What Imperial Ductwork Services does

Imperial Ductwork Services Ltd (IDSL) is a privately held UK ductwork manufacturer and installer founded in 1997, headquartered in Sidcup, Kent, with two manufacturing facilities in Dartford and an office in the City of London. The company specialises in the design, manufacture and installation of DW144 galvanised and stainless steel ductwork ventilation systems for commercial, residential, educational, life-science, rail, pharmaceutical, data centre and sports projects across London and the South-East of England. Its operations are vertically integrated across in-house CAD/3D BIM design, automated CGF ductwork fabrication, installation contracting, air conditioning (Imperial AC) and, since 2019, an in-house passive fire protection R&D division called Imperial Fire Solutions (IFS).

IDSL's revenue model is project-based, driven by tender enquiries, early design involvement and turnkey airside packages supplied directly to Tier 1 main contractors and developers such as Skanska, Mace, BAM, Brookfield Multiplex, Canary Wharf Group and HB Reavis. Contract values disclosed across its case-study portfolio range from approximately £30,000 (MasterChef TV studios) to £19.5m (a Mace football stadium project). Through its IFS division, IDSL has invested approximately £5m in developing two proprietary fire protection product platforms — IFS-DS fire resistant ductwork (BS EN 1366-1, 8 & 9) and IFS-ES service enclosure systems (BS EN 1366-5:2021) — both third-party accredited by FIRAS and LPCB LPS 1531. Manufacturing is increasingly powered by ArcelorMittal XCarb recycled and renewably produced steel, targeting over 1,000 tonnes of lower embedded carbon procurement by end of 2025.

The company holds 15+ industry accreditations including ISO 9001, 14001 and 45001, RoSPA President's Award (12 consecutive Golds), CHAS Elite, Constructionline Gold, Achilles BuildingConfidence, PlanetMark and Considerate Constructors Scheme registration, alongside Daikin D1+ Premium and Mitsubishi Electric Diamond Quality Partner accreditations for its Imperial AC division. Distribution is exclusively direct enterprise field sales with no reseller or marketplace channels; geographic footprint is concentrated in London and the South-East. Sister company Imperial Hygiene Solutions Ltd (IHSL) extends the lifecycle relationship into cleaning, kitchen extract and fire damper maintenance.

Name

Imperial Ductwork Services

Legal name

Imperial Ductwork Services Ltd

Website

https://imperialductwork.co.uk

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

251–500 employees

Short description

Imperial Ductwork Services Ltd is a UK-based manufacturer and installer of DW144 ductwork ventilation systems, air conditioning, and proprietary passive fire protection products, serving commercial, residential, data centre and infrastructure clients across London and the South-East.

Ownership category

akta.pro rank

Product category

Ductwork Ventilation Manufacturing and Installation

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (23822), Plumbing, Heating, and Air-Conditioning Contractors (238220)

SIC

Steel Pipe & Tubes (3317)

akta.pro primary industry

Sheet Metal & Ductwork Contracting (IMAFALAH)

akta.pro secondary industries

Ductwork Installation & Replacement (Supply/Return) (HSAOAGAC), Ductwork, Duct Fittings & Air Distribution (Diffusers/Grilles/Registers) (IMADANAC), Duct Sealing, Insulation & Airflow Balancing (HSAOAIAH)

Keywords

• Ductwork manufacturing services
• Ventilation installation
• Fire resistant ductwork
• Passive fire protection
• HVAC air conditioning

Headquarters

HQ city

Sidcup

HQ country

United Kingdom

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Ductwork Manufacturing and Installation Contracts: IDSL generates revenue through project-based contracts ranging from traditional sub-contract ductwork supply-and-install packages to full airside turnkey installations. Revenue is earned from the manufacture, supply, and installation of galvanised ductwork, fire resistant ductwork, and service enclosure systems. Projects are priced via tender enquiries and detailed quotations produced by the in-house estimating team.
2. Air Conditioning Installation and Maintenance: Revenue from air conditioning installation services including VRV/VRF systems, close control systems for data centres, split and multi-split systems, and de-commissioning of older refrigerant-based systems. Services provided through certified Daikin D1+ Premium and Mitsubishi Electric Diamond Quality Partner accreditations.
3. Turnkey Airside Package Management: IDSL offers full turnkey airside packages, procuring and managing entire projects for client convenience, which includes design verification, CDP, procurement of all ventilation equipment and associated specialist sub-contractors.
4. Imperial Fire Solutions (IFS) - Passive Fire Protection: IFS, the in-house R&D division, manufactures, supplies and installs fire resistant ductwork and service enclosure systems, generating revenue through product supply and installation of passive fire protection solutions.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels8 records

Core offering

Imperial Ductwork Services Ltd (IDSL) designs, manufactures, and installs ductwork ventilation systems for commercial, residential, and industrial buildings across London and the South-East of England. The company operates two manufacturing facilities in Dartford, Kent, producing galvanised and stainless steel DW144 ductwork, and runs in-house CAD/BIM design and installation contracting capabilities. It also offers air conditioning services (Imperial AC) and, through its Imperial Fire Solutions (IFS) division, develops and installs proprietary fire resistant ductwork and service enclosure systems.

