HVAC Companies Using Cloudflare in the UK: 639 Active Firms (2026)
UK HVAC firms running managed edge web infrastructure secure customer portals, quote journeys and service content for a national market.
For HVAC operators, an edge web layer usually sits between a practical sales channel and a distributed service operation. It keeps branch pages, quote forms, customer logins, technical documents and media-heavy service content available while filtering nuisance traffic before it reaches the core site. Adoption tends to signal that web ownership has moved beyond a brochure site: marketing needs measurable inbound demand, operations need dependable service communication, and IT or an external agency has budget for managed performance and security controls. It is more typical of a mid-market operator with branch and field-service complexity than of a single-locality installer.
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Adoption is broad but not universal: 639 trading UK HVAC firms run the stack. Reported employment across the cohort totals 2,825. Among content-delivery network users in this sector, the stack accounts for 94.7% and ranks first by adoption share rather than turnover. Registered addresses skew southern but are not London-only: South East accounts for 16.3% of the cohort, London 13.6%, East of England 12.4%, North West 11.4%, and South West 10.3%.
Procurement scrutiny usually sits around the web estate rather than HVAC licensing itself. Customer portals, quote forms and maintenance requests can carry personal details, site-access information and service history, so buyers will often ask how traffic is filtered, where logs sit, how incidents are handled, and which third parties process web traffic. Public-sector and healthcare estates add a slower approval rhythm, with more attention to resilience, audit trails and supplier assurance. The stack also tends to be agency-managed: content management, analytics, form handling and anti-bot tooling commonly sit alongside the edge layer, creating a governance problem if ownership is split across marketing, IT and operations.
Future adoption appears tied to website consolidation rather than a new buying wave. Many HVAC groups still carry branch-level pages, legacy forms and agency-built content systems, so migration pressure tends to arise when quote handling, customer portals or search visibility become operational problems. Managed edge services may also be bundled into wider web-maintenance retainers, which makes vendor choice less visible to the end customer. The more mature adopters are likely to formalise ownership across marketing, IT and service operations; smaller contractors may keep using the stack indirectly through agencies, with less internal control over policy, logging and change management.
What’s in the file
One row per company, 50+ columns — everything below plus each company’s verified directors, from Companies House filings.
Company data
Verified directors — included
Active director count is the full Companies House board, so it can be higher than the number of names listed — we leave out nominee and formation-agent directors, who aren’t worth contacting. It’s blank for the small number of companies whose officers we haven’t fetched yet.
You’re charged per business, not per row. Where a business trades through several registered companies you get every one, and the Group Primary column marks one row per business — filter to those and the count matches your invoice. Rows sharing a website are not automatically one business: franchises and multi-site operators each count separately, and where names don’t prove a relationship we count them apart rather than guess.
Adoption by company size
Adoption of Cloudflare rises with company size across the trading UK HVAC companies in this cohort. 1.7% of the 23,256 companies with under 10 employees run Cloudflare (405 detected). 17.8% of the 1,144 companies with 10–50 employees run Cloudflare (204 detected). 27.7% of the 83 companies with over 50 employees run Cloudflare (23 detected). That is a 26% gap between the over 50 employees and under 10 employees bands.
639
Active firms
2026
94.7%
Of detected CDN share
UK HVAC
7
Median headcount
Filed accounts
1,307
Verified directors
Across this cohort
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Key facts
About 7% of the trading cohort reports turnover above £5M (46 of 639 firms) — the rest sits below that revenue band.
5% of the cohort was incorporated since 2022 (36 firms), so a sizeable share is in its first few filing cycles.
Within HVAC firms with a detectable CDN, this edge web-infrastructure system accounts for 94.7% of detections (639 of 675), ahead of the next three systems at 1.9% (13), 1.8% (12) and 1.6% (11).
The cohort is spread across several registered regions, led by the South East at 16.3% (104), London at 13.6% (87) and the East of England at 12.4% (79).
Website stacks are CMS-led: 58.4% (373) also run a common open-source CMS, while 42.1% (269) run web analytics and 36.2% (231) run bot checks or form protection.
Field Services & Trades covers 100.0% (639) of the cohort, with Construction tags on 39.0% (249) and Renewable Energy on 15.0% (96).
CDN market share among UK HVAC
Share of the 675 UK HVAC with a detectable system. As of June 2026.
