HVAC Companies Using All in One SEO in the UK: 111 Active Firms (2026)
HVAC companies running SEO plugin software install, service and maintain heating, ventilation and refrigeration systems across the UK.
For HVAC and refrigeration contractors, an SEO plugin usually sits close to the demand-generation workflow rather than the operational service system. It helps teams manage page titles, service-area pages, technical metadata and indexation without involving a developer for every local search change. Adoption tends to signal a contractor with a public-facing sales motion: commercial landlords, industrial sites and property managers search by location, plant type and emergency cover, so the website has to carry more than a brochure role. The typical buyer is still pragmatic, often a manager-led marketing function attached to a field-service business rather than a standalone digital department.
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Across the UK, 111 HVAC firms are actively trading while running this SEO plugin, with reported headcount of 1,169 employees. Among 1,215 HVAC SEO-plugin detections, this plugin ranks third at 9.1%, behind two more common plugin choices. The regional skew is concentrated in the South East (18.0%), London (14.4%), East of England (11.7%), Scotland (9.0%) and South West (9.0%). That spread fits a contractor market where web visibility is useful for both dense urban service areas and dispersed regional maintenance territories.
Procurement is likely to be low-friction, because the plugin sits inside the website stack rather than inside job management, accounting or asset-maintenance systems. The risk surface is still not trivial for contractors taking commercial enquiries online. Contact forms, analytics tags and anti-spam checks can bring GDPR and ICO obligations into scope, particularly where property managers or industrial customers submit site details, fault descriptions or named contacts. HVAC buyers may also rely on agencies or web freelancers for configuration, which can make ownership of redirects, cookies and technical changes less clear than ownership of field-service software.
Adoption appears likely to remain incremental. HVAC contractors have practical reasons to keep search tooling close to the website: emergency repairs, planned maintenance and replacement work all reward visible service pages and clear enquiry routes. The same pragmatism limits wholesale platform changes; if a plugin is good enough for local rankings, agencies and owner-managers may leave it in place until a redesign, compliance concern or site-speed issue forces review. Consolidation in the website stack may pull some firms towards bundled SEO features, but specialist plugins still suit contractors with location-heavy content and a modest marketing team.
Adoption by company size
Adoption of All in One SEO rises with company size across the trading UK HVAC companies in this cohort. 0.3% of the 23,256 companies with under 10 employees run All in One SEO (79 detected). 2.7% of the 1,144 companies with 10–50 employees run All in One SEO (31 detected). 1.2% of the 83 companies with over 50 employees run All in One SEO (1 detected). That is a 0.9% gap between the over 50 employees and under 10 employees bands.
111
Active firms
2026
9.1%
Of detected SEO share
UK HVAC
6
Median headcount
Filed accounts
227
Verified contacts
Across this cohort
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Key facts
About 4% of the trading cohort reports turnover above £5M (5 of 111 firms) — the rest sits below that revenue band.
9% of the cohort was incorporated since 2022 (10 firms), so a sizeable share is in its first few filing cycles.
The page’s SEO plug-in accounts for 9.1% (111) of detectable SEO systems among UK HVAC firms, behind systems at 80.0% (972) and 9.9% (120).
Every detected HVAC user in this cohort also runs WordPress, making the SEO signal part of a common content-management stack rather than a standalone web-technology pattern.
Half of the cohort also runs reCAPTCHA and Google Analytics, each detected on 50.5% (56) of sites.
The regional skew is broad but southern-weighted: South East 18.0% (20), London 14.4% (16) and East of England 11.7% (13).
Construction appears alongside the HVAC trade tag for 35.1% (39) of the cohort, with Renewable Energy present for 10.8% (12).
SEO market share among UK HVAC
Share of the 1,215 UK HVAC with a detectable system. As of June 2026.
What else do All in One SEO-running HVAC run?
Share of the 111 All in One SEO-running UK companies where each technology was also detected. As of June 2026.
Where All in One SEO 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
£688.9K
Median UK turnover
4.5%
Above £5M turnover
10
Incorporated since 2022
227 verified decision-maker contacts
across these 111 companies, with emails available in Firmbase. Filter by role, seniority and stack.
Top UK HVAC using All in One SEO
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 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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Financial sub-scores
Computed from 3 filingsProvides design, installation, maintenance and repair of air conditioning, refrigeration and ventilation systems. Services include water‑cooled AC, commercial refrigeration, cold rooms, duct…
Serves commercial and residential clients in London, including restaurants, bars, hotels, pubs and clubs, office buildings, schools, universities, homeowners and apartment owners.
