HVAC Companies Using WordPress in the UK: 1,896 Active Firms (2026)
HVAC firms running a detected web CMS install, maintain and service heating, ventilation and cooling systems across the UK.
For HVAC contractors, running this CMS is usually less about publishing volume than converting technical demand into quotable work. The stack tends to sit with whoever owns marketing, sales administration or regional service coverage, not with a separate digital product team. Adoption signals a business with enough recurring maintenance, compliance documentation and case-study material to justify managed web upkeep, but still a preference for relatively plain publishing workflows. Typical sites support service-area pages, call-back forms, sector credentials and planned-maintenance propositions for commercial, industrial and public-sector buyers; at the upper end, the same setup carries multi-site tender credibility rather than a transactional online sales model.
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UK adoption is concentrated enough to make this the default CMS choice among detected HVAC sites: 1,896 actively trading firms are running it. Within the 2,718-firm detected-CMS base for the sector, it accounts for 69.8%, ahead of lower-share website-builder and hosted-CMS alternatives. The regional skew is southern but not London-only, with 16.8% in the South East, 13.1% in the East of England, 11.4% in the South West, 11.3% in London and 10.4% in the North West. Reported headcount across these adopters totals 3,455, pointing to a cohort weighted towards smaller contractors with a visible layer of larger service groups.
Procurement risk sits less in CMS choice than in the processes around it. HVAC buyers often ask for evidence of insurance, accreditation, safety documentation and call-out coverage before a site turns into an order, so web content has to support claims that can be checked during tendering. Forms, analytics tags and spam controls also bring privacy and cookie-consent work, particularly where enquiries include site addresses, plant details or named facilities contacts. The open plug-in model suits regional contractors that rely on agencies for updates, but it also creates a maintenance burden: patches, administrator access and abandoned extensions are operational issues, not just web-design details.
Adoption appears likely to persist where HVAC firms need editable regional pages, tender-support content and enquiry handling without maintaining a large internal web team. Pressure may come from hosted site builders bundling forms, analytics and security into simpler contracts, while larger service groups may prefer more controlled agency-managed builds. The cohort still looks practical rather than experimental: firms tend to use the CMS as a dependable marketing layer around referral-led and framework-led sales. Over time, consolidation among contractors and agency suppliers may reduce the long tail of lightly maintained sites, but replacement will probably be gradual.
Adoption by company size
Adoption of WordPress rises with company size across the trading UK HVAC companies in this cohort. 5.5% of the 23,256 companies with under 10 employees run WordPress (1,271 detected). 49.4% of the 1,144 companies with 10–50 employees run WordPress (565 detected). 65.1% of the 83 companies with over 50 employees run WordPress (54 detected). That is a 59.6% gap between the over 50 employees and under 10 employees bands.
1,896
Active firms
2026
69.8%
Of detected CMS share
UK HVAC
6
Median headcount
Filed accounts
3,868
Verified contacts
Across this cohort
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Key facts
About 6% of the trading cohort reports turnover above £5M (119 of 1,896 firms) — the rest sits below that revenue band.
5% of the cohort was incorporated since 2022 (109 firms), so a sizeable share is in its first few filing cycles.
WordPress accounts for 69.8% (1,896) of detected CMS use across 2,718 HVAC firms with a detectable system, ahead of Wix at 9.8% (267) and Cornerstone at 4.6% (124).
The cohort is concentrated in southern England, with South East 16.8% (318), East of England 13.1% (249), South West 11.4% (216) and London 11.3% (215).
Co-detected website tools point to enquiry-led sites: Yoast SEO appears on 51.3% (972), Google Analytics on 42.7% (809) and reCAPTCHA on 41.5% (787).
Construction is the largest adjacent sector tag in the cohort at 41.1% (780), followed by Renewable Energy at 14.9% (282).
CMS market share among UK HVAC
Share of the 2,718 UK HVAC with a detectable system. As of June 2026.
What else do WordPress-running HVAC run?
