Company lists · Data refreshed September 2026

Top 25 Heat recovery system installation companies based in the United Kingdom

Name: Heat recovery system installation companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 595 companies tracked

RevenueBase identified 595 heat recovery system installation companies headquartered in the United Kingdom as of September 2026 and tracks 4,883 professional contacts across them, including 1,446 with verified work emails. London is the largest hub.

This list covers heat recovery system installation companies 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 20, 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 20, 2026 86% judged on-target in blind review

595Companies

4,883Contacts tracked

1,446Verified emails

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The 25 largest heat recovery system installation companies based in the United Kingdom

Ranked by team size

Top 25 of 595 heat recovery system installation companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to heat recovery system installation companies: 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	Indirect evidence	Warwick, United KingdomHQ checked Sep 20, 2026	1,001-5,000	850 contacts →
	Indirect 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 20, 2026
2	Space Engineering Services LTD	Indirect evidence	Bristol, United KingdomHQ checked Sep 20, 2026	201-500	312 contacts →
	Indirect evidence “Space Engineering Services is the UK’s leading provider of refrigeration, heating, ventilation and air conditioning services.” Source: RevenueBase Database · checked Sep 20, 2026
3	Serck Global	Strong evidence	Oxford, United KingdomHQ checked Sep 20, 2026	501-1,000	232 contacts →
	Strong evidence “Serck provides specialist design, manufacture, installation, service, and global export of heat transfer technology across a range of sectors and geographies.” Source: RevenueBase Database · checked Sep 20, 2026
4	Vaillant UK	Indirect evidence	Belper, United KingdomHQ checked Sep 20, 2026	501-1,000	179 contacts →
	Indirect evidence “What does it take to deliver confidence at every stage of the heating journey?” Source: RevenueBase Database · checked Sep 20, 2026
5	Swale Heating Part Of Sureserve	Partial evidence	Sittingbourne, United KingdomHQ checked Sep 20, 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 20, 2026
6	Grant Engineering UK LTD	Strong evidence	Swindon, United KingdomHQ checked Sep 20, 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 20, 2026
7	Airco Refrigeration And AIR Conditioning LTD	Indirect evidence	Hull, United KingdomHQ checked Sep 20, 2026	51-200	114 contacts →
	Indirect evidence “Neil Fisher started Airco in 1991.” Source: RevenueBase Database · checked Sep 20, 2026
8	Spirax Sarco UK And Ireland	Indirect evidence	Cheltenham, United KingdomHQ checked Sep 20, 2026	1,001-5,000	92 contacts →
	Indirect evidence “Why are we here?” Source: RevenueBase Database · checked Sep 20, 2026
9	Nu-Heat Underfloor Heating & Renewables	Strong evidence	Honiton, United KingdomHQ checked Sep 20, 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 20, 2026
10	ECO Approach	Indirect evidence	Beckenham, United KingdomHQ checked Sep 20, 2026	51-200	67 contacts →
	Indirect evidence “We’re a leading nationwide property services company established in 2013.” Source: RevenueBase Database · checked Sep 20, 2026
11	Hamworthy Heating LTD	Indirect evidence	Hull, United KingdomHQ checked Sep 20, 2026	51-200	45 contacts →
	Indirect evidence “Hamworthy Heating is a British manufacturer and supplier of commercial heating and hot water products.” Source: RevenueBase Database · checked Sep 20, 2026
12	Vokera By Riello	Indirect evidence	Hertfordshire, United KingdomHQ checked Sep 20, 2026	11-50	45 contacts →
	Indirect 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 20, 2026
13	Lochinvar, UK	Indirect evidence	Banbury, United KingdomHQ checked Sep 20, 2026	11-50	40 contacts →
	Indirect 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 20, 2026
14	Heatable	Indirect evidence	Warrington, United KingdomHQ checked Sep 20, 2026	11-50	37 contacts →
	Indirect evidence “The UK's trusted boiler, aircon and renewable installers.” Source: RevenueBase Database · checked Sep 20, 2026
15	Pitkin & Ruddock LTD	Strong evidence	Ipswich, United KingdomHQ checked Sep 20, 2026	11-50	32 contacts →
	Strong evidence “Refrigeration, heat recovery, ventilation, heat pumps and air-conditioning: At Pitkin & Ruddock our success for delivering complete temperature controlled solutions, service and…” Source: RevenueBase Database · checked Sep 20, 2026
16	Artus AIR	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	31 contacts →
	Indirect evidence “Artus Air is an Air Tech company dedicated to improving the way buildings are cooled and heated, globally by reducing carbon impact and improving the comfort of occupants.” Source: RevenueBase Database · checked Sep 20, 2026
17	Oakland AIR Control	Partial evidence	Worcester, United KingdomHQ checked Sep 20, 2026	11-50	30 contacts →