Financial Health
StrongStrong · Growing, Hiring · 12% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsDesigns, supplies, installs and maintains refrigeration, air conditioning and heat pump systems. Provides project management, commissioning and ongoing servicing for commercial, industrial and…
Serves businesses, public-sector and domestic customers across East Anglia, including offices, retail, schools, healthcare sites, gyms, churches, hospitality venues, data centres, factories,…
Financial Health
StableStable · 1% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsInstalls, repairs and maintains commercial and industrial refrigeration and air conditioning systems. Provides cold room and freezer room installation and servicing, along with emergency call‑out and…
Serves commercial and industrial organisations in Newcastle upon Tyne and the North East, including businesses needing air conditioning, refrigeration, cold room or freezer room support.
Financial Health
WeakWeak · Hiring · 26% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides design, supply, installation and maintenance of refrigeration and air conditioning systems for commercial and industrial premises. Supplies refrigerated display cabinets, LED lighting,…
Serves B2B customers in industrial and retail sectors, including convenience store operators, supermarkets and businesses with refrigerated or air-conditioned premises.
Financial Health
StableStable · Hiring · 3% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsSupplies, installs and maintains commercial refrigeration and air conditioning systems. Products include catering and bar refrigeration, medical refrigeration cabinets, and dairy milk cooling…
Serves catering and leisure businesses such as shops, bars, pubs, clubs and restaurants, plus NHS and healthcare organisations and dairy farms across Lancashire and the North West.
Financial Health
WeakWeak · 2% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides design, installation, servicing and maintenance of commercial refrigeration and air conditioning systems. Supplies equipment including display cabinets, walk‑in freezers, chillers and cold…
Serves UK businesses and public-sector sites, including convenience retail symbol groups, restaurants, hospitals and other commercial premises.
Financial Health
WeakWeak · -3% CAGR over 4y
Location
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Financial sub-scores
Computed from 2 filingsProvides air conditioning and precision cooling systems for commercial and industrial facilities, including consultancy, system installation, servicing and maintenance, chiller refurbishment and…
Serves B2B and public sector customers with critical temperature-control needs, including food and drink, pharmaceutical, chemical, hospital, government building and data centre operators.
Financial Health
StrongStrong · Hiring · 133% CAGR over 1y
Location
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Financial sub-scores
Computed from 5 filingsProvides commercial heating, air conditioning and refrigeration services including installation, maintenance and repair. Also delivers boiler and plumbing servicing, BMS controls, water treatment,…
Serves commercial and industrial organisations across the UK, particularly facilities teams responsible for building heating, cooling, hot water, air conditioning and compliance needs.
Financial Health
StrongStrong
Location
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Financial sub-scores
Computed from 5 filingsDesigns, supplies, installs and repairs commercial refrigeration equipment for hospitality and retail businesses. Services include chilled and frozen display units, cold rooms, chilled storage, ice…
Serves commercial customers within 40 miles of Leicester, including bars, clubs, restaurants, cafés and food retailers needing refrigeration, chilled display, freezer, cold room, ice machine and air…
Financial Health
StableStable · 0% CAGR over 4y
Location
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Financial sub-scores
Computed from 2 filingsProvides refrigeration and air conditioning services including installation, maintenance, and repair for commercial and domestic systems. Also delivers mechanical services such as chilled water…
Serves commercial and industrial businesses, facilities teams, and homeowners in Cambridgeshire and East Anglia needing refrigeration, air conditioning, and mechanical support.
Financial Health
StrongStrong · Growing, Hiring · 50% CAGR over 1y
Location
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Financial sub-scores
Computed from 3 filingsProvides installation, maintenance and repair of air conditioning, refrigeration and heating systems for commercial clients. Also supplies commercial refrigeration cabinets and services heat pumps,…
Serves businesses across the UK and beyond, including premises operators, retailers, hospitality and foodservice organisations, and other commercial clients with heating, cooling, refrigeration and…
Financial Health
StableStable · Hiring · 6% CAGR over 2y
Location
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Financial sub-scores
Computed from 4 filingsProvides facilities management and engineering services including installation, maintenance and repair of air conditioning, refrigeration, ventilation, electrical and plumbing systems, along with…
Serves businesses and organisations in industry, commerce, retail, education and hospitality, including facilities managers, schools, manufacturers, catering operators and leisure venues, mainly in…
Financial Health
WeakWeak · 0% CAGR over 3y
Location
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Financial sub-scores
Computed from 4 filingsDesigns, installs and maintains air conditioning and refrigeration systems for commercial and residential buildings. Services include air source heat pumps, air handling units, computer room cooling,…
Serves both businesses and homeowners, including offices, hotels, computer rooms and other commercial properties, mainly across the Midlands, London and surrounding areas.
