Turn this list into pipeline.
HVAC Companies in the UK: 24,000+ Active Firms (2026)
HVAC companies in the UK install, maintain and supply heating, ventilation, air-conditioning and refrigeration systems for buildings.
Buying centres sit across facilities management, estates teams, mechanical contractors, cold-chain operators and residential property managers. Sales tend to blend technical specification, site survey, installation scheduling and recurring service agreements rather than pure product supply. Commercial and industrial buyers usually value emergency response coverage, planned maintenance and evidence of competent field engineering, while residential-facing work is more local and route-density driven. Engagements range from one-off replacement projects to multi-site maintenance contracts, with procurement shaped by downtime risk, energy performance and the need to keep occupied buildings usable.
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Around 24,758 HVAC firms are actively trading in the UK, giving the market a long tail of local installers alongside mid-market mechanical services contractors. The measured employment footprint is 4,540 reported staff, which points to a sector where field engineering capacity is visible but not evenly distributed across the full company base. Buyers typically encounter a fragmented supply market: specialist refrigeration engineers, ventilation installers, heating contractors and broader facilities-maintenance providers may all compete for adjacent work, especially where service contracts bundle planned maintenance with emergency response.
Compliance pressure is embedded in the service model rather than sitting at the edge of it. Refrigeration work brings refrigerant-control and leakage-management obligations; heating and ventilation jobs bring building-safety, electrical and commissioning requirements; maintenance contracts create audit trails around response times, asset condition and remedial work. For commercial and industrial customers, supplier selection often turns on certification, insurance, call-out coverage and the ability to document work across occupied sites. That makes compliance administration part of delivery cost, not merely a sales credential.
Recent incorporations suggest continuing entry at the smaller end, but the revenue-scaled layer appears relatively narrow. The sector therefore looks likely to remain fragmented, with consolidation tending to happen around service density, specialist refrigeration capability and recurring maintenance portfolios rather than pure installation volume. Demand appears tied to the less glamorous mechanics of estate upkeep: ageing plant, energy-cost scrutiny, tenant comfort and cold-chain reliability. Operators with reliable field utilisation and defensible service territories should be better placed than firms dependent on irregular project work.
24,758
Active firms
2026
403
£5M+ companies
Revenue above £5M
6,082
Recent incorporations
Incorporated since 2022
Key facts
About 1% of the trading cohort reports turnover above £5M (403 of 24,758 firms) — the rest sits below that revenue band.
24% of the cohort was incorporated since 2022 (6,082 firms), so a sizeable share is in its first few filing cycles.
HVAC firms usually sit across installation projects, planned servicing and equipment supply, rather than a single trade line.
Recurring maintenance contracts and one-off installation work should be compared separately because they produce different revenue profiles.
Refrigeration and air-conditioning specialists sit alongside general building-services contractors, so buyer comparisons need a clear service-line filter.
Demand is tied to keeping buildings heated, cooled, ventilated and temperature-controlled.
Top UK HVAC companies
COOL-THERM (UK) LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsSupplies, designs and installs refrigeration and climate control systems including chillers, heat pumps and commercial air conditioning. Provides bespoke HVAC solutions, consultancy, F‑Gas compliance…
Serves commercial and industrial customers across the UK, including facilities managers and estates teams in data centres, hospitals, universities, hotels, pharmaceutical manufacturing, financial…
Financial Health
StableStable · -3% CAGR over 4y
Location
AIRCO REFRIGERATION AND AIRCONDITIONING LIMITED
Trajectory
5y · 2021–NowFinancial 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
SEWARD REFRIGERATION EA LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
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
Location
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and maintains HVAC and mechanical building services systems, including air conditioning, heating, ventilation, refrigeration and control systems. Also provides electrical…
Serves B2B and public-sector customers, including end users, main contractors, councils and major businesses, with emphasis on organisations in the South East.