What else do Cloudflare-running HVAC run?
Share of the 639 Cloudflare-running UK companies where each technology was also detected. As of June 2026.
Where Cloudflare HVAC are, and how healthy they look
By region
By registered-office region; companies without a regional match count toward Rest of UK.
By financial health
From filed accounts; firms with fewer than two filings show as insufficient history.
7
Median headcount
£720.8K
Median UK turnover
7.2%
Above £5M turnover
36
Incorporated since 2022
Verified directors — included in the file
Director names and roles for these 1,042 businesses, alongside financials and websites, in one Excel + CSV file.
Top UK HVAC using Cloudflare
Ranked by sales-readiness score: an AI model assesses what each company does, its sector and size, and scores its overall fit. Best-fit prospects appear first.
Financial sub-scores
Computed from 5 filingsDesigns, installs and maintains HVAC and building services systems including air conditioning, refrigeration, chillers, ventilation, heating and electrical systems. Provides planned maintenance,…
Serves UK businesses, public-sector bodies and facilities managers with commercial sites, including healthcare providers, hospitals, offices, telecoms sites, sports venues and contractors requiring…
Financial Health
StrongStrong · Profitable, Growing, Hiring · 11% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsDesigns, installs and maintains industrial and commercial refrigeration, air conditioning and ventilation systems. Provides system assessments, energy management, commissioning, repairs and planned…
Serves UK businesses and organisations needing cooling and climate systems, including food and drink manufacturers, cold storage and logistics operators, hospitality venues, retailers, education…
Financial Health
StrongStrong · Growing, Hiring · 13% CAGR over 2y
Location
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Financial sub-scores
Computed from 4 filingsProvides design, installation, maintenance and repair of commercial air conditioning and refrigeration systems. Services include HVAC systems, VRF units, chillers, ventilation, heat pumps, energy…
Serves B2B and public-sector clients needing commercial temperature-control support, including offices, facilities management partners, data centres, healthcare, hospitality, manufacturing, swimming…
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 3y
Location
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Financial sub-scores
Computed from 3 filingsProvides building engineering and facilities services including MEPH planned and reactive maintenance, HVAC and electrical systems servicing, M&E fit‑out and infrastructure projects, critical system…
Serves B2B property owners, developers and facilities managers across UK developments, including heritage and leisure venues, commercial offices, estates and business parks, life sciences and…
Financial Health
StrongStrong · Profitable, Growing · 2% CAGR over 2y
Location
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Financial sub-scores
Computed from 4 filingsProvides installation, servicing and repair of commercial air conditioning and mechanical ventilation systems. Also delivers electrical services including safety testing, LED lighting upgrades and EV…
Serves UK businesses and public-sector organisations, including offices, schools, hospitals, universities, government buildings, retailers, manufacturers, healthcare providers, gyms and leisure…
Financial Health
StrongStrong · Growing, Hiring · 7% CAGR over 3y
Location
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Financial sub-scores
Computed from 3 filingsProvides mechanical and electrical building services for commercial and industrial sectors, including design, installation and maintenance of air conditioning, heating, ventilation, refrigeration,…
Serves commercial, industrial and public sector organisations nationwide, including defence, hospitality, retail, healthcare, government and education clients needing building services support.
Financial Health
StrongStrong · Growing, Hiring · 10% CAGR over 2y
Location
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Financial sub-scores
Computed from 2 filingsProvides installation, maintenance, repair and supply of commercial refrigeration and air conditioning systems, including cold room design and manufacture, equipment servicing, and temporary cool…
Sells primarily to businesses and public sector organisations needing commercial refrigeration and air conditioning, including leisure, retail and other commercial operators, across most of the UK.
Financial Health
HealthyHealthy · Growing · 0% CAGR over 1y
Location
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Financial sub-scores
Computed from 5 filingsProvides HVAC contracting services including air handling unit (AHU) installation, refurbishment and maintenance, ventilation upgrades, electrical installation, and building management control…
Serves building operators, facilities leaders and estates teams at critical UK estates, including Tier 1 FM firms, NHS Trusts, public sector estates, car manufacturers and ventilation equipment OEMs.