	Partial evidence “We are a specialist heating, ventilation, air conditioning (HVAC), heat pump, electrical and BEMS controls engineering solutions business and post ESOS service provider.” Source: RevenueBase Database · checked Sep 20, 2026
18	Johnson & Starley LTD	Indirect evidence	Northampton, United KingdomHQ checked Sep 20, 2026	51-200	26 contacts →
	Indirect 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 20, 2026
19	M&n Heating & Plumbing	Indirect evidence	Banbury, United KingdomHQ checked Sep 20, 2026	51-200	26 contacts →
	Indirect evidence “M&N Heating & Plumbing is an independent company based in Bloxham on the edge of Banbury, serving Oxfordshire, Northamptonshire, Buckinghamshire and Warwickshire.” Source: RevenueBase Database · checked Sep 20, 2026
20	HCS Mechanical Services	Indirect evidence	Skipton, United KingdomHQ checked Sep 20, 2026	51-200	26 contacts →
	Indirect evidence “H Clarke & Sons Ltd was first established in 1920 and has grown to become one of the most renowned independent heating and plumbing companies in the region.” Source: RevenueBase Database · checked Sep 20, 2026
21	Turnbull & Scott Engineers LTD	Strong evidence	Hawick, United KingdomHQ checked Sep 20, 2026	11-50	25 contacts →
	Strong evidence “Turnbull & Scott are mechanical and electrical engineers specialising in the generation, transfer and recovery of heat.” Source: RevenueBase Database · checked Sep 20, 2026
22	Veolia Cogenco Combined Heat & Power	Partial evidence	Horsham, United KingdomHQ checked Sep 20, 2026	51-200	24 contacts →
	Partial evidence “Because it is an efficient process, using far more of the available energy in a fuel than either traditional power or heat generation methods, CHP is inherently better for the…” Source: RevenueBase Database · checked Sep 20, 2026
23	Thermal Earth Limited	Strong evidence	Ammanford, United KingdomHQ checked Sep 20, 2026	11-50	22 contacts →
	Strong evidence “Thermal Earth is a leading UK distributor of renewable heating technologies incorporating wood biomass boilers, heat pumps and solar thermal systems based in South Wales.” Source: RevenueBase Database · checked Sep 20, 2026
24	MCL Energy LTD	Indirect evidence	Doncaster, United KingdomHQ checked Sep 20, 2026	11-50	21 contacts →
	Indirect evidence “MCL Energy has been providing innovative site energy solutions for almost three decades to many different sectors but with one common goal – to provide competent, cost-effective…” Source: RevenueBase Database · checked Sep 20, 2026
25	Nerg LTD	Indirect evidence	Lincoln, United KingdomHQ checked Sep 20, 2026	11-50	21 contacts →
	Indirect evidence “We are a Midlands based business, that recommends and installs the right equipment to improves your business's profitability and carbon usage.” Source: RevenueBase Database · checked Sep 20, 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: heat recovery system installation companies. 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 heat recovery system installation companies.
Partial evidence: Its own public description names part of heat recovery system installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name heat recovery system installation companies. 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 595 heat recovery system installation companies based in the United Kingdom

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Heat recovery system installation companies based in the United Kingdom at a glance

As of Sep 20, 2026

29.6%Verified-email coverage

8.2Average contacts per company

1-10Median size (employees)

6.9%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

353

11-50

193

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 595 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 heat recovery system installation companies, 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 “heat recovery system installation companies”. 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 heat recovery system installation companies), 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 heat recovery system installation companies, 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, 1,446 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 20, 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.

Heat recovery system installation companies by metro

Heat recovery system installation companies in London41

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 heat recovery system installation companies, 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 heat recovery system installation companies are there based in the United Kingdom?

RevenueBase identified 595 heat recovery system installation companies 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 heat recovery system installation companies?

London leads with 41 headquartered companies, followed by Bristol (10) and Glasgow (8).

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 1,446 verified decision-maker contacts tracked across these 595 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 20, 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.