Share of the 1,896 WordPress-running UK companies where each technology was also detected. As of June 2026.
Where WordPress 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.
6
Median headcount
£689.8K
Median UK turnover
6.3%
Above £5M turnover
109
Incorporated since 2022
3,868 verified decision-maker contacts
across these 1,896 companies, with emails available in Firmbase. Filter by role, seniority and stack.
Top UK HVAC using WordPress
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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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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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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Computed from 5 filingsProvides commercial air conditioning, refrigeration, and ventilation services, including system installation, maintenance, repair, efficiency controls, and testing and compliance inspections for…
Serves B2B customers across Yorkshire and the UK, including hospitality venues, pubs and other commercial premises with refrigeration, air conditioning, ventilation and compliance needs.
Financial Health
HealthyHealthy · Hiring · 10% CAGR over 5y
Location
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Computed from 5 filingsDesigns, fabricates, installs and maintains HVAC and mechanical building services systems. Produces packaged plant rooms, pump and heat exchange skids, and provides heating, cooling, refrigeration…
Serves commercial, industrial and public-sector clients nationwide, including data centres, waste-to-energy operators, hotels and leisure venues, education providers, utilities, food manufacturers,…
Financial Health
StrongStrong · Growing · 1% CAGR over 4y
Location
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Computed from 5 filingsDesigns and installs HVAC systems for critical environments requiring precise temperature and humidity control. Provides chilled water systems, air conditioning, and mechanical ventilation, along…
Serves UK businesses operating critical environments, including data centres, laboratories, IT suites, offices, UPS and battery rooms, manufacturing facilities, and telecoms/IT modules requiring…
Financial Health
HealthyHealthy · Hiring · 68% CAGR over 5y
Location
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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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Computed from 5 filingsDesigns, supplies, installs and maintains commercial and industrial refrigeration and air‑conditioning systems. Provides process cooling, cold room and chiller installations, ventilation and…
Sells to businesses and some healthcare organisations needing commercial or industrial refrigeration, air conditioning and process cooling, including pharmaceutical, food and beverage, plastics,…
Financial Health
StableStable · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides installation, maintenance and repair of industrial and commercial refrigeration and air conditioning systems, including chillers, cold stores, ammonia systems, blast freezers, plate heat…
Serves B2B customers in the UK industrial and commercial market, including facilities with cold/chill stores, process cooling, ammonia systems and chillers, plus sectors such as healthcare.
Financial Health
StrongStrong · -2% CAGR over 4y
Location
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Computed from 5 filingsProvides design, installation, maintenance and repair of climate control systems including air conditioning, refrigeration, water chillers, air handling units, ventilation systems and data centre…
Sells to businesses and organisations needing climate control systems, including operators of data centres and facilities requiring air conditioning, refrigeration, ventilation and chillers. Serves…
Financial Health
StrongStrong · Growing, Hiring · 80% CAGR over 5y
Location
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Computed from 4 filingsDesigns, supplies, installs and maintains HVAC, refrigeration and chilled water systems for marine, commercial and industrial sectors. Provides engineering services including air conditioning,…
Serves B2B customers in marine, commercial and industrial sectors, including organisations operating vessels, facilities, catering environments and process sites needing refrigeration, HVAC or…
Financial Health
StrongStrong · Growing, Hiring · 4% CAGR over 3y
Location
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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 3 filingsDesigns and installs commercial air conditioning and HVAC systems for retail, office and commercial premises. Provides system planning, project management, and ongoing service, maintenance and repair…
Serves B2B customers in retail, office and wider commercial property sectors, including organisations with multi-site premises and ongoing maintenance contract requirements across the UK.