Financial Health
StrongStrong · Hiring · 37% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides installation, servicing, maintenance and repair of commercial and industrial HVAC systems, including air conditioning, heat pumps, warm air and water heating, and bespoke air handling…
Serves B2B and public-sector organisations in the Midlands, including offices, data centres, FM companies, manufacturers, logistics sites, healthcare providers, schools, councils, hospitality venues…
Financial Health
HealthyHealthy · -67% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides building services maintenance and facilities management for commercial and industrial properties, covering mechanical and electrical systems. Services include plumbing, heating, air…
Serves industrial and commercial organisations, corporate PLCs, local government, central government and MOD clients, primarily buyers managing facilities and building maintenance contracts.
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsProvides HVAC and mechanical engineering services including design, installation, servicing, maintenance and repair of heating, ventilation, air conditioning and refrigeration systems. Also delivers…
Serves businesses and organisations of all sizes across the UK, including car showrooms, healthcare providers, hospitality and leisure venues, offices, warehousing and logistics sites, residential…
Financial Health
HealthyHealthy · -8% CAGR over 2y
Location
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Computed from 5 filingsProvides mechanical and electrical engineering services, including installation and maintenance of heating, ventilation, air conditioning, chilled water, and ventilation systems. Also undertakes…
Serves UK businesses and organisations with commercial, retail and industrial sites, including facilities managers, contractors, large client teams and grid-scale energy storage project developers.
Financial Health
StrongStrong · Growing, Hiring · 50% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides design, installation, maintenance and repair of HVAC and air conditioning systems, ventilation, commercial plumbing and process pipework. Also installs UV air purification and other…
Serves public and private sector clients, including design-and-build contractors, main contractors, landlords, tenants and end users in commercial offices, education, healthcare, care homes,…
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides HVAC system design, installation, servicing and maintenance for commercial and industrial buildings. Specialises in large chiller plant installation and replacement, energy management…
Serves B2B industrial and commercial building operators, construction and facilities maintenance teams, including data centres, across England and Wales with complex HVAC and energy management needs.
Financial Health
StrongStrong · Growing, Hiring · 26% CAGR over 4y
Location
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Financial sub-scores
Computed from 2 filingsProvides facilities and building maintenance services for commercial properties, including gas, plumbing and heating, HVAC, air conditioning, and electrical systems. Delivers planned preventative…
Serves UK organisations with commercial buildings and estate portfolios, including facilities teams in leisure, hospitality, education, defence, industrial, healthcare, public sector, retail and…
Financial Health
HealthyHealthy · Profitable · 6% CAGR over 1y
Location
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Financial sub-scores
Computed from 5 filingsProvides HVAC and refrigeration installation, repair and maintenance services, including air conditioning, ventilation systems, duct cleaning and plumbing. Also conducts PAT testing, fire damper…
Serves B2B and public-sector organisations across Northern Ireland and Ireland, including education, healthcare, hospitality, commercial and industrial sites, leisure, retail and government…
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 4y
Location
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Computed from 3 filingsProvides commercial property maintenance and facilities services including mechanical and electrical maintenance, planned preventative maintenance, HVAC servicing, plumbing and boilers, emergency…
Serves B2B commercial property owners, occupiers, managing agents and property consultants across sectors including education, healthcare, build-to-rent, student accommodation, retail and hospitality.
