Company lists · Data refreshed September 2026

Top 25 Ventilation system contractors based in the United Kingdom

Name: Ventilation system contractors based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 857 companies tracked

RevenueBase identified 857 company matches for ventilation system contractors associated with the United Kingdom as of September 2026 and tracks 6,857 professional contacts across them, including 2,560 with verified work emails. London is the largest hub.

This list covers company matches for ventilation system contractors associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 19, 2026 How this list was built

857Companies

6,857Contacts tracked

2,560Verified emails

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The 25 largest ventilation system contractors based in the United Kingdom

Ranked by team size

Top 25 of 857 company matches for ventilation system contractors based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Colt International	Exact match	Petersfield, United KingdomHQ recorded Sep 19, 2026	1,001-5,000	505 contacts →
	Exact match “Since 1931 we have been harnessing the natural elements to provide healthy, comfortable and safe working and living conditions in buildings.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	Space Engineering Services LTD	Exact match	Bristol, United KingdomHQ recorded Sep 19, 2026	201-500	312 contacts →
	Exact match “Space Engineering Services is the UK’s leading provider of refrigeration, heating, ventilation and air conditioning services.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	Envirovent	Exact match	Harrogate, United KingdomHQ recorded Sep 19, 2026	201-500	200 contacts →
	Exact match “envirovent is the leading manufacturer and supplier of ventilation systems.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	VES	Exact match	Eastleigh, United KingdomHQ recorded Sep 19, 2026	201-500	167 contacts →
	Exact match “For over 55 years, VES has been at the heart of British manufacturing, delivering intelligent ventilation solutions that keep buildings running efficiently.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Vent-Axia	Exact match	Crawley, United KingdomHQ recorded Sep 19, 2026	201-500	153 contacts →
	Exact match “Established in 1936 when Joe Akester invented the world’s first electrically-operated window fan, Vent-Axia has been setting the standard for ventilation for over 85 years.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	SE Controls	Exact match	Lichfield, United KingdomHQ recorded Sep 19, 2026	51-200	136 contacts →
	Exact match “SE Controls is a leading international specialist in the design and delivery of intelligent smoke and environmental ventilation systems using façade automation as an integral part…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	ELTA	Exact match	Fareham, United KingdomHQ recorded Sep 19, 2026	51-200	124 contacts →
	Exact match “For over 50 years, Elta has been a leader in fan design and engineering, offering a diverse range of products for various applications.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	Hotchkiss LTD	Exact match	Eastbourne, United KingdomHQ recorded Sep 19, 2026	201-500	107 contacts →
	Exact match “Hotchkiss is the UK's leading air conditioning and ventilation contractor.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Gilberts Blackpool LTD	Exact match	Blackpool, United KingdomHQ recorded Sep 19, 2026	201-500	77 contacts →
	Exact match “Established in 1960, Gilberts is the UK’s leading designer and manufacturer of grilles, diffusers, louvres, smoke/fire dampers, and natural ventilation systems for the heating…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Greenmill AIR Conditioning And Ventilation	Exact match	Colchester, United KingdomHQ recorded Sep 19, 2026	51-200	65 contacts →
	Exact match “Greenmill is one of the UK's leading wholesalers of Air Conditioning and Ventilation Install products.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Chapman Ventilation Limited	Exact match	Welwyn Garden City, United KingdomHQ recorded Sep 19, 2026	51-200	65 contacts →
	Exact match “Restaurant ventilation for the likes of Nando's, Five Guys and The Ivy.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	Vent Engineering	Exact match	Poole, United KingdomHQ recorded Sep 19, 2026	51-200	60 contacts →
	Exact match “Vent Engineering are a specialist in natural and smoke ventilation systems and have been manufacturing, supplying, installing and commissioning ventilation systems since 1988 for…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	AIR Technology Systems	Exact match	Bromsgrove, United KingdomHQ recorded Sep 19, 2026	51-200	57 contacts →
	Exact match “Air Technology Systems Ltd (ATS) are design and project management specialist contractors focused on providing proprietary and energy saving, Climate Control & Ventilation…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	The FDS Group	Exact match	Dartford, United KingdomHQ recorded Sep 19, 2026	51-200	54 contacts →
	Exact match “We are experts in providing consultative fire engineering services and smoke ventilation systems for contractors, architects, consultants and developers.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	Systemair UK	Exact match	Birmingham, United KingdomHQ recorded Sep 19, 2026	51-200	54 contacts →
