Company lists · Data refreshed September 2026

Top 25 Hvac control systems integrators based in the United Kingdom

Name: Hvac control systems integrators based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 760 companies tracked

RevenueBase identified 760 hvac control systems integrators headquartered in the United Kingdom as of September 2026 and tracks 6,718 professional contacts across them, including 2,613 with verified work emails. London is the largest hub.

This list covers hvac control systems integrators 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 28, 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 28, 2026 86% judged on-target in blind review

760Companies

6,718Contacts tracked

2,613Verified emails

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The 25 largest hvac control systems integrators based in the United Kingdom

Ranked by team size

Top 25 of 760 hvac control systems integrators based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to hvac control systems integrators: 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 28, 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 28, 2026
2	Space Engineering Services LTD	Indirect evidence	Bristol, United KingdomHQ checked Sep 28, 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 28, 2026
3	Star Refrigeration	Indirect evidence	Glasgow, United KingdomHQ checked Sep 28, 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 28, 2026
4	Swegon Uk&i	Partial evidence	Ashby-de-la-zouch, United KingdomHQ checked Sep 28, 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 28, 2026
5	DPS Group	Indirect evidence	Glenrothes, United KingdomHQ checked Sep 28, 2026	51-200	139 contacts →
	Indirect evidence “Shaping the future, together.” Source: RevenueBase Database · checked Sep 28, 2026
6	Airco Refrigeration And AIR Conditioning LTD	Indirect evidence	Hull, United KingdomHQ checked Sep 28, 2026	51-200	114 contacts →
	Indirect evidence “Neil Fisher started Airco in 1991.” Source: RevenueBase Database · checked Sep 28, 2026
7	Trend Control Systems	Partial evidence	Horsham, United KingdomHQ checked Sep 28, 2026	501-1,000	113 contacts →
	Partial evidence “Trend is one of the world's leading Building Energy Management Systems manufacturers, with a worldwide distribution and support network covering over 50 countries.” Source: RevenueBase Database · checked Sep 28, 2026
8	Zehnder Group UK	Indirect evidence	Camberley, United KingdomHQ checked Sep 28, 2026	201-500	94 contacts →
	Indirect evidence “Zehnder Group is a leading international provider of indoor climate solutions, offering a comprehensive range of products and services for comfortable and healthy living…” Source: RevenueBase Database · checked Sep 28, 2026
9	Adsyst Automation Limited	Strong evidence	Yateley, United KingdomHQ checked Sep 28, 2026	51-200	93 contacts →
	Strong evidence “As a System Integrator for over 35 years, Adsyst (Automation) Ltd has been providing complex Control Systems for Process Control, Automation and Telemetry to customers worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
10	Resource Data Management	Strong evidence	Glasgow, United KingdomHQ checked Sep 28, 2026	51-200	88 contacts →
	Strong evidence “We help businesses optimise their HVACR and BMS control systems, reduce energy use, and ensure food safety compliance.” Source: RevenueBase Database · checked Sep 28, 2026
11	Wozair Limited	Partial evidence	Gillingham, United KingdomHQ checked Sep 28, 2026	51-200	79 contacts →
	Partial evidence “Wozair specialises in the design and manufacture of high integrity heating, ventilating and air conditioning (HVAC) equipment for offshore oil and gas, nuclear, marine…” Source: RevenueBase Database · checked Sep 28, 2026
12	Powrmatic Limited	Strong evidence	Ilminster, United KingdomHQ checked Sep 28, 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 28, 2026
13	Denca Controls LTD	Strong evidence	Widnes, United KingdomHQ checked Sep 28, 2026	51-200	66 contacts →
	Strong evidence “Renowned across numerous sectors as 'the systems integrator of choice', we have built a reputation on delivering high quality, value-for-money solutions that enhance production…” Source: RevenueBase Database · checked Sep 28, 2026
14	Elmleigh	Partial evidence	Hinckley, United KingdomHQ checked Sep 28, 2026	51-200	63 contacts →
	Partial evidence “Elmleigh are specialists in the integration of electrical and mechanical automation systems offering a complete Project Management service from conception through design…” Source: RevenueBase Database · checked Sep 28, 2026
15	BTU Installation & Maintenance LTD	Indirect evidence	Guildford, United KingdomHQ checked Sep 28, 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 28, 2026
16	Mitsubishi Heavy Industries Air-Conditioning Europe	Partial evidence	Uxbridge, United KingdomHQ checked Sep 28, 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 28, 2026
17	Simkiss Control Systems LTD	Strong evidence	Middleton, United KingdomHQ checked Sep 28, 2026	51-200	47 contacts →
	Strong evidence “Simkiss Control Systems, part of United Infrastructure Group, is a trusted name in the field of industrial automation and control systems.” Source: RevenueBase Database · checked Sep 28, 2026
18	AES Control Systems	Strong evidence	Northampton, United KingdomHQ checked Sep 28, 2026	51-200	45 contacts →
	Strong evidence “AES is a leading provider of intelligent building control system solutions.” Source: RevenueBase Database · checked Sep 28, 2026
19	AET Flexible Space	Indirect evidence	East Grinstead, United KingdomHQ checked Sep 28, 2026	11-50	43 contacts →
	Indirect evidence “AET Flexible Space has been redefining how buildings breathe since 1993.” Source: RevenueBase Database · checked Sep 28, 2026
20	B-Engineering Group Certified B Corp	Indirect evidence	Warrington, United KingdomHQ checked Sep 28, 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 28, 2026
21	Core Controls LTD	Partial evidence	Ilkeston, United KingdomHQ checked Sep 28, 2026	11-50	37 contacts →
	Partial evidence “Core Controls, part of Ipsum Group, are pioneers in the integration, control and automation of complex infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026
22	Link Media Systems	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	37 contacts →
	Strong evidence “We are systems integrators.” Source: RevenueBase Database · checked Sep 28, 2026
23	Tftull Limited	Strong evidence	Watford, United KingdomHQ checked Sep 28, 2026	51-200	37 contacts →
	Strong evidence “Since 1967 tftull has been specialising in the design, engineering, manufacture, installation, commissioning & maintenance of building management control systems and panels.” Source: RevenueBase Database · checked Sep 28, 2026
24	Principal Hvac	Strong evidence	Belfast, United KingdomHQ checked Sep 28, 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 28, 2026
25	ONE Sightsolutions LTD	Indirect evidence	Hartley Wintney, United KingdomHQ checked Sep 28, 2026	11-50	33 contacts →
	Indirect evidence “https://onesight.solutions/ Here at One Sightsolutions we are the leading UK supplier of reputable building automation and energy management products & services.” Source: RevenueBase Database · checked Sep 28, 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 control systems integrators. 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 control systems integrators.
Partial evidence: Its own public description names part of hvac control systems integrators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hvac control systems integrators. 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 760 hvac control systems integrators based in the United Kingdom

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Hvac control systems integrators based in the United Kingdom at a glance

As of Sep 28, 2026

38.9%Verified-email coverage

8.8Average contacts per company

1-10Median size (employees)

11.2%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

405

11-50

276

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 760 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 control systems integrators, 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 control systems integrators”. 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 control systems integrators), 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 control systems integrators, 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, 2,613 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 28, 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 control systems integrators by metro

Hvac control systems integrators in London85

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 control systems integrators, 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 control systems integrators are there based in the United Kingdom?

RevenueBase identified 760 hvac control systems integrators 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 control systems integrators?

London leads with 85 headquartered companies, followed by Glasgow (14) and Bristol (13).

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 2,613 verified decision-maker contacts tracked across these 760 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 28, 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.