD	Indirect evidence	Stoke-On-Trent, United KingdomHQ checked Sep 19, 2026	51-200	47 contacts →
	Indirect evidence “Phoenix Gas Services is an established company, providing a wide range of gas installation and maintenance services to both the private and public sectors.” Source: RevenueBase Database · checked Sep 19, 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: commercial heating system installers. 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 commercial heating system installers.
Partial evidence: Its own public description names part of commercial heating system installers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name commercial heating system installers. 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 2,177 commercial heating system installers based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 3,200 reachable decision-makers.

Free signup · no credit card

View the full list →

Commercial heating system installers based in the United Kingdom at a glance

As of Sep 19, 2026

27.5%Verified-email coverage

5.3Average contacts per company

1-10Median size (employees)

5.6%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,419

11-50

558

51-200

201-500

501-1,000

1,001-5,000

10001+

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 2,177 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 commercial heating system installers, 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 “commercial heating system installers”. 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 commercial heating system installers), 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 commercial heating system installers, 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, 3,200 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 19, 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.

Commercial heating system installers by metro

Commercial heating system installers in London123
Commercial heating system installers in Glasgow33
Commercial heating system installers in Leeds31
Commercial heating system installers in Birmingham27

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 commercial heating system installers, 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 commercial heating system installers are there based in the United Kingdom?

RevenueBase identified 2,177 commercial heating system installers 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 commercial heating system installers?

London leads with 123 headquartered companies, followed by Glasgow (33) and Leeds (31).

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 3,200 verified decision-maker contacts tracked across these 2,177 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 19, 2026.

Ready to reach these companies? Verified emails and direct dials for all 2,177 commercial heating system installers based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Commercial heating system installers by geography

Browse the directory

Browse: Companies home · All United Kingdom lists · All Commercial heating system installers lists · New lists

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.