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 company matches for commercial heating system installers associated with 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 company matches for commercial heating system installers associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 19, 2026 How this list was built

2,177Companies

11,622Contacts tracked

3,200Verified emails

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

Ranked by team size

Top 25 of 2,177 company matches for commercial heating system installers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	BAXI	Exact match	Warwick, United KingdomHQ recorded Sep 19, 2026	1,001-5,000	850 contacts →
	Exact match “We're leading the energy transition to zero carbon, by offering complete residential and commercial heating and hot water solutions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	Space Engineering Services LTD	Exact match	Bristol, United KingdomHQ recorded Sep 19, 2026	201-500	312 contacts →
	Exact match “Space Engineering Services is the UK’s leading provider of refrigeration, heating, ventilation and air conditioning services.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	Vaillant UK	Exact match	Belper, United KingdomHQ recorded Sep 19, 2026	501-1,000	179 contacts →
	Exact match “What does it take to deliver confidence at every stage of the heating journey?” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Swale Heating Part Of Sureserve	Exact match	Sittingbourne, United KingdomHQ recorded Sep 19, 2026	201-500	136 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Adcock Refrigeration And AIR Conditioning	Exact match	Cambridge, United KingdomHQ recorded Sep 19, 2026	201-500	132 contacts →
	Exact match “Adcock Refrigeration and Air Conditioning design, install, service and care for systems in commercial, industrial and individual residential premises right across the UK.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	Sureserve Compliance Central	Exact match	Unit 5-6 Boudicca Road, United KingdomHQ recorded Sep 19, 2026	501-1,000	127 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Robert Heath Heating	Exact match	New Malden, United KingdomHQ recorded Sep 19, 2026	201-500	122 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	BOXT	Exact match	Leeds, United KingdomHQ recorded Sep 19, 2026	51-200	116 contacts →
	Exact match “We started out as a trailblazing boiler installation company in 2017 – the first to offer everything effortlessly online.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Grant Engineering UK LTD	Exact match	Swindon, United KingdomHQ recorded Sep 19, 2026	51-200	115 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Airco Refrigeration And AIR Conditioning LTD	Exact match	Hull, United KingdomHQ recorded Sep 19, 2026	51-200	114 contacts →
	Exact match “Neil Fisher started Airco in 1991.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Byworth Boilers Limited	Exact match	Keighley, United KingdomHQ recorded Sep 19, 2026	51-200	96 contacts →
	Exact match “Your industrial boiler is at the heart of your operations.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	BSW Heating Limited	Exact match	Kenley, United KingdomHQ recorded Sep 19, 2026	201-500	96 contacts →
	Exact match “We are a domestic and commercial heating servicing, maintenance and installations contractor working across the South East.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	0800 Repair	Exact match	Houghton-le-spring, United KingdomHQ recorded Sep 19, 2026	201-500	80 contacts →
	Exact match “We specialise in a whole range of professional, gas, heating and boiler services, as well as home insulation and PV throughout UK.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	Aircon Group	Exact match	Stockton-on-tees, United KingdomHQ recorded Sep 19, 2026	51-200	77 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	Powrmatic Limited	Exact match	Ilminster, United KingdomHQ recorded Sep 19, 2026	51-200	73 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Nu-Heat Underfloor Heating & Renewables	Exact match	Honiton, United KingdomHQ recorded Sep 19, 2026	51-200	70 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	ECO Approach	Exact match	Beckenham, United KingdomHQ recorded Sep 19, 2026	51-200	67 contacts →
	Exact match “We’re a leading nationwide property services company established in 2013.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Aston Group	Exact match	Romford, United KingdomHQ recorded Sep 19, 2026	51-200	58 contacts →
	Exact match “Aston Group is a leading Building Services and Facilities Maintenance Company for Commercial and Residential clients.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	James Ramsay	Exact match	Glasgow, United KingdomHQ recorded Sep 19, 2026	51-200	54 contacts →
	Exact match “Heating - Pipework - Process - Maintenance.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Heatforce	Exact match	Cardiff, United KingdomHQ recorded Sep 19, 2026	51-200	53 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	BTU Installation & Maintenance LTD	Exact match	Guildford, United KingdomHQ recorded Sep 19, 2026	51-200	53 contacts →
	Exact match “BTU (Installation and Maintenance) Ltd, is a privately owned business based in Guildford, Surrey.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	WMS Underfloor Heating	Exact match	Brookmans Park, United KingdomHQ recorded Sep 19, 2026	11-50	51 contacts →
	Exact match “Leading supplier and installer of underfloor heating for residential developments in the UK.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	SBS Electrical Limited	Exact match	West Sussex, United KingdomHQ recorded Sep 19, 2026	n/a	50 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Essex Thermal Services LTD	Exact match	Dartford, United KingdomHQ recorded Sep 19, 2026	51-200	47 contacts →
	Exact match “Essex Thermal Services Ltd are a UK based company specialising in Thermal Insulation, Trace Heating, Ventilation and Air Conditioning Installs.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Phoenix GAS Services LTD	Exact match	Stoke-On-Trent, United KingdomHQ recorded Sep 19, 2026	51-200	47 contacts →
	Exact match “Phoenix Gas Services is an established company, providing a wide range of gas installation and maintenance services to both the private and public sectors.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “commercial heating system installers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 2,177 commercial heating system installers based in the United Kingdom

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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

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “commercial heating system installers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 3,200 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Commercial heating system installers by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “commercial heating system installers”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 2,177 company matches for commercial heating system installers associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

BAXI tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most commercial heating system installers?

London leads with 123 company records, 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 limited free results with 500 credits to start. Upgrading provides access to the 3,200 professional contacts with verified work emails tracked across these 2,177 companies; direct dials are available where recorded.

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.

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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 SmartSearch, 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.