Financial Health
StrongStrong · Growing · 4% CAGR over 2y
Location
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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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Computed from 3 filingsSupplies, installs and services commercial and industrial refrigeration and air‑conditioning systems. Provides cold room installation, electrical works, planned maintenance, commissioning and…
Serves UK businesses and organisations with commercial or industrial sites that rely on refrigeration, air-conditioning or coldrooms, including operators needing compliant cooling for product…
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 2y
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 5 filingsProvides mechanical and electrical facilities management services, including HVAC maintenance, electrical services, building fabric works, and project and capital works. Also delivers asset…
Serves B2B and public-sector estates teams, including commercial and private organisations, local authorities, education providers, healthcare providers and leisure operators needing compliant…
Financial Health
StrongStrong · Growing, Hiring · 8% CAGR over 4y
Location
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Computed from 5 filingsProvides commercial heating and HVAC services including boiler servicing and planned preventative maintenance, emergency repairs, system design and installation, air conditioning and refrigeration,…
Serves commercial and public-sector organisations across the West Midlands and surrounding areas, including schools, colleges, factories, care homes, distribution centres, medical centres and sports…
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 4y
Location
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Computed from 4 filingsProvides refrigeration engineering, HVAC installation and maintenance, facilities management services, and communications room solutions. Supplies related spare parts and technical support for…
Serves businesses across the UK with commercial plant, refrigeration, HVAC and comms room environments, including organisations needing outsourced facilities management and technical maintenance…
Financial Health
HealthyHealthy · Profitable, Growing, Hiring · 8% CAGR over 3y
Location
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Computed from 3 filingsDesigns, supplies and installs commercial refrigeration and air conditioning systems, including cold rooms, chillers and bespoke cooling solutions. Provides maintenance, inspections and repairs for…
Serves businesses needing refrigeration and climate-control systems, including retail, hospitality, industrial operators, food processors and data centres, plus residential customers requiring air…
Financial Health
StrongStrong · Growing, Hiring · 11% CAGR over 2y
Location
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Computed from 3 filingsDesigns and installs commercial air conditioning, ventilation and mechanical building services systems. Provides mechanical and electrical turnkey projects, energy‑efficient HVAC solutions, system…
Serves B2B clients including building companies, architects, consultants and commercial end users, with projects for offices, business parks, heritage buildings, rail-related sites and multi-site…
Financial Health
StrongStrong · -2% CAGR over 2y
Location
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Computed from 2 filingsDesigns, manufactures and installs commercial refrigeration systems and display cabinets for retail, convenience and foodservice environments. Provides system design, logistics, installation and…
Serves retail, convenience and foodservice businesses, including supermarket chains, co-operatives and store operators with chilled or frozen display refrigeration needs.
Financial Health
StrongStrong · Growing, Hiring · 30% CAGR over 1y
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 filingsDesigns, installs and maintains air conditioning and building services systems for commercial environments. Provides HVAC installation, servicing and maintenance, and renewable energy solutions for…
Serves B2B and public-sector clients across the UK, including hotels and leisure venues, retailers, data centres, renewable energy sites, commercial property operators and private-sector…
Financial Health
HealthyHealthy · Growing · 0% CAGR over 4y
Location
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Computed from 5 filingsProvides mechanical and electrical engineering services including HVAC, air conditioning, ventilation, and building management systems. Designs, installs, and maintains energy monitoring, automation,…
Serves B2B and public sector customers, particularly contractors, property developers, consultants and end-users in education, local government, commercial and industrial building projects.