Financial Health
HealthyHealthy · -31% CAGR over 3y
Location
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Financial sub-scores
Computed from 3 filingsProvides air conditioning system design, supply and installation for residential, commercial and retail properties. Offers maintenance, servicing and repair, as well as portable air conditioning hire…
Serves businesses, contractors, developers, landlords, homeowners, retailers, rural communities and health service providers in Leicester and the Midlands needing air conditioning solutions.
Financial Health
StableStable · 0% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides commercial heating and HVAC engineering services, including boiler servicing, maintenance and repair, system design and installation, pipework fabrication, pumps and BMS controls, air…
Serves B2B and public sector organisations needing commercial heating and HVAC support, including schools and higher education, healthcare, heritage sites, industrial and manufacturing businesses,…
Financial Health
WeakWeak · -69% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsProvides design, installation and maintenance of commercial building engineering systems, including heating, lighting, ventilation, air conditioning, refrigeration, fire systems, and water and air…
Sells to commercial property owners, operators and facilities teams needing building engineering support, serving businesses with both large national contracts and smaller commercial projects.
Financial Health
WeakWeak · Hiring · 8% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides air conditioning installation, maintenance and repair services for commercial premises including offices, schools, factories and retail sites. Conducts site surveys, replaces R22 refrigerant…
Serves businesses and public-sector sites needing air conditioning support, including schools, offices, factories and retail shops in Glasgow and nationwide.
Financial Health
StrongStrong · Hiring · 11% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides heating, ventilation and air conditioning (HVAC) services including installation, maintenance and repair of air conditioning systems, heat pumps and ventilation equipment. Also installs…
Serves residential, commercial and industrial customers nationwide, including homeowners, property developers, apartment schemes, offices and commercial premises needing climate control and…
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsProvides supply, installation, servicing and repair of air conditioning and refrigeration systems, including cold rooms, cellar coolers, chillers, bottle fridges and ice machines. Also supplies…
Serves domestic, commercial and industrial customers across the Midlands and London, including offices, restaurants, catering firms, supermarkets, newsagents, pubs, brewery chains and home users…
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsInstalls, services and maintains air conditioning, heating and ventilation systems for residential and commercial buildings. Provides HVAC system design, supply and installation, including split…
Serves homeowners, offices, commercial and industrial premises, server rooms, hospitals, clinics and new-build developers needing air conditioning, heating or ventilation systems across London,…
Financial Health
StableStable · 0% CAGR over 4y
Location
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Financial sub-scores
Computed from 4 filingsProvides mechanical and electrical engineering services for commercial and domestic buildings, including installation and maintenance of HVAC, air conditioning, refrigeration, ventilation, pipework…
Serves businesses, public-sector and education estates, and homeowners across London and the Home Counties, including commercial property, heritage sites, data centres, hospitality, rail and…
Financial Health
StrongStrong · Hiring · 91% CAGR over 3y
Location
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Financial sub-scores
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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Financial sub-scores
Computed from 5 filingsProvides HVAC services focused on air-handling units, including refurbishment, manufacturing, installation, coil repair and replacement, and control upgrades. Conducts ventilation surveys,…
Serves B2B customers managing commercial and industrial buildings, including facilities teams, mechanical contractors and property operators needing air-handling, ventilation, boiler and pipework…
Financial Health
HealthyHealthy
Location
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Financial sub-scores
Computed from 5 filingsSupplies and installs commercial refrigeration and air conditioning systems, providing equipment sales, planned maintenance, servicing and repair. Also retails commercial refrigeration units,…
Serves B2B customers with commercial premises, especially hospitality, catering and retail operators, plus UK buyers of commercial refrigeration, catering equipment and sundries via online and…
Financial Health
HealthyHealthy · -4% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsDesigns, installs and maintains air conditioning and ventilation systems for commercial, industrial and domestic properties. Provides system design, site surveys and project management, installing…
Serves businesses, contractors, public sector bodies and homeowners across North West England, including healthcare practices, retailers, offices, industrial sites, builders, M&E contractors,…
Financial Health
StrongStrong · Hiring · 19% CAGR over 4y
Location
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Financial sub-scores
Computed from 4 filingsProvides commercial and industrial plumbing and heating services, including installation and maintenance of boiler houses, ventilation and mechanical control systems, air conditioning, and waste…
Serves commercial and industrial property owners, facilities managers and public-sector sites such as schools and hospitals, as well as offices and warehouses.