Financial Health
StableStable · -65% CAGR over 4y
Location
J FLETCHER (ENGINEERS) LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
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
SEWARD REFRIGERATION LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs, services and maintains industrial and commercial refrigeration systems. Works with refrigerants such as ammonia, CO2 and HFCs, providing plant design, commissioning, maintenance…
Serves UK businesses operating large industrial and heavy commercial refrigeration plants, especially food processors, chilled distributors, pharmaceutical manufacturers, ice cream and dairy…
Financial Health
StableStable · -68% CAGR over 4y
Location
DCI REFRIGERATION & ELECTRICAL LIMITED
Trajectory
5y · 2019–NowFinancial sub-scores
Computed from 5 filingsProvides facilities management and engineering services focused on refrigeration and HVAC systems. Designs, installs and maintains air conditioning, ventilation, electrical, plumbing and heating…
Serves UK businesses and public-sector estates, including supermarkets, convenience stores, cold storage distributors, retailers, offices, childcare premises, student accommodation, educational…
Financial Health
HealthyHealthy · Growing, Hiring · 2% CAGR over 5y
Location
SURE ENERGY SOLUTIONS LTD
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and commissions industrial refrigeration systems, specialising in ammonia and CO₂ technologies. Provides servicing, maintenance programmes, technical support, and direct sales of…
Serves B2B industrial operators across the UK and Ireland, including food manufacturers and other facilities with large-scale refrigeration plants, targeting engineering, operations and maintenance…
Financial Health
HealthyHealthy · Hiring · 16% CAGR over 4y
Location
Climatix Group Limited
Trajectory
3y · 2023–NowFinancial 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
INDUSTRIAL REFRIGERATION SERVICES LIMITED
Trajectory
3y · 2023–NowFinancial 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
EJM ENGINEERED SYSTEMS LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides design, installation and maintenance of industrial and commercial refrigeration systems, including ammonia-based plant, along with air conditioning and ventilation systems. Delivers…
Serves UK businesses in the food industry and non-food production sectors, including commercial property owners, office buildings and production facilities needing refrigeration, air conditioning,…
Financial Health
WeakWeak · -67% CAGR over 4y
Location
Aircon-Refrigeration Limited
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides design, installation, repair and maintenance of commercial air conditioning, refrigeration, heating and ventilation systems. Also offers equipment modernisation, 24‑hour servicing and…
Serves B2B customers operating commercial and industrial premises, including retailers, foodservice operators and organisations with cold storage, HVAC or refrigerated display requirements.
Financial Health
WeakWeak · -6% CAGR over 3y
Location
EUROPE AIR CONDITIONING LTD
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, supplies, installs and maintains air conditioning, heating and ventilation systems for commercial and industrial buildings. Provides planned preventative maintenance, technical…
Serves small private businesses through to large multinationals across the UK, primarily in retail, commercial, industrial, leisure, catering and healthcare sectors.
Financial Health
StrongStrong · Growing, Hiring · 17% CAGR over 4y
Location
Turn Key Air Conditioning Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and maintains air conditioning, ventilation and HVAC systems for commercial and industrial premises. Provides system servicing, repair, and mechanical building services including…
Serves commercial and industrial businesses across the UK, including manufacturing, healthcare, hospitality and retail organisations, typically facilities or operations teams responsible for…
Financial Health
StableStable · Hiring · 3% CAGR over 4y
Location
Aura (UK) Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides design, supply and installation of air conditioning and HVAC systems, including refrigerant systems, heat pumps, ventilation and air purification. Also delivers surveys, specification,…
Serves UK-wide commercial clients and contractors, including fit-out contractors, facilities management teams, healthcare providers, offices, hospitality and leisure venues, education organisations,…
Financial Health
StableStable · Hiring · 20% CAGR over 4y
Location
Galxc Cooling Services Limited
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsProvides industrial and HVAC cooling solutions, including chillers, chilled water systems and temperature control equipment. Services include system design, supply, installation, commissioning,…
Serves UK businesses needing cooling infrastructure, including HVAC/building services contractors, refrigeration clients, industrial process operators, breweries, laboratories, data centres and…
Financial Health
DistressedDistressed · -16% CAGR over 1y
Location
Pentagon Refrigeration & Air Conditioning Limited
Trajectory
5y · 2021–NowFinancial sub-scores
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
K4 Service Ltd
Trajectory
5y · 2022–NowFinancial 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
Newsome Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsSupplies and hires temperature and humidity control equipment for industrial and commercial use, including chillers, boilers, dehumidifiers, air handling units, heaters, and heat pumps. Provides…
Serves industrial and commercial organisations in building services, drinks and beverage, chemical and pharmaceutical, food processing, leisure, medical/scientific, metalworks, plastics/rubber and…
Financial Health
StrongStrong · Growing, Hiring · 37% CAGR over 4y
Location
NATIONWIDE AIR CONDITIONING LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides installation, maintenance and repair of air conditioning and HVAC systems for commercial clients. Delivers building services projects, energy management support, and lifecycle management of…
Serves blue-chip business clients with large, multi-site estates across the UK, including organisations seeking service, project and energy support for building assets.
