Company lists · Data refreshed September 2026

Top 25 Hvac system optimization firms based in the United Kingdom

Name: Hvac system optimization firms 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 500 companies tracked

RevenueBase identified 500 hvac system optimization firms headquartered in the United Kingdom as of September 2026 and tracks 4,543 professional contacts across them, including 1,574 with verified work emails. London is the largest hub.

This list covers hvac system optimization firms 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

500Companies

4,543Contacts tracked

1,574Verified emails

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The 25 largest hvac system optimization firms based in the United Kingdom

Ranked by team size

Top 25 of 500 hvac system optimization firms 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 hvac system optimization firms: 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	Colt International	Indirect evidence	Petersfield, United KingdomHQ checked Sep 20, 2026	1,001-5,000	505 contacts →
	Indirect evidence “Since 1931 we have been harnessing the natural elements to provide healthy, comfortable and safe working and living conditions in buildings.” 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	Star Refrigeration	Indirect evidence	Glasgow, United KingdomHQ checked Sep 20, 2026	201-500	298 contacts →
	Indirect evidence “Star Refrigeration is a globally diversified cooling, heating, freezing, mechanical and electrical group of companies.” Source: RevenueBase Database · checked Sep 20, 2026
4	Swegon Uk&i	Partial evidence	Ashby-de-la-zouch, United KingdomHQ checked Sep 20, 2026	501-1,000	156 contacts →
	Partial evidence “Swegon is a market leading supplier of energy efficient indoor climate, cooling and life safety systems.” Source: RevenueBase Database · checked Sep 20, 2026
5	Fairheat	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	115 contacts →
	Indirect evidence “If you are operating a heat network, or planning a new heat network, then FairHeat can ensure that you get maximum efficiency from your heat networks while reducing operating and…” Source: RevenueBase Database · checked Sep 20, 2026
6	Daikin Applied UK LTD	Partial evidence	Cramlington, United KingdomHQ checked Sep 20, 2026	51-200	97 contacts →
	Partial evidence “Daikin Applied (UK) Ltd (formerly McQuay UK Ltd) is the market leader in energy-efficient end-to-end HVAC solutions, including AHU and chiller products, heat pumps, service and…” Source: RevenueBase Database · checked Sep 20, 2026
7	Nationwide AIR Conditioning Limited	Indirect evidence	Edenbridge, United KingdomHQ checked Sep 20, 2026	51-200	92 contacts →
	Indirect evidence “Nationwide Air Conditioning Limited is a carbon-neutral business that has been exceeding customer expectations since 2001.” Source: RevenueBase Database · checked Sep 20, 2026
8	Powrmatic Limited	Strong evidence	Ilminster, United KingdomHQ checked Sep 20, 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 20, 2026
9	BTU Installation & Maintenance LTD	Indirect evidence	Guildford, United KingdomHQ checked Sep 20, 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 20, 2026
10	Mitsubishi Heavy Industries Air-Conditioning Europe	Partial evidence	Uxbridge, United KingdomHQ checked Sep 20, 2026	51-200	50 contacts →
	Partial evidence “Welcome to Mitsubishi Heavy Industries Air Conditioning Europe Ltd (MHIAE), a company created by MHI for all HVAC solutions across Europe.” Source: RevenueBase Database · checked Sep 20, 2026
11	AET Flexible Space	Indirect evidence	East Grinstead, United KingdomHQ checked Sep 20, 2026	11-50	43 contacts →
	Indirect evidence “AET Flexible Space has been redefining how buildings breathe since 1993.” Source: RevenueBase Database · checked Sep 20, 2026
12	B-Engineering Group Certified B Corp	Indirect evidence	Warrington, United KingdomHQ checked Sep 20, 2026	51-200	39 contacts →
	Indirect evidence “We are a purpose driven engineering business, passionate about our people and the environment.” Source: RevenueBase Database · checked Sep 20, 2026
13	Principal Hvac	Strong evidence	Belfast, United KingdomHQ checked Sep 20, 2026	51-200	34 contacts →
	Strong evidence “Principal HVAC are at the leading edge of Heating, Ventilation & Air conditioning systems for commercial and residential property.” Source: RevenueBase Database · checked Sep 20, 2026
14	Quora Group	Strong evidence	North Shields, United KingdomHQ checked Sep 20, 2026	51-200	33 contacts →
	Strong evidence “Professional service supplying, installing and maintaining energy efficient HVAC systems.” Source: RevenueBase Database · checked Sep 20, 2026
15	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
16	361 Degrees LTD AIR Conditioning, Heating & Ventilation Solutions	Indirect evidence	Leighton Buzzard, United KingdomHQ checked Sep 20, 2026	11-50	30 contacts →
