Company lists · Data refreshed October 2026

Top 25 Hvac and energy efficiency companies based in the United Kingdom

RevenueBase identified 2,018 company matches for hvac and energy efficiency companies associated with the United Kingdom as of October 2026 and tracks 18,029 professional contacts across them, including 6,215 with verified work emails. London is the largest hub.

This list covers company matches for hvac and energy efficiency companies 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 October 14, 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 Oct 14, 2026 How this list was built
2,018Companies
18,029Contacts tracked
6,215Verified emails
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The 25 largest hvac and energy efficiency companies based in the United Kingdom

Ranked by team size
Top 25 of 2,018 company matches for hvac and energy efficiency companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 14, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchWeybridge, United KingdomHQ recorded Oct 14, 2026201-500411 contacts →

Exact match

“Experts in our field, Daikin UK is a leading supplier of heating, cooling and refrigeration solutions for commercial, residential and industrial applications.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
2Exact matchBristol, United KingdomHQ recorded Oct 14, 2026201-500324 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 · Oct 14, 2026 · View company records in RevenueBase
3Exact matchGlasgow, United KingdomHQ recorded Oct 14, 2026201-500310 contacts →

Exact match

“Star Refrigeration is a globally diversified cooling, heating, freezing, mechanical and electrical group of companies.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
4Exact matchPetersfield, United KingdomHQ recorded Oct 14, 20261,001-5,000246 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 · Oct 14, 2026 · View company records in RevenueBase
5Exact matchBelper, United KingdomHQ recorded Oct 14, 2026501-1,000190 contacts →

Exact match

“What does it take to deliver confidence at every stage of the heating journey?”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
6Exact matchBristol, United KingdomHQ recorded Oct 14, 202651-200151 contacts →

Exact match

“MCS Ltd are specialist building services engineers covering all aspects of commercial and industrial building services and infrastructure engineering across varying market sectors.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
7Exact matchAshby-de-la-zouch, United KingdomHQ recorded Oct 14, 2026501-1,000148 contacts →

Exact match

“Swegon is a market leading supplier of energy efficient indoor climate, cooling and life safety systems.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
8Exact matchCheam, United KingdomHQ recorded Oct 14, 202651-200141 contacts →

Exact match

“We are a building services company specialised in Mechanical and Public Health sectors, carrying out heating, air conditioning, plumbing and domestic services.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
9Exact matchCheam, United KingdomHQ recorded Oct 14, 2026201-500139 contacts →

Exact match

“Smith & Byford is a family-owned and operated building services company.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
10Exact matchCambridge, United KingdomHQ recorded Oct 14, 2026201-500136 contacts →

Exact match

“Adcock Refrigeration and Air Conditioning design, install, service and care for systems in commercial, industrial and individual residential premises right across the UK.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Oct 14, 2026201-500125 contacts →

Exact match

“Cilantro Engineering is a multi-discipline Building Services Contractor offering a vast range of Mechanical and Electrical Design & Installation services.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
12Exact matchHull, United KingdomHQ recorded Oct 14, 202651-200119 contacts →

Exact match

“Neil Fisher started Airco in 1991.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
13Exact matchCramlington, United KingdomHQ recorded Oct 14, 202651-200107 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
14Exact matchEastbourne, United KingdomHQ recorded Oct 14, 2026201-500105 contacts →

Exact match

“Hotchkiss is the UK's leading air conditioning and ventilation contractor.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
15Exact matchMelbourn, United KingdomHQ recorded Oct 14, 2026201-500101 contacts →

Exact match

“JCW Energy Services is a privately held SME business operating in the building services engineering sector throughout the UK.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
16Exact matchCamberley, United KingdomHQ recorded Oct 14, 2026201-500101 contacts →

Exact match

“Zehnder Group is a leading international provider of indoor climate solutions, offering a comprehensive range of products and services for comfortable and healthy living…”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
17Exact matchLoughton, United KingdomHQ recorded Oct 14, 202651-200100 contacts →

Exact match

“Woodford specialise in mechanical and electrical building services for the construction market.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
18Exact matchWoking, United KingdomHQ recorded Oct 14, 202651-20099 contacts →

Exact match

“SAV Systems is an established provider of energy-efficient heating and ventilation solutions.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
19Exact matchPulborough, United KingdomHQ recorded Oct 14, 202651-20098 contacts →

Exact match

“With over 40 years of experience in building services engineering, Sowga, a Pareto company, is a trusted provider of mechanical and electrical engineering, maintenance, and…”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
20Exact matchStockton-on-tees, United KingdomHQ recorded Oct 14, 202651-20091 contacts →

Exact match

“At Aircon Group, we’re dedicated to providing exceptional levels of customer service in Air Conditioning, Refrigeration, and Air-Source Heating Services, which we have done for…”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
21Exact matchEdenbridge, United KingdomHQ recorded Oct 14, 202651-20091 contacts →

Exact match

“Nationwide Air Conditioning Limited is a carbon-neutral business that has been exceeding customer expectations since 2001.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
22Exact matchCambridge, United KingdomHQ recorded Oct 14, 202651-20086 contacts →

Exact match

“CPS Building Services Ltd are experts in design, installation and maintenance of all mechanical and electrical services including renewables.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
23Exact matchShepperton, United KingdomHQ recorded Oct 14, 202651-20082 contacts →

Exact match

“Accent Services has served the air conditioning industry since 1978, growing in experience to become one of the industry’s leading specialist organisations by providing a full…”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
24Exact matchNewtownabbey, United KingdomHQ recorded Oct 14, 202651-20081 contacts →

Exact match

“Established in 1955, we are a leading mechanical and electrical building services engineering contractor operating throughout the United Kingdom and Ireland.”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Oct 14, 2026201-50078 contacts →

Exact match

“Who are we?”

Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase

Showing 25 of 2,018 hvac and energy efficiency companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 6,215 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Hvac and energy efficiency companies based in the United Kingdom at a glance

As of Oct 14, 2026
34.5%Verified-email coverage
8.9Average contacts per company
1-10Median size (employees)
8.6%Largest-city concentration · London
Oct 14, 2026Page data refreshed

Companies by employee count

1-10
1,004
11-50
796
51-200
164
201-500
24
501-1,000
4
1,001-5,000
6
5,001-10,000
2
10001+
2

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 2,018 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 “hvac and energy efficiency companies” 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 6,215 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 October 14, 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 “hvac and energy efficiency companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many hvac and energy efficiency companies are there based in the United Kingdom?

RevenueBase identified 2,018 company matches for hvac and energy efficiency companies associated with the United Kingdom as of October 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?

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

Which city has the most hvac and energy efficiency companies?

London leads with 173 company records, followed by Birmingham (30) and Bristol (29).

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 6,215 professional contacts with verified work emails tracked across these 2,018 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 October 14, 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.