Company lists · Data refreshed September 2026
Top 25 Rooftop unit services based in the United Kingdom
RevenueBase identified 388 rooftop unit services headquartered in the United Kingdom as of September 2026 and tracks 2,220 professional contacts across them, including 702 with verified work emails. London is the largest hub.
This list covers rooftop unit services 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 29, 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.
The 25 largest rooftop unit services based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 97 contacts → | ||||
Indirect 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 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 53 contacts → | ||||
Indirect evidence “BTU (Installation and Maintenance) Ltd, is a privately owned business based in Guildford, Surrey.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 40 contacts → | ||||
Indirect evidence “At ICH, we believe that every customer deserves to be more than just another number.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 34 contacts → | ||||
Indirect evidence “Principal HVAC are at the leading edge of Heating, Ventilation & Air conditioning systems for commercial and residential property.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 33 contacts → | ||||
Indirect evidence “Professional service supplying, installing and maintaining energy efficient HVAC systems.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 30 contacts → | ||||
Indirect evidence “A good environment can improve morale, productivity and employee retention.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 26 contacts → | ||||
Indirect 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 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 25 contacts → | ||||
Indirect evidence “John Heaney (Electrical) Limited (JHE Ltd) is an Electrical and Mechanical Company, specialising in all types of Industrial and Commercial Installations as well as Production Line…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 23 contacts → | ||||
Indirect evidence “Established in 1989, Airway Group have grown to become a premier provider of comprehensive air conditioning, building maintenance and property services working with commercial and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 22 contacts → | ||||
Indirect evidence “At PCB, we specialise in retail HVAC and mechanical projects.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 20 contacts → | ||||
Indirect evidence “Installation, Service & Maintenance of Air Conditioning.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 20 contacts → | ||||
Indirect evidence “CAM Refrigeration & Air Conditioning provides installation, service and maintenance across all HVAC sectors.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 20 contacts → | ||||
Indirect evidence “Password Services Air Conditioning Ltd have been trading since August 1998 and are continuously expanding thanks to the reputation we have earned for high level skills and service.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 17 contacts → | ||||
Indirect evidence “Your HVAC, Gas and Mechanical all under one roof.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 17 contacts → | ||||
Indirect evidence “Established in 1934 Montgomery Refrigeration has pioneered commercial refrigeration throughout Northern Ireland for over 80+ years.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 16 contacts → | ||||
Indirect evidence “KM Technical is one of UK’s leading provider of installation and service solutions in the areas of electrical installation, heating & plumbing and heating ventilation and air…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 16 contacts → | ||||
Indirect evidence “Born in Yorkshire.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 15 contacts → | ||||
Indirect evidence “AES Maintenance Ltd was launched in January 2008 to provide specialist Heating, Ventilation and Air Conditioning (HVAC) Engineering Skills to the Building Services sector.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 14 contacts → | ||||
Indirect evidence “Covering all aspects of HVAC, facilities management and electrical installation.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 14 contacts → | ||||
Indirect evidence “Heating, Plumbing, Air Conditioning, Electrical & BMS Installation, Servicing and Repair.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 13 contacts → | ||||
Indirect evidence “With over 35 years’ experience, Askews has become the ‘go to’ company for heating, ventilation and air conditioning services.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 13 contacts → | ||||
Indirect evidence “Air Options was founded in 1995 and offer high quality design, installation, maintenance, repair and refurbishment packages, to commercial and light industrial properties, in and…” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
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: rooftop unit services. 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 rooftop unit services.
- Partial evidence
- Its own public description names part of rooftop unit services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name rooftop unit services. 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 388 rooftop unit services based in the United Kingdom
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Rooftop unit services based in the United Kingdom at a glance
As of Sep 29, 2026Companies by employee count
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 388 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 rooftop unit services, 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 “rooftop unit services”. 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 rooftop unit services), 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 rooftop unit services, 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, 702 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 29, 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.
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 rooftop unit services, 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 rooftop unit services are there based in the United Kingdom?
RevenueBase identified 388 rooftop unit services 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?
Daikin Applied UK LTD, headquartered in Cramlington, tops this list with the largest team on record.
Which city has the most rooftop unit services?
London leads with 32 headquartered companies, followed by Basingstoke (5) and Stockport (5).
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 702 verified decision-maker contacts tracked across these 388 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 29, 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.
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