Financial Health
StrongStrong · Growing, Hiring · 44% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides rental of industrial cooling and heating equipment including chillers, boilers, air conditioning units, heaters and air handling systems. Offers delivery, installation and support for…
Serves B2B and public sector customers, including healthcare, education, data centres, construction, manufacturing, food and beverage, cold chain operators, and facilities, HVAC, M&E and…
Financial Health
StrongStrong · Growing, Hiring · 58% CAGR over 4y
Location
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Computed from 4 filingsProvides rental of temporary heating and cooling equipment including packaged and electric boilers, chillers, air conditioning units, heaters, heat pumps, pumps, and refrigeration trailers for…
Serves businesses and public-sector organisations, including education, construction, facilities management, local authorities, healthcare, leisure and tourism, and residential care homes needing…
Financial Health
StrongStrong · Growing, Hiring · 104% CAGR over 3y
Location
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Computed from 5 filingsProvides installation, maintenance and repair of commercial refrigeration and air conditioning systems. Offers planned preventative maintenance, emergency call-out services, and sales of cooling…
Serves businesses and organisations across the UK that operate refrigeration or air conditioning equipment, including hospitality, leisure and commercial sites needing installation, maintenance and…
Financial Health
HealthyHealthy · Hiring · 3% CAGR over 5y
Location
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Computed from 4 filingsProvides building and facilities maintenance services including gas, mechanical and electrical works, HVAC servicing, oil and fuel system services, fire regulation compliance, commercial…
Serves businesses, commercial property owners and facilities managers needing building services, reactive maintenance, refurbishment and compliance support across gas, electrical, mechanical, HVAC,…
Financial Health
StrongStrong · Growing, Hiring · 71% CAGR over 3y
Location
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Computed from 5 filingsDesigns, supplies and installs heating, ventilation and air conditioning (HVAC) control systems and building management systems. Provides control panels, standalone controllers, system upgrades,…
Serves B2B clients with buildings requiring HVAC and energy control, including facilities managers, property owners and organisations across multiple industries, from small sites to larger…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 4y
Location
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Computed from 5 filingsProvides installation, maintenance and repair of air conditioning, commercial refrigeration, ventilation and air source heat pump systems. Designs and installs cold storage and cooling systems for…
Sells to commercial and industrial customers across the UK, including offices, warehouses, restaurants, hotels, laboratories and retail sites, plus some residential property owners needing heat pump…
Financial Health
HealthyHealthy · Growing · 2% CAGR over 5y
Location
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Computed from 5 filingsProvides installation, maintenance, repair and cleaning services for cold rooms and cold stores used in chilled and frozen storage. Offers planned preventative maintenance, emergency call-outs,…
Sells to businesses operating temperature-controlled facilities, including supermarkets, distribution centres, and food or pharmaceutical manufacturers. Serves coldroom and coldstore owners,…
Financial Health
HealthyHealthy · -48% CAGR over 4y
Location
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Computed from 5 filingsProvides installation, repair and maintenance of air conditioning, commercial refrigeration and ventilation systems. Services commercial catering equipment, kitchen extraction, boilers, dishwashers,…
Serves business and public sector customers needing facilities engineering, including commercial kitchens, hospitality venues, organisations with catering operations, and sites requiring air…
Financial Health
StrongStrong · Growing, Hiring · 16% CAGR over 4y
Location
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Computed from 5 filingsProvides industrial and commercial heating and cooling services, including installation of warm air and radiant heating systems, process heating equipment, and destratification fans. Offers…
Serves B2B customers in industrial and commercial sectors, including landlords, business owners, manufacturers, factories, warehouses, retail premises, workshops, distribution centres, leisure…
Financial Health
HealthyHealthy · -3% CAGR over 4y
Location
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Computed from 5 filingsProvides electrical and mechanical building services for commercial and industrial facilities, including plumbing, air conditioning, chilled water and steam systems, heating plant rooms, ventilation…
Serves B2B and public sector customers in commercial and industrial markets, including SMEs, local authorities, government bodies and educational institutions, as well as organisations in leisure,…
Financial Health
StrongStrong · Growing, Hiring · 94% CAGR over 4y
Location
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Computed from 3 filingsSupplies, installs and services HVAC equipment including ventilation systems, air handling units, fans, diffusers, and heating and cooling systems. Provides room climate control products, air…
Serves B2B HVAC contractors, consultants, facilities teams and building owners/developers across hotels, offices, schools, retail, residential, public buildings, data centres, sports facilities and…
Financial Health
HealthyHealthy · Profitable, Hiring · 10% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides installation, servicing and maintenance of air conditioning and refrigeration systems for commercial and industrial clients. Also offers system support and facilities-related services to…
Serves businesses, facilities managers and property operators that use air conditioning or commercial refrigeration systems, including organisations needing ongoing maintenance and support for…
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 4y
Location
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Computed from 5 filingsDesigns, installs and maintains industrial heating, ventilation and air conditioning systems. Supplies radiant heaters, boilers, warm air heating, extraction and input ventilation, and heat‑pump air…
Serves B2B customers with industrial and retail premises, including factories, workshops, warehouses, offices, shopping centres and showrooms across the UK.