Financial Health
HealthyHealthy · Hiring · 14% CAGR over 4y
Location
Integrated MEP Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and maintains HVAC, air conditioning, heating, ventilation and fire protection systems. Provides mechanical and electrical engineering services including sprinkler systems,…
Serves B2B and public-sector building operators, facilities teams and project buyers in commercial and industrial settings, especially hotels, retail, academia, healthcare and public buildings across…
Financial Health
StrongStrong · Growing · 0% CAGR over 4y
Location
Penmann Climatic Systems Ltd
Trajectory
2y · 2023–NowFinancial sub-scores
Computed from 2 filingsProvides design, supply, installation, hire and maintenance of industrial cooling, air conditioning, ventilation and humidity control systems. Supplies equipment including chillers, boilers,…
Sells B2B to UK food manufacturers and processors, especially dairy, confectionery, bakery, snacks, pet food, ready meals, cheese and meat producers. Also serves industrial and commercial sites such…
Financial Health
HealthyHealthy · 5% CAGR over 1y
Location
Machenair Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns, manufactures, installs, and maintains HVAC and mechanical building services systems. Provides air conditioning, ventilation, heating, plumbing, pipe fitting, and compressed air systems,…
Serves blue-chip businesses, end users, contractors and public-sector education estates across the UK and internationally, with sector references including oil and gas, colleges, academies and…
Financial Health
WeakWeak · -27% CAGR over 2y
Location
HLR BUILDING SERVICES LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides HVAC services including design using CAD/BIM, procurement and project management, installation, commissioning, maintenance and repair of air conditioning, ventilation and heating systems,…
Serves B2B clients in the hotel, restaurant and retail sectors, including national chains ranging from budget operators to five-star properties across the UK.
Financial Health
StableStable · 0% CAGR over 2y
Location
Southern Maintenance Solutions (UK) Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides installation, servicing and repair of commercial HVAC systems including heating, air conditioning and ventilation. Also delivers plumbing, drainage, water hygiene and treatment services,…
Serves commercial and public-sector facilities across the South of England, including schools, healthcare providers, hospitality venues, defence sites, retail, industrial and office premises.
Financial Health
HealthyHealthy · Hiring · 11% CAGR over 4y
Location
Joe Storey & Associates Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs, repairs and maintains chillers, heat pumps and HVAC systems for industrial and commercial facilities. Provides retrofit projects, monitoring systems, spare parts supply, and…
Serves B2B and public-sector buyers responsible for industrial and commercial buildings, including councils, healthcare organisations, charities, government bodies, non-profits and private…
Financial Health
WeakWeak · -1% CAGR over 4y
Location
C.S.S. ENVIRONMENTAL LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides commercial refrigeration and air conditioning installation, repair and maintenance. Also delivers HVAC, electrical, gas, plumbing and renewable energy services, including system design,…
Serves businesses and public sector organisations across London and South East England, including hospitality venues, schools, care homes, catering firms, housing developers, offices and hotels from…
Financial Health
WeakWeak · 1% CAGR over 4y
Location
A & N Shilliday & Co. Limited
Trajectory
3y · 2023–NowFinancial sub-scores
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
UK South Services Limited
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides installation, maintenance and servicing of commercial heating, hot water and cooling systems, including boilers, air conditioning, refrigeration and heat pumps. Also offers BMS controls,…
Serves commercial and industrial organisations across the UK, particularly facilities and property teams responsible for heating, hot water, cooling and building compliance.
Financial Health
StableStable · 0% CAGR over 4y
Location
CROWTHER & SHAW LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsDesigns, installs and maintains commercial refrigeration, air conditioning and mechanical ventilation systems. Provides engineering services, servicing and maintenance for facilities including food…
Serves businesses and public-sector organisations nationwide, including food and drink manufacturers, construction sites, schools, hospitals and power stations.
Financial Health
StableStable · -66% CAGR over 4y
Location
Technical Asset Management Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsInstalls and maintains commercial heating, ventilation and air conditioning systems and gas boilers. Provides electrical safety testing, emergency lighting, EV charger installation, energy efficiency…
Serves commercial property owners and facilities managers, especially hotels, retail outlets, care homes and sports facilities, with nationwide multi-site coverage.