Financial Health
StrongStrong · Growing, Hiring · 10% CAGR over 3y
Location
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Financial sub-scores
Computed from 5 filingsProvides installation, repair and maintenance of refrigeration equipment and cold rooms for commercial and residential customers. Services include cold room construction, air conditioning…
Serves homeowners and commercial or industrial premises in Birmingham and the West Midlands, including businesses with temperature-controlled goods and sites using refrigeration, cold rooms or…
Financial Health
HealthyHealthy · Hiring · 32% CAGR over 5y
Location
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Financial sub-scores
Computed from 5 filingsProvides design, installation, maintenance and repair of air conditioning and refrigeration systems. Offers customised HVAC system design, preventative maintenance plans, emergency repairs and energy…
Serves residential and commercial customers needing air conditioning and refrigeration support, including property owners or managers seeking installation, maintenance, repairs and efficiency…
Financial Health
HealthyHealthy · -10% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsProvides surveys, installation, maintenance, cleaning and remedial works for air handling units and mechanical ventilation ductwork. Conducts fire damper inspections, testing and installations,…
Serves businesses and facilities managers responsible for commercial buildings with AHUs, mechanical ventilation, fire dampers and kitchen extract systems, including sites needing compliance-led…
Financial Health
StrongStrong · -5% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides commercial building services including installation, maintenance and repair of air conditioning and heating systems, electrical testing and installations, and water system monitoring,…
Serves commercial organisations and facilities managers across the south of the UK needing building services support for air conditioning, heating, electrical, water systems and facilities management.
Financial Health
HealthyHealthy · -42% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides mechanical and electrical engineering services including installation and maintenance of commercial gas and heating systems, hot water supply, HVAC, and electrical building services.…
Serves mainly B2B property and facilities customers, including estates and facilities managers responsible for HMOs, mixed-use buildings, offices and retail premises, plus schools and some private…
Financial Health
HealthyHealthy · Hiring · 65% CAGR over 4y
Location
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Financial sub-scores
Computed from 5 filingsProvides mechanical and electrical building services including air conditioning installation and maintenance, gas and heating system servicing, electrical installation, and planned preventative…
Serves B2B building managers and facilities teams across sectors in the South East and Greater London, particularly organisations responsible for commercial building systems and maintenance.
Financial Health
StableStable · -7% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsSupplies new and reconditioned commercial catering and refrigeration equipment, and provides installation, planned maintenance, reactive repairs, housekeeping services, and ventilation and extraction…
Serves businesses operating commercial kitchens, including hospitality, catering, foodservice and facilities operators needing catering, refrigeration, ventilation and extraction equipment support in…
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides HVAC and building services engineering for commercial and industrial projects, including installation and servicing of heating, ventilation and air conditioning systems, and delivery of…
Serves main contractors and public sector organisations involved in industrial and commercial building projects on the South Coast of England.
Financial Health
StableStable · -10% CAGR over 4y
Location
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Financial sub-scores
Computed from 3 filingsDesigns, manufactures and installs HVAC, air conditioning, ducted ventilation and kitchen extraction systems for commercial and residential buildings. Provides system design, site surveys,…
Serves B2B customers such as factories, commercial kitchens, housing providers and care/older people services, plus residential homeowners seeking air conditioning for individual properties and…
Financial Health
StableStable · -13% CAGR over 2y
Location
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Computed from 3 filingsDesigns, manufactures and supplies industrial water cooling equipment including refrigerated water chillers, dry air coolers and oil coolers. Also provides bespoke cooling systems, spare parts,…
Serves businesses and public-sector organisations needing process cooling, including factories, manufacturers, food and beverage plants, laboratories, hospitals, universities, MoD sites, farms,…
Financial Health
HealthyHealthy · 0% CAGR over 2y
Location
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Computed from 4 filingsSupplies, installs, repairs and maintains commercial catering and refrigeration equipment. Provides ovens, fryers, hobs, bakery equipment and spare parts, along with servicing, maintenance packages…
Targets B2B and public-sector catering operations, including hotels, restaurants, care homes, schools, bakeries and other local commercial kitchen operators.
Financial Health
StableStable · Hiring · 7% CAGR over 3y
Location
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Financial sub-scores
Computed from 3 filingsProvides inspection, cleaning and maintenance of HVAC and ventilation systems, including ductwork cleaning, ventilation hygiene surveys, LEV testing, air conditioning servicing, fire damper testing,…
Serves UK public and private sector estates teams, including hospitals and health trusts, factories, retailers, schools, commercial landlords, offices and food-service premises.