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
Location
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Computed from 3 filingsProvides HVAC and air handling unit (AHU) services including repair, refurbishment, replacement, and maintenance. Supplies and installs bespoke AHUs, kitchen ventilation and heat recovery units, and…
Serves B2B customers in commercial, industrial and healthcare sectors, including facilities managers and organisations responsible for AHU/HVAC assets in buildings of varying scale.
Financial Health
HealthyHealthy · Hiring · 19% CAGR over 2y
Location
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Computed from 5 filingsProvides installation, servicing, repair and maintenance of commercial and residential air conditioning, refrigeration, heating and heat pump systems. Also offers electrical, ventilation, drainage…
Serves businesses and domestic customers across the South East, including hotels, office blocks, supermarkets, commercial kitchens, care homes, leisure centres, schools, universities, and homeowners…
Financial Health
StrongStrong · Growing, Hiring · 18% CAGR over 5y
Location
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Computed from 5 filingsDesigns, installs and maintains building energy management systems (BEMS) and environmental control systems. Provides project delivery, upgrades and planned maintenance for HVAC and building control…
Serves businesses and institutions across the UK that operate large commercial buildings, including exhibition centres, hotel groups, law firms and universities.
Financial Health
StableStable · -62% CAGR over 4y
Location
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Computed from 3 filingsDesigns and implements building energy management and control systems (BEMS/BMS) for buildings. Provides system integration with HVAC, lighting and access controls, plus energy metering, remote…
Serves developers, main contractors, facilities teams and estate owners across the UK and Ireland, including hospitals, universities and other commercial or public-sector buildings.
Financial Health
StrongStrong
Location
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Computed from 5 filingsSupplies air conditioning, heating and refrigeration equipment including wall‑mounted AC units, heaters, fans, ventilation and extraction systems, and dehumidifiers. Provides HVAC spare parts and…
Serves UK residential, commercial and industrial customers, including contractors and facilities buyers for workshops, schools, warehouses, nurseries, showrooms, construction sites, server rooms and…
Financial Health
HealthyHealthy · Growing · 0% CAGR over 5y
Location
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Computed from 5 filingsDesigns, installs and maintains mechanical building services including air conditioning, ventilation systems, commercial plumbing and heating, air curtains and air source heat pumps, providing…
Serves retail, leisure, commercial and public sector organisations across the UK, targeting building owners, facilities managers and businesses needing mechanical services for their premises.
Financial Health
HealthyHealthy · -4% CAGR over 4y
Location
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Computed from 3 filingsProvides mechanical, electrical and plumbing (MEP) building services including system design, BIM/CAD coordination, installation and maintenance of heating, air conditioning, ventilation, drainage,…
Serves public sector bodies, private businesses and high-end residential property owners, including schools, laboratories, restaurants and bars, hotels, offices, medical centres and listed or prime…
Financial Health
StrongStrong · Hiring · 11% CAGR over 2y
Location
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Computed from 5 filingsProvides installation, maintenance and servicing of commercial refrigeration and air conditioning systems. Engineers support equipment commissioning, repairs and routine servicing for businesses…
Serves B2B customers with commercial refrigeration and air-conditioning needs, including foodservice retailers, catering equipment companies, scientific/medical equipment firms and other multi-site…
Financial Health
HealthyHealthy · Hiring · 59% CAGR over 4y
Location
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Computed from 4 filingsOperates a group of companies providing mechanical, electrical, plumbing, HVAC, and facilities management services. Activities include planned preventative maintenance, reactive maintenance, building…
Serves commercial clients needing M&E/FM support and targets independent mechanical, electrical, HVAC and facilities management service businesses seeking a collaborative group platform.
Financial Health
StrongStrong · Hiring · 71% CAGR over 3y
Location
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Computed from 5 filingsProvides commercial facilities management and building engineering services including HVAC installation and maintenance, electrical and plumbing works, property maintenance, office and washroom…
Serves businesses and public-sector organisations managing commercial buildings across Bristol, Cardiff and the Southwest, including schools, transport depots and multi-site operators.