Product overview

Imperial Ductwork Services Ltd (IDSL) operates as a multi-divisional company offering an integrated suite of ductwork and fire safety products and services. The core offering consists of manufacturing (DW144 galvanised and stainless steel ductwork), installation & contracting, in-house CAD/3D BIM modelling, estimating, and quality/health & safety services. The company is structured around two main divisions: Imperial AC for air conditioning services (VRV/VRF, Close Control systems) and IFS (Imperial Fire Solutions) for passive fire protection. IFS encompasses two proprietary products: the IFS-ES Service Enclosure System (BS EN 1366-5:2021 compliant enclosure for protecting services during fire) and the IFS-DS Fire Resistant Ductwork System (BS EN 1366-1, 8 & 9 compliant fire resistant ductwork). A sister company, Imperial Hygiene Solutions Ltd (IHSL), handles cleaning services. The product portfolio is unified through in-house manufacturing, CAD design, and installation capabilities, with a focus on sustainable green steel manufacturing using ArcelorMittal XCarb® materials.

Differentiator

Problem solved

Functional benefit

Brands

• Imperial Fire Solutions (IFS): In-house technical and R&D division specializing in passive fire safety, including fire resistant ductwork and service enclosure systems
• Imperial AC
• Imperial Hygiene Solutions Ltd (IHSL)

Products and services

• Ductwork Manufacturing In-house ductwork manufacturing producing galvanised steel and 304-grade stainless steel rectangular and circular DW144 ductwork, along with fire resistant ductwork and service enclosure systems at two Dartford facilities using CGF automated fabrication machinery.
• Installation and Contracting Complete ductwork installation services from conception to completion, handling both standard and bespoke installations for commercial, residential, and industrial properties, ranging from sub-contract supply-and-install packages to full airside turnkey installations.
• Imperial AC Air Conditioning Services Air conditioning installation and services including VRV/VRF heat pump and heat recovery systems, Close Control Air Conditioning for data centres and comms rooms, Split and Multi-Split systems, and de-commissioning of older refrigerant-based systems. Delivered through certified Daikin D1+ Premium and Mitsubishi Electric Diamond Quality Partner accreditations.
• IFS-DS Fire Resistant Ductwork System High-performance fire resistant ductwork system tested to BS EN 1366-1, 8 & 9 and classified to BS EN 13501-3 for ventilation ducts and BS EN 13501-4 for smoke control ducts. Single compartment ducts achieve E600 120 classification and multi-compartment ducts achieve EI 120. Produced using CGF automated ductwork fabrication machinery enabling mass-production of fully framed ducting with zero frame leakage.
• IFS-ES Fire Resistant Service Enclosure System Factory-prefabricated, pre-insulated fire resistant service enclosure system tested to BS EN 1366-5:2021, achieving EI 120 classification. Protects services for over two hours, maintains temperatures below 140°C average and 180°C maximum, with IP5X dust protection and IPX6 water jet resistance, and passed Indoor Air Comfort Gold standard for VOC emissions.
• Ductwork Estimating and Turnkey Airside Packages Ductwork pricing and turnkey airside package management services using digital takeoff software and Ensign's Ductwork Estimating software, with over 100 years of combined estimator experience. Includes design verification, CDP, procurement of all ventilation equipment, and management of associated specialist sub-contractors.
• CAD and 3D BIM Modelling In-house CAD department producing 3D BIM fully coordinated CSD models and detailed 2D HVAC manufacture and installation drawings using a proprietary customised drawing database combined with industry-rated drawing software platforms.

Quantifiable outcome

• 59.3% absolute reduction in Scope 1 and Scope 2 emissions (market-based) vs previous year
• +6 more outcomes

Named customers15 records

Segments8 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Ten partnerships are on record, tiered core.