	Exact match “With our Head Office in Birmingham and a further 13 branches across the UK, we are ideally placed to offer our customers a fast efficient response to any enquiry for Ventilation &…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	BTU Installation & Maintenance LTD	Exact match	Guildford, United KingdomHQ recorded Sep 19, 2026	51-200	53 contacts →
	Exact match “BTU (Installation and Maintenance) Ltd, is a privately owned business based in Guildford, Surrey.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Imperial Ductwork Services LTD	Exact match	London, United KingdomHQ recorded Sep 19, 2026	201-500	45 contacts →
	Exact match “From its foundation in 1997, Imperial Ductwork Services Ltd (IDSL) has grown into one of the industry’s leading companies in the Manufacture and Installation of Ductwork…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Brookvent	Exact match	Belfast, United KingdomHQ recorded Sep 19, 2026	51-200	40 contacts →
	Exact match “Founded in 1984 by the visionary engineer Billy Divers, Brookvent has established itself as a trailblazer in the ventilation industry.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	AIR Plants Dust Extraction LTD	Exact match	Leicester, United KingdomHQ recorded Sep 19, 2026	51-200	39 contacts →
	Exact match “Air Plants offer the best solution for industries requiring highly efficient dust extraction and dust control ventilation systems on the market.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Airtemp AC LTD	Exact match	St Leonard's On Sea, United KingdomHQ recorded Sep 19, 2026	51-200	36 contacts →
	Exact match “We provide the design, manufacture, installation and service of air conditioning and ventilation systems across the UK.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	Medical AIR Technology	Exact match	Manchester, United KingdomHQ recorded Sep 19, 2026	51-200	36 contacts →
	Exact match “MAT supplies specialist critical ventilation solutions for the NHS, private healthcare providers, and life science facilities such as universities and research establishments.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Farmwood M&e Services LTD	Exact match	Sittingbourne, United KingdomHQ recorded Sep 19, 2026	11-50	34 contacts →
	Exact match “Ventilation and M&E company founded in 2002 by Dave Wood; the company has gone from strength to strength in the South-East, specialising in ventilation and air quality with a…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	Principal Hvac	Exact match	Belfast, United KingdomHQ recorded Sep 19, 2026	51-200	34 contacts →
	Exact match “Principal HVAC are at the leading edge of Heating, Ventilation & Air conditioning systems for commercial and residential property.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Quora Group	Exact match	North Shields, United KingdomHQ recorded Sep 19, 2026	51-200	33 contacts →
	Exact match “Professional service supplying, installing and maintaining energy efficient HVAC systems.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	London Ductwork Services T A RDS	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	33 contacts →
	Exact match “RDS is one of the leading ductwork manufacturer and installation companies in the Capital that has expanded over the years gaining more than 40 years experience in the industry.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “ventilation system contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 857 ventilation system contractors based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 2,560 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Ventilation system contractors based in the United Kingdom at a glance

As of Sep 19, 2026

37.3%Verified-email coverage

8.0Average contacts per company

1-10Median size (employees)

9.1%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

435

11-50

341

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 857 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “ventilation system contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 2,560 professional contacts with verified work emails across the full matched dataset. 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 19, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “ventilation system contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many ventilation system contractors are there based in the United Kingdom?

RevenueBase identified 857 company matches for ventilation system contractors associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Colt International tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most ventilation system contractors?

London leads with 78 company records, followed by Birmingham (16) and Manchester (16).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 2,560 professional contacts with verified work emails tracked across these 857 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 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 SmartSearch, 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.