Financial Health
StrongStrong · Growing, Hiring · 43% CAGR over 4y
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Computed from 4 filingsProvides installation, maintenance and repair of HVAC and refrigeration systems, including air conditioning, air source heat pumps, ventilation, and gas and mechanical services. Also offers planned…
Serves UK businesses and organisations operating commercial buildings that require HVAC, refrigeration, gas and mechanical system support, including clients needing planned maintenance, reactive…
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 3y
Location
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Computed from 5 filingsDesigns, installs and maintains air conditioning systems for commercial and industrial buildings, providing system design, sales, servicing and lifecycle management, along with maintenance and…
Financial Health
HealthyHealthy · -5% CAGR over 4y
Location
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Computed from 4 filingsProvides design, installation, commissioning and maintenance of heating, ventilation, air conditioning and plumbing systems for construction projects. Offers fault diagnosis, servicing, water hygiene…
Serves private and public sector organisations in the UK construction and property sectors, including education, hospitals, care and community facilities, offices, industrial sites, arts venues,…
Financial Health
StrongStrong · Growing · 0% CAGR over 3y
Location
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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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Computed from 5 filingsDesigns, installs and services air conditioning, ventilation and building control systems. Provides VRV/VRF commissioning, health checks and optimisation, centralised control systems, planned…
Serves commercial property owners, facilities managers and organisations operating sites with air conditioning, ventilation and building control systems.
Financial Health
HealthyHealthy · Growing, Hiring · 6% CAGR over 4y
Location
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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
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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
StrongStrong · Growing, Hiring · 27% CAGR over 4y
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Computed from 3 filingsProvides installation, maintenance and repair of commercial refrigeration, air conditioning and HVAC systems. Also supplies and services commercial catering equipment and offers mobile cold room hire…
Serves business customers in commercial, industrial and retail sectors, including shops, restaurants and other retail outlets, with nationwide coverage.
Financial Health
HealthyHealthy · -5% CAGR over 2y
Location
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Computed from 5 filingsProvides mechanical building services maintenance and specialist works for commercial buildings, including HVAC and plant maintenance, building management system support, compliance assistance, and…
Serves B2B clients responsible for high-profile commercial buildings, including property owners, landlords, facilities managers and project teams in the commercial real estate sector.
Financial Health
StrongStrong · Hiring · 11% CAGR over 4y
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Computed from 3 filingsProvides air conditioning and ventilation services for commercial premises, including system design, installation, repair and planned maintenance. Also advises on environmental compliance for…
Serves B2B commercial clients from small businesses to multinational corporations, particularly in education, healthcare, hotels, leisure, offices, retail, scientific facilities and residential…
Financial Health
StrongStrong · Growing, Hiring · 9% CAGR over 2y
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Computed from 5 filingsProvides design, supply, installation and maintenance of commercial refrigeration, air conditioning and ventilation/extraction systems. Also delivers mechanical building services and project…
Serves NHS trusts, food wholesale market businesses, landlords, tenants, and commercial or industrial property operators across London and the South East.
Financial Health
StrongStrong · Growing, Hiring · 6% CAGR over 4y
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Computed from 3 filingsProvides building services engineering and contracting, including design and installation of heating, ventilation, air conditioning, gas and plumbing systems. Delivers decarbonisation upgrades,…
Serves public sector, healthcare and education organisations, plus commercial, leisure and retail businesses across the UK with building estates requiring mechanical services projects.
Financial Health
StrongStrong · Growing, Hiring · 27% CAGR over 2y
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Computed from 3 filingsProvides installation, maintenance and repair of refrigeration, air conditioning and heat pump systems for domestic, commercial and industrial applications, including water chillers and ammonia or…
Sells to domestic, commercial and industrial customers needing refrigeration and air conditioning support, including businesses in retail, hospitality, gyms and recreational facilities, as well as…
Financial Health
StrongStrong · Growing, Hiring · 24% CAGR over 2y
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Computed from 4 filingsDesigns, installs, refurbishes and maintains mechanical and electrical building services systems, including air conditioning, commercial refrigeration and renewable energy technologies, for…
Serves local authorities and private-sector clients commissioning large-scale building projects, including commercial, industrial and residential developments, housing schemes, education facilities,…
Financial Health
StrongStrong · Growing, Hiring · 38% CAGR over 3y
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Computed from 5 filingsProvides installation, repair and maintenance of air conditioning and HVAC systems for residential, commercial and public sector buildings. Services include ventilation, heating, plumbing and air…
Serves homeowners, offices, retail businesses and commercial fit-out clients, plus public sector organisations including schools, NHS hospitals, police, councils and government buildings across…
Financial Health
HealthyHealthy · -1% CAGR over 4y
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Computed from 3 filingsDesigns, installs and services commercial refrigeration and air conditioning systems. Provides cold rooms, bulk milk tanks, commercial catering equipment, refrigerated trailer hire, and maintenance…
Serves businesses across Devon, Cornwall and Somerset needing commercial refrigeration, air conditioning and catering equipment, including foodservice operators, retailers and dairy/agricultural…
Financial Health
HealthyHealthy · -5% CAGR over 2y
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Computed from 5 filingsProvides mechanical and electrical building services including design, installation and maintenance. Delivers HVAC, chilled water, air conditioning, thermal insulation, lighting, power distribution…
Serves main contractors, developers and property teams in the commercial fit-out market, including office, education and public-sector building projects.
