Company lists · Data refreshed September 2026

Top 25 Hvac efficiency companies based in London, United Kingdom

Name: Hvac efficiency companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 153 companies tracked

RevenueBase identified 153 hvac efficiency companies headquartered in London, United Kingdom as of September 2026 and tracks 847 professional contacts across them, including 273 with verified work emails. London is the largest hub.

This list covers hvac efficiency companies headquartered in London, 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

153Companies

847Contacts tracked

273Verified emails

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The 25 largest hvac efficiency companies based in London, United Kingdom

Ranked by team size

Top 25 of 153 hvac efficiency companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to hvac efficiency 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	Purdy Part Of Sureserve	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	85 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 20, 2026
2	Elmech LTD	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	42 contacts →
	Indirect evidence “The core activities of our business are all aspects of mechanical and electrical services including air conditioning, sprinkler systems, CHW<HW, ventilation, BMS, door entry and…” Source: RevenueBase Database · checked Sep 20, 2026
3	Hanover Building Services	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	34 contacts →
	Indirect evidence “Hanover is an award-winning building services provider that specialises in electrical, mechanical, plumbing, heating and renewable energy installations.” Source: RevenueBase Database · checked Sep 20, 2026
4	Phoenix ME	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	501-1,000	33 contacts →
	Indirect evidence “We stand as a well-established industry leader, specialising in the design, installation, and commissioning of mechanical and electrical systems across diverse sectors.” Source: RevenueBase Database · checked Sep 20, 2026
5	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
6	Condition Environment Services Limited	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	26 contacts →
	Indirect evidence “At Condition Environment Services Limited, we lead the way in mechanical building services.” Source: RevenueBase Database · checked Sep 20, 2026
7	ONE MEP	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	21 contacts →
	Indirect evidence “At ONE MEP, we deliver professional, reliable, and high-quality MEP solutions across London and surrounding areas.” Source: RevenueBase Database · checked Sep 20, 2026
8	Cleanheat	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	17 contacts →
	Indirect evidence “CleanHeat are a London based Commercial Heating and engineering company working throughout central London and the Home Counties.” Source: RevenueBase Database · checked Sep 20, 2026
9	BTP Consultants	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	12 contacts →
	Indirect evidence “We design mechanical and electrical systems, advise on all aspects of energy, carbon reduction and building physics.” Source: RevenueBase Database · checked Sep 20, 2026
10	Maskold Environmental LTD	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	10 contacts →
	Indirect evidence “Maskold is a family-run business, with over 65 years’ experience behind us, and we specialise in the design, installation and maintenance of refrigeration, air conditioning and…” Source: RevenueBase Database · checked Sep 20, 2026
11	London Direct Commercial AIR Conditioning & Facilities LTD	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Partial evidence “LDC is a specialist commercial air conditioning and chiller contractor providing maintenance, technical support and complex HVAC project solutions across London and the UK.” Source: RevenueBase Database · checked Sep 20, 2026
12	Leon Team Limited	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect evidence “Leon Team Limited has been proudly serving the Industry since 2012.” Source: RevenueBase Database · checked Sep 20, 2026
13	HIU Breakdownandrepairs LTD	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Indirect evidence “HIU Breakdownandrepairs Ltd is London's leading independently run Heat Interface Unit installation and maintenance service provider.” Source: RevenueBase Database · checked Sep 20, 2026
14	Celsius Solutions LTD	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	9 contacts →
	Partial evidence “Celsius Solutions Ltd delivers projects throughout London, the South East and the UK with our unequalled Design and Build service for the HVAC sector.” Source: RevenueBase Database · checked Sep 20, 2026
15	Applied Heating & Cooling LTD	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	6 contacts →
	Indirect evidence “Experts in the design, supply, installation and maintenance of Chillers, Heat Pumps and Air Conditioning” Source: RevenueBase Database · checked Sep 20, 2026
16	Polkadot Plumbers	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	6 contacts →
	Indirect evidence “NEW for 2023: We now offer ELECTRICALSand RENEWABLES as well as PLUMBING and HEATING!” Source: RevenueBase Database · checked Sep 20, 2026
17	Associated Cooling Services Limited	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	6 contacts →
	Indirect evidence “ACS were formed in 1991 to specialise in the installation and maintenance of Air Conditioning and Ventilation Systems.” Source: RevenueBase Database · checked Sep 20, 2026
18	TH Electrical & Mechanical LTD	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	6 contacts →
	Indirect evidence “TH ELECTRICAL & MECHANICAL LTD is a construction company based in London and operating throughout London and the South East, delivering the full range of mechanical, electrical &…” Source: RevenueBase Database · checked Sep 20, 2026
19	J&m Services Group	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	5 contacts →
	Indirect evidence “At J&M Mechanical Services, we specialise in providing expert mechanical solutions for commercial and industrial clients.” Source: RevenueBase Database · checked Sep 20, 2026
20	Racsel Building Services LTD	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	5 contacts →
	Indirect evidence “With over 50 years’ experience within the industry Racsel Building Services Limited specialize in Design, Installation, Maintenance and Servicing of heating, ventilation, cooling…” Source: RevenueBase Database · checked Sep 20, 2026
21	Skyline AIR Conditioning Services LTD	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	5 contacts →
	Indirect evidence “Design, Supply, Install, Commission, Service & Maintenance of Air Conditioning Equipment” Source: RevenueBase Database · checked Sep 20, 2026
22	Tenways	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	4 contacts →
	Partial evidence “Tenways Engineering provides Installation and control solutions for HVAC.” Source: RevenueBase Database · checked Sep 20, 2026
23	Hoveair Maintenance Services Limited	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	4 contacts →
	Indirect evidence “Hoveair are specialists in all disciplines of the Air Conditioning, Heating and Ventilation and Industry, giving comprehensive Design, Management, Installation, Commissioning and…” Source: RevenueBase Database · checked Sep 20, 2026
24	Franklynair Limited	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	11-50	4 contacts →
	Indirect evidence “Franklyn Air are specialists in the maintenance and installation of air conditioning across London homes and businesses as well as specialising in the installation and maintenance…” Source: RevenueBase Database · checked Sep 20, 2026
25	JP AIR Conditioning Services LTD	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	1-10	4 contacts →
	Indirect evidence “We are not just another London air conditioning company, we are the smart choice for customers who need an air conditioning company they can depend on.” 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: hvac efficiency 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 hvac efficiency companies.
Partial evidence: Its own public description names part of hvac efficiency companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hvac efficiency 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 153 hvac efficiency companies based in London, United Kingdom

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Hvac efficiency companies based in London, United Kingdom at a glance

As of Sep 20, 2026

32.2%Verified-email coverage

5.5Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 153 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 hvac efficiency 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 London, United Kingdom whose own description of what they do matches “hvac efficiency 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 hvac efficiency 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 hvac efficiency companies, and records with no verified work email. Companies headquartered outside London 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, 273 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.

Hvac efficiency companies by metro in the United Kingdom

Hvac efficiency companies in London153
Hvac efficiency companies in Bristol29
Hvac efficiency companies in Glasgow27
Hvac efficiency companies in Birmingham26

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 hvac efficiency 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 hvac efficiency companies are there based in London, United Kingdom?

RevenueBase identified 153 hvac efficiency companies headquartered in London, 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?

Purdy Part Of Sureserve, headquartered in London, tops this list with the largest team on record.

Which city has the most hvac efficiency companies?

London leads with 153 headquartered companies, followed by Bristol (29) and Glasgow (27).

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 273 verified decision-maker contacts tracked across these 153 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.