Financial Health
StableStable · -67% CAGR over 4y
Location
RYAN - JAYBERG LIMITED
Trajectory
2y · 2024–NowFinancial sub-scores
Computed from 2 filingsDesigns, supplies, installs, and maintains commercial refrigeration, cold storage, and heat pump systems. Provides refrigerated retail display equipment, technical support, and engineering design…
Serves B2B customers in food retail, cold chain, commercial and industrial sectors, including retailers needing display refrigeration, coldstores and environmental control systems, plus clients…
Financial Health
WeakWeak · 1% CAGR over 1y
Location
GRADWOOD LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
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
TEMPERATURE CONTROL LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
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
CLOVER TECHNICAL SERVICES LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
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
Emtec Climate Solutions Limited
Trajectory
5y · 2020–NowFinancial sub-scores
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
Regale Refrigeration and Air Conditioning Limited
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsInstalls, repairs and maintains commercial refrigeration and air conditioning systems, including cold rooms. Provides system design, planned preventative maintenance, emergency repairs, and energy…
Serves UK businesses and public-facing organisations needing commercial temperature control, including retail and wholesale distributors, hospitality venues, manufacturers, healthcare providers,…
Financial Health
StableStable · 2% CAGR over 4y
Location
Sovereign Refrigeration Limited
Trajectory
2y · 2023–NowFinancial 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
RS AIR CONDITIONING LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides installation, maintenance and repair of refrigeration, air conditioning and ventilation systems. Offers service contracts, control systems integration and general contracting for commercial…
Sells to businesses and institutions across sectors including industrial firms, public and private institutions, laboratories, telecommunications companies, food businesses and arenas. Targets larger…
Financial Health
StrongStrong
Location
TECHNICAL RETAIL SERVICES LTD
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides refrigeration, electrical and mechanical building services for commercial and industrial clients, including system design, supply, installation, commissioning and maintenance. Also delivers…
Serves businesses throughout the UK, primarily commercial and industrial organisations across multiple markets requiring refrigeration, electrical and mechanical building services.
Financial Health
StableStable · -90% CAGR over 2y
Location
ACVR SERVICES LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsProvides mechanical services contracting including design, installation and maintenance of HVAC systems such as air conditioning, ventilation, ductwork and chillers. Also delivers specialist…
Serves commercial organisations, especially healthcare and medical imaging estates teams, hospitals, clinics and MRI scanner manufacturers, as well as facilities managers needing specialist support…
Financial Health
StrongStrong · Growing, Hiring · 35% CAGR over 2y
Location
EPPH LIMITED
Trajectory
5y · 2020–NowFinancial sub-scores
Computed from 5 filingsProvides mechanical and electrical building services including HVAC design and installation, plumbing, drainage, and electrical systems. Delivers planned preventive maintenance, facilities…
Serves B2B and public-sector estates teams across the UK, including commercial property managers, developers, education providers, hospitals and veterinary practices.
Financial Health
StableStable · -49% CAGR over 5y
Location
STULZ U.K. LIMITED
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 filingsDesigns and manufactures precision air conditioning units, air handling units and chillers for data centres, telecom infrastructure and other technical environments. Also provides cooling system…
Serves businesses and infrastructure operators with mission-critical facilities, including data centre owners, enterprise IT teams, colocation/cloud providers, telecom networks, control rooms and…
Financial Health
HealthyHealthy · Profitable · 2% CAGR over 2y
Location
G & O Refrigeration Ltd
Trajectory
3y · 2023–NowFinancial sub-scores
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
Location
CLOVER TECHNICAL GROUP LIMITED
Trajectory
4y · 2022–NowFinancial sub-scores
Computed from 4 filingsProvides refrigeration and HVAC services, facilities management, and communications room solutions for commercial and industrial facilities. Also supplies related spare parts and technical support,…
Serves businesses across the UK with plant, facility, refrigeration, HVAC and comms room requirements, including organisations seeking tailored technical service packages.