Financial Health
WeakWeak · 2% CAGR over 2y
Location
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Financial sub-scores
Computed from 5 filingsProvides mechanical engineering services for commercial and industrial buildings, including design and build of mechanical systems, commercial gas installation and maintenance, HVAC installation, and…
Serves B2B customers in commercial and industrial sectors, including facilities managers, property owners, contractors, and project teams responsible for mechanical building services, gas systems,…
Financial Health
WeakWeak · 0% CAGR over 4y
Location
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Computed from 3 filingsDesigns, supplies and installs air conditioning and ventilation systems for commercial and residential buildings. Provides climate control solutions including system design, installation and…
Serves commercial and residential customers, including offices, retailers, shopping centres, gyms, leisure facilities, warehouses, factories and homeowners, mainly in London, the South East and…
Financial Health
DistressedDistressed · 0% CAGR over 2y
Location
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Computed from 5 filingsProvides installation and mechanical building services for heating, ventilation and air conditioning (HVAC) systems. Works on commercial, industrial and large residential projects, including offices,…
Serves commercial, industrial and large-scale residential clients, including offices, hotels, restaurants, schools, nightclubs, retail units, distribution centres, factories, student accommodation…
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 4y
Location
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Computed from 3 filingsProvides design, installation, commissioning and maintenance of heating, air conditioning, ventilation and electrical systems. Also installs renewable energy technologies including solar panels and…
Serves commercial, industrial and domestic customers, including public-sector leisure centres, hotels, nightclubs, bars, restaurants, large retailers, office blocks, football stadiums and other…
Financial Health
StableStable · Hiring · 32% CAGR over 2y
Location
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Computed from 5 filingsInstalls and maintains air conditioning, ventilation, and heat pump systems for residential and commercial buildings. Services include MVHR (mechanical ventilation with heat recovery) systems, air…
Serves residential and commercial customers, including homeowners, landlords with rental properties and businesses needing air conditioning, ventilation and heat pump installation or maintenance.
Financial Health
StrongStrong · 100% CAGR over 3y
Location
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Computed from 5 filingsProvides mechanical and electrical engineering services including HVAC system design and installation, electrical installations, and building control systems. Delivers M&E projects, service…
Serves B2B and public-sector facilities teams, property managers, contractors and commercial occupiers in hotels, offices, media sites, airports, education and leisure across London, the South, East…
Financial Health
StableStable · Hiring · 5% CAGR over 4y
Location
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Computed from 3 filingsProvides facilities maintenance and building services engineering, including mechanical and electrical installations, HVAC, plumbing, air conditioning and refrigeration, electrical testing, and…
Serves commercial property owners, facilities managers and organisations in leisure, financial services, healthcare, retail and industrial sectors that manage building sites or estates.
Financial Health
StableStable · -15% CAGR over 2y
Location
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Financial sub-scores
Computed from 4 filingsSupplies, installs and maintains air conditioning systems for commercial and residential properties. Provides system design, installation, repairs, preventative servicing and emergency call-outs,…
Serves both B2B and B2C customers: commercial premises, small businesses, homeowners and apartment residents across Kent and nearby London areas.
Financial Health
StrongStrong · Growing, Hiring · 14% CAGR over 3y
Location
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Computed from 5 filingsProvides design, installation, maintenance and repair of air conditioning and ventilation systems for domestic and commercial properties, including system servicing, emergency call-outs and ongoing…
Serves homeowners and commercial clients needing air conditioning and ventilation support, from small repair jobs to larger installation projects, with customers in Sheffield and across the UK.
Financial Health
StrongStrong · Hiring · 32% CAGR over 4y
Location
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Computed from 5 filingsProvides air conditioning and HVAC services including system installation, maintenance and repairs. Also offers air quality testing and monitoring, thermal imaging, energy assessments, and predictive…
Serves homeowners and businesses, including offices, computer rooms and commercial premises across Surrey, Berkshire and Hampshire.
Financial Health
WeakWeak · 0% CAGR over 4y
Location
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Computed from 5 filingsSupplies commercial catering and refrigeration equipment and provides kitchen design, project management, installation, and maintenance services. Also offers cold room storage hire, maintenance…
Serves commercial catering and refrigeration buyers in the South West, including hospitality operators, education providers, activity centres, butchers and other foodservice businesses.
Financial Health
StableStable · 1% CAGR over 4y
Location
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How All in One SEO 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.
All in One SEO is a trademark of its respective owner. Firmbase is not affiliated with, sponsored by, or endorsed by the trademark owner.
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