	Indirect evidence “A good environment can improve morale, productivity and employee retention.” 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	Oceanair UK LTD	Indirect evidence	Mansfield, United KingdomHQ checked Sep 20, 2026	11-50	28 contacts →
	Indirect evidence “Oceanair is an award-winning distributor of air conditioning and heating products.” Source: RevenueBase Database · checked Sep 20, 2026
19	Robell Control Systems Limited	Partial evidence	Birmingham, United KingdomHQ checked Sep 20, 2026	11-50	27 contacts →
	Partial evidence “Robell Control Systems Limited established in 1989, we are privately owned independent company and are leading independent specialists for design, installation, commissioning and…” Source: RevenueBase Database · checked Sep 20, 2026
20	JSA Service	Indirect evidence	Sunbury, United KingdomHQ checked Sep 20, 2026	11-50	26 contacts →
	Indirect evidence “JSA Service specialise in providing first class commercial Heating, Ventilation, Air Conditioning and Refrigeration services for nearly 50 years.” Source: RevenueBase Database · checked Sep 20, 2026
21	Bonus Eventus Maintenance LTD	Strong evidence	Camberley, United KingdomHQ checked Sep 20, 2026	11-50	26 contacts →
	Strong evidence “Trusted provider of cost-saving maintenance and repair of commercial heating, ventilation & air conditioning (HVAC) systems in London, Surrey, Hampshire, Hertfordshire, Berkshire…” Source: RevenueBase Database · checked Sep 20, 2026
22	Industrial Refrigeration Services LTD	Indirect evidence	Bromsgrove, United KingdomHQ checked Sep 20, 2026	11-50	24 contacts →
	Indirect evidence “Specialists in air conditioning, refrigeration, ventilation, energy management and turnkey projects.” Source: RevenueBase Database · checked Sep 20, 2026
23	Aircon Services	Indirect evidence	Princes Risborough, United KingdomHQ checked Sep 20, 2026	11-50	24 contacts →
	Indirect evidence “At Aircon Services, we’ve been helping companies reduce their energy costs whilst ensuring their businesses are kept cool for over 30 years.” Source: RevenueBase Database · checked Sep 20, 2026
24	RJ Urmson Group	Indirect evidence	Chorley, United KingdomHQ checked Sep 20, 2026	51-200	23 contacts →
	Indirect evidence “RJ Urmson Group consists of 5 companies: RJ Urmson Commissioning Engineers Ltd, Urmson LLP, National Hygiene Services Ltd, Urmson Fire Specialists Ltd and B&R Consulting Engineers…” Source: RevenueBase Database · checked Sep 20, 2026
25	HVAC	Strong evidence	Moreton-on-lugg, United KingdomHQ checked Sep 20, 2026	201-500	23 contacts →
	Strong evidence “FläktGroup UK specialise in #hvac systems and #hvacservice we offer a range of products which include #AirHandling Units #CRAC #DataCenter cooling #firesafety #fans #airpurifier…” 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 system optimization firms. 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 system optimization firms.
Partial evidence: Its own public description names part of hvac system optimization firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hvac system optimization firms. 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 500 hvac system optimization firms based in the United Kingdom

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Hvac system optimization firms based in the United Kingdom at a glance

As of Sep 20, 2026

34.6%Verified-email coverage

9.1Average contacts per company

1-10Median size (employees)

11.4%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

266

11-50

185

51-200

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 500 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 system optimization firms, 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 “hvac system optimization firms”. 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 system optimization firms), 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 system optimization firms, 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, 1,574 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 system optimization firms by metro

Hvac system optimization firms in London57

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 system optimization firms, 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 system optimization firms are there based in the United Kingdom?

RevenueBase identified 500 hvac system optimization firms 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?

Colt International, headquartered in Petersfield, tops this list with the largest team on record.

Which city has the most hvac system optimization firms?

London leads with 57 headquartered companies, followed by Birmingham (10) and Bristol (9).

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 1,574 verified decision-maker contacts tracked across these 500 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.