• ArcelorMittalcoreStrategic or Co-development PartnerStrategic partnership for the supply of XCarb recycled and renewably produced steel. By end of 2025, IDSL targets procurement of over 1,000 tonnes of lower embedded carbon (LEC) steel from ArcelorMittal, reflecting 1,694 tonnes CO2e life-cycle savings. XCarb steel reduces CO2 emissions by 65% compared to traditional steelmaking.
• Daikin UKcoreStrategic or Co-development PartnerIDSL is a Daikin D1+ Premium Partner, recognised by Daikin UK for high standards of installation and expertise. This accreditation offers customers assurance of professionalism, training, and accreditation, and typically comes with extended warranties.
• Mitsubishi ElectriccoreStrategic or Co-development PartnerMitsubishi Electric Business Solutions Partner (BSP) for their diamond-tier programme established in 2005, elevating industry standards through highly professional installers, ensuring the highest level of installation and aftersales care, and offering customers an upgraded five-year warranty.
• Fire Protection LtdcoreTechnology or IntegrationKey supplier of fire rated ductwork and insulation on multiple IDSL projects. Collaborated on smoke extract systems at 80 Fenchurch Street (with Skanska) and supplies/installs fire rated ductwork on various other projects.
• Advanced AircoreTechnology or IntegrationSupplier of smoke control dampers (DIUs) and motorised fire/smoke dampers on IDSL projects including Western Yards BY2 and Farringdon East OSD.
• PlanetMarkcoreStrategic or Co-development PartnerSustainability certification partner. IDSL has achieved PlanetMark Business Certification for two consecutive years, demonstrating 59.3% absolute reduction in Scope 1 and Scope 2 emissions and 64.5% reduction per employee.
• Supply Chain Sustainability SchoolcoreStrategic or Co-development PartnerActive member of the Supply Chain Sustainability School, gaining access to regular CPD training and ongoing tailored support to achieve sustainability goals across the built environment industry.
• Achilles (BuildingConfidence)coreStrategic or Co-development PartnerUK's highest level of construction accreditation connecting discerning buyers with rigorously pre-qualified sub-contractors and suppliers, providing unrivalled supply chain transparency and reporting confidence.
• EfectiscoreStrategic or Co-development PartnerIndependent fire testing assessor with over 100 years of experience. IFS has conducted 31 tests in conjunction with Efectis at testing houses in Czech Republic, France and Turkey, to verify fire performance of IFS-DS and IFS-ES systems.
• PAVUScoreStrategic or Co-development PartnerIndependent fire testing assessor collaborating with IFS on fire testing of fire resistant ductwork and service enclosure systems. Combined experience of over 100 years assessing fire performance of products, systems and constructions.

Scale indicators8 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Western Air Ducts: UK-based ductwork manufacturer and installer offering galvanised and stainless steel ductwork supply and installation for commercial, residential and industrial projects. Directly competes with IDSL on DW144 ductwork tenders across the UK, including the London/South-East region.
• Ductform Fabrications: UK manufacturer of ductwork, ductwork fittings and air distribution products. Closely comparable to IDSL's manufacturing side, competing on rectangular and circular DW144 ductwork supply into the same main contractor base.

Broad incumbents

• NG Bailey: One of the UK's largest independent building services (M&E) contractors delivering HVAC, electrical and ductwork installations for commercial and infrastructure projects. Competes with IDSL for large London commercial ductwork packages but operates at far greater scale across multiple building services.
• TClarke: London-headquartered M&E and building services contractor with a strong commercial and high-rise residential project portfolio. Comparable to IDSL on the airside installation side of major London developments while also delivering electrical and full M&E packages.
• Shepherd Engineering Services: UK mechanical and electrical building services contractor providing HVAC, ductwork and process engineering for commercial, data centre and life sciences projects. Competes with IDSL on commercial ductwork installation and air conditioning integration, particularly on data centre builds.
• Briggs & Forrester: UK mechanical, electrical and public health building services contractor operating across commercial, healthcare and residential schemes. Comparable to IDSL as a customer of, and potential competitor for, ductwork and fire-rated systems on commercial real estate schemes; listed as an IDSL customer on One Exchange Square.
• SPIE UK: Major European technical building services contractor with UK mechanical services operations delivering HVAC, ductwork and energy efficiency upgrades. Comparable to IDSL on commercial HVAC and ductwork retrofit/maintenance work while operating across multiple geographies and services.
• Cape Environmental Services: UK provider of mechanical and HVAC services including ductwork installation, ventilation maintenance and air conditioning. Competes with IDSL on London and South-East commercial and data centre projects but offers broader facilities management alongside installation.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/idslductwork
• Facebookfacebook.com/profile.php?id=100091684370717
• LinkedInlinkedin.com/company/imperial-ductwork-services-ltd
• Instagraminstagram.com/imperialductworkservicesltd

Compliance20 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries3 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Imperial Ductwork Services