Financial Health
StableStable · Hiring · 5% CAGR over 4y
Location
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Computed from 5 filingsProvides sales, maintenance, repair and hire of industrial water chillers and cooling systems. Offers emergency breakdown support, planned preventative maintenance, system diagnostics and supply of…
Serves B2B industrial and manufacturing organisations across the UK, including automotive suppliers, plastics and packaging firms, breweries, pharmaceuticals, laboratories, machine tooling,…
Financial Health
StrongStrong · Hiring · 35% CAGR over 4y
Location
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Computed from 5 filingsProvides air conditioning and refrigeration services including system design, installation, maintenance, and breakdown repairs. Supplies portable heating and cooling units and offers planned…
Serves a mix of B2B and residential customers nationwide, including commercial and industrial premises, workplaces, medical facilities, theatres and organisations with refrigeration or…
Financial Health
StableStable · -13% CAGR over 5y
Location
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Computed from 5 filingsProvides mechanical and electrical installation, maintenance and facilities management services for commercial, industrial and residential buildings. Services include HVAC, electrical systems,…
Serves B2B and some residential customers, including facilities teams, property managers and developers across commercial, industrial and high-end domestic premises. Targets sectors such as…
Financial Health
StableStable · -63% CAGR over 4y
Location
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Computed from 3 filingsProvides HVAC engineering services including design, installation, maintenance and repair of air conditioning, refrigeration, plumbing, heating, ductwork and ventilation systems. Also delivers…
Serves commercial, industrial and domestic customers, including businesses, facilities or property managers, and homeowners with HVAC, plumbing, heating, ventilation and renewable energy requirements.
Financial Health
StrongStrong · Growing · 0% CAGR over 2y
Location
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Computed from 4 filingsProvides design, supply, installation and maintenance of heating, ventilation, air conditioning and plumbing systems for commercial and industrial buildings, including gas, LPG and oil pipework,…
Serves B2B and public-sector customers managing commercial or industrial buildings, including small industrial units, offices, mills, schools, churches, retail park units and aircraft hangars.
Financial Health
StrongStrong · Growing · 1% CAGR over 3y
Location
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Computed from 5 filingsProvides facilities management and mechanical and electrical (M&E) engineering services for residential and commercial buildings. Delivers planned maintenance, M&E project management, heating and…
Serves B2B and public-sector property owners, operators and facilities managers, especially in the UK living sector, including PBSA, Build-to-Rent, offices, retail and leisure assets, and care homes.
Financial Health
StrongStrong · Hiring · 38% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsDesigns, supplies and installs commercial air conditioning systems. Provides ventilation and air handling installation, heating and public health services, electrical and BMS installations,…
Serves B2B commercial clients across the South of England, particularly office CAT A and CAT B fit-out projects, contractors, developers and facilities teams needing building services support.
Financial Health
StrongStrong · Growing, Hiring · 44% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsProvides mechanical and electrical building services including HVAC installation, electrical systems, plumbing and heating, and building management systems. Offers design, project management and…
Serves public-sector and commercial organisations, especially hospitals, healthcare estates, education providers and government sites, plus businesses with complex mechanical, electrical and HVAC…
Financial Health
StrongStrong · Hiring · 37% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides design, installation and maintenance of energy‑efficient HVAC systems, including air conditioning and ventilation, along with electrical installations, facilities management, and solar and…
Serves commercial, hospitality and industrial organisations, plus residential homeowners, with buyers including property owners, facilities teams and managers responsible for buildings, premises and…
Financial Health
StrongStrong · Hiring · 18% CAGR over 5y
Location
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How Cloudflare usage is detected
Company data
Detected companies are joined to UK Companies House records and XBRL accounts data. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.
Detection
Firmbase crawls the public website of actively-trading UK companies and fingerprints the technologies present: tracking scripts, embedded forms, chat widgets, CMS markers and similar signatures. A company is included in this list when one or more of the technology's signatures are found on its site; closely-related variants of the same product are grouped under one name. Detection covers what is visible on the public web — a company using the technology purely internally, with no website footprint, will not appear. Counts are therefore a conservative floor, not a ceiling. HVAC companies are identified using Firmbase's semantic classification of company activity, built from filings, websites and registered SIC codes rather than SIC codes alone. The detected counts and share figures on this page are computed within that sector cohort, so "share" always means share of HVAC companies with a detectable system — not of all UK companies.
Freshness
Websites are re-crawled on a rolling basis and the underlying company data is refreshed from Companies House continuously; filings appear within days of submission. The list and its statistics are regenerated when the detected cohort moves meaningfully. You can see the last-updated timestamp near the top of the page.
Cloudflare is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
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Frequently asked questions
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