Financial Health
HealthyHealthy · Hiring · 23% CAGR over 4y
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Computed from 3 filingsProvides mechanical, electrical and HVAC engineering services including design, installation, repair and maintenance of air conditioning, heating, gas, plumbing, ducting and ventilation systems for…
Serves B2B commercial and industrial clients across the South of England, including facilities with catering or kitchen ventilation needs, alongside selected domestic and residential customers…
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 2y
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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 5 filingsProvides commercial and industrial mechanical engineering services including design, installation and maintenance of HVAC, heating, chilled water, gas, steam and domestic water systems. Also offers…
Serves procurement and estates managers at hospitals, emergency services, public institutions, industrial sites and commercial enterprises with large-scale or critical building facilities across East…
Financial Health
StrongStrong · Growing, Hiring · 37% CAGR over 4y
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Computed from 3 filingsDesigns, installs, and maintains industrial and commercial refrigeration systems using ammonia, CO2 and other refrigerants. Provides system design, commissioning, preventative maintenance, and 24/7…
Serves UK industrial and heavy commercial organisations, including food processors, chilled distribution firms, pharmaceutical companies, dairies, breweries, petrochemical sites, cold storage…
Financial Health
HealthyHealthy · -89% CAGR over 2y
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Computed from 5 filingsProvides industrial refrigeration engineering including system design, installation, servicing and maintenance, alongside mechanical and electrical engineering services. Works with food production…
Serves industrial businesses, primarily food production and distribution companies, including organisations needing refrigeration, mechanical, steam and electrical engineering support and service…
Financial Health
StrongStrong · Growing, Hiring · 15% CAGR over 4y
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Computed from 3 filingsProvides commercial heating and air conditioning services, including installation, maintenance, servicing and call‑outs. Also undertakes mechanical and electrical works, plumbing, control systems,…
Serves commercial clients and facilities/property managers responsible for premises in London and the South of England, requiring heating, air conditioning and environmental building services.
Financial Health
StrongStrong · Growing · 0% CAGR over 2y
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Financial sub-scores
Computed from 5 filingsDesigns, installs and maintains mechanical and electrical building services, including air‑conditioning, ventilation and heating systems. Provides commercial pipework installation, planned…
Serves large commercial estate owners and facilities teams, including education institutions, healthcare sites, offices and law firms needing mechanical and electrical building services support.
Financial Health
StrongStrong · Growing, Hiring · 21% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsDesigns, installs and maintains heating, ventilation and air conditioning (HVAC) systems for commercial and residential buildings. Provides air conditioning installation, ventilation systems, HVAC…
Serves commercial and residential building owners and tenants, including offices, retail stores, universities, bakeries and industrial facilities, as well as contractors across Scotland and the North…
Financial Health
StrongStrong · Hiring · 9% CAGR over 4y
Location
Unlock all 1,896 leads
Showing 50 of 1,896 — +1,846 more with verified decision-maker contacts, live data, and CRM sync.
Unlock all 1,896 leads
Showing 50 of 1,896 — +1,846 more with verified decision-maker contacts, live data, and CRM sync.
How WordPress 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.
WordPress 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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