Financial Health
HealthyHealthy · Hiring · 8% CAGR over 3y
Location
Chillflow Solutions Limited
Trajectory
3y · 2023–NowFinancial sub-scores
Computed from 3 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 · 3% CAGR over 2y
Location
Century Engineering And Refrigeration Installations Limited
Trajectory
3y · 2022–NowFinancial sub-scores
Computed from 3 filingsDesigns, supplies, installs and maintains commercial air conditioning, refrigeration, ventilation and heating systems. Provides HVAC services including system installation, servicing, repairs, and…
Serves commercial and industrial organisations, including restaurants, colleges, care homes, hospitals, schools and hotels, with a focus on businesses needing building climate, refrigeration and…
Financial Health
StrongStrong · Hiring · 24% CAGR over 2y
Location
KEY INTEGRATED SERVICES LIMITED
Trajectory
5y · 2021–NowFinancial sub-scores
Computed from 5 filingsProvides mechanical and electrical engineering design, installation and maintenance services. Offers HVAC systems, electrical engineering, mechanical services, planned and reactive maintenance, and…
Serves UK businesses in commercial, industrial, food and drink production, FMCG manufacturing, pharmaceutical R&D and healthcare sectors, typically facilities, engineering and operations teams…
Financial Health
StableStable · -5% CAGR over 4y
Location
Allweather Refrigeration Limited
Trajectory
4y · 2021–NowFinancial sub-scores
Computed from 4 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 · 9% CAGR over 3y
Location
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How UK HVAC companies work and how to sell to them
What they do
HVAC companies usually earn revenue from a blend of equipment supply, installation, commissioning, servicing and repair. Equipment sales are rarely isolated: the margin sits across specification, labour, parts, maintenance and emergency response. Pricing is typically a mix of fixed-price installation projects, labour day rates, call-out fees, parts mark-ups and recurring planned-maintenance contracts charged per site, asset group or service interval. Refrigeration and air-conditioning specialists may also charge for leak checks, refrigerant handling and asset logs, while heating and ventilation contractors often package inspections, remedial works and seasonal servicing. Cash flow can be uneven because project deposits, supplier credit, engineer time and customer payment terms sit close together.
Who they sell to
Most sell into estates and facilities teams, mechanical contractors, commercial landlords, cold-chain operators, residential property managers and facilities-management buyers. The decision group typically includes a facilities manager or estates lead, with procurement and finance involved where the work affects multiple sites, service-level commitments or capital budgets. Residential and smaller commercial jobs can close after a survey and quotation, while larger commercial or industrial work often moves through approved-contractor lists, tenders, framework agreements or RFPs. Technical credibility matters because buyers are not only purchasing kit; they are buying confidence that occupied buildings, plant rooms and temperature-controlled assets will keep working.
What they buy
HVAC operators tend to spend around the constraint of field delivery: scheduling, route planning, job costing, mobile workforce management, customer relationship management, quoting, invoicing and service-contract administration. Firms with commercial maintenance portfolios often need asset registers, compliance documentation, stock control, fleet management, remote monitoring, health and safety workflows and engineer training systems. Finance, payroll, insurance, recruitment, legal support and outsourced bookkeeping are common services around the core operation. Marketing spend is usually practical rather than brand-led: local search, tender support, website maintenance, review management and lead handling for reactive repair work. Larger contractors may also buy reporting and analytics to track utilisation, first-time fix rates and contract margins.
Why and how to sell to them
Pain usually sits where engineer availability, response times and paperwork meet customer downtime. HVAC buyers tend to evaluate vendors when they win a multi-site maintenance contract, open a new service territory, add field engineers, move from installation-led work into recurring maintenance, or need cleaner audit trails for regulated refrigeration and building-services work. Other triggers include seasonal demand peaks, missed visits, repeat call-outs, parts stockouts and slow invoicing after completed jobs. Outbound is more credible when it links the offer to specific operating measures: fewer wasted journeys, faster quotation-to-job handover, clearer evidence of completed work, better contract-margin visibility and less manual administration for engineers and service coordinators.
How this list is built
Data sources
This list is built from UK Companies House filings, XBRL accounts data, and semantic analysis of each company's public website. 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.
Classification
Rather than relying solely on SIC codes, Firmbase classifies each company semantically: the company's website is crawled, an AI model reads what the company actually sells, and the company is placed into the relevant industry and subsectors. SIC codes are used as one signal but not the only one. This means a company that registered under a generic SIC code but pivoted into (for example) fintech is correctly identified as fintech, not as its original SIC category.
Freshness
The underlying company data is refreshed from Companies House continuously; filings appear in the list within days of submission. The curated list ordering is regenerated when the underlying data moves meaningfully (company count changes by more than 5%, a new company enters the top-ranked segment, or the filed-revenue numbers for the top firms change). You can see the last-updated timestamp near the top of the page.
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