Ductwork Installation Contractor Commercial packages.
Installed to project scope.

Rectangular Circular / Spiral Flat Oval Fire-Rated Stainless Steel Pre-Insulated

We install HVAC ductwork for student accommodation, hotels, retail units, offices, commercial fit-out and industrial projects across the UK. Full subcontracting packages for M&E contractors and main contractors.

Installation is delivered to the agreed drawings, specification and defined project scope. Testing, reporting and handover requirements are agreed for each package.

Ductwork Types We Install

Project-specified installation
01
Standard commercial

Rectangular Ductwork

Low-velocity supply and extract systems for offices, retail, hotels, education and healthcare. Galvanised mild steel, fabricated and installed to DW/144 class B or C as specified. The most common ductwork type in commercial buildings.

Where: offices · retail · hotels · education · healthcare

02
High velocity / plant rooms

Circular & Spiral Ductwork

Circular and spiral-wound ductwork for high-velocity distribution systems, plant rooms, risers and industrial applications. Lower pressure drop and reduced air turbulence compared to rectangular. Suitable for exposed architectural finishes.

Where: plant rooms · industrial · PBSA · exposed ceiling

03
Low-clearance installations

Flat Oval Ductwork

Flat oval combines the airflow efficiency of circular ductwork with a lower profile for space-constrained installations — narrow ceiling voids, corridor runs and above-ceiling fit-out. Ideal where coordination with structure and other services is critical.

Where: retail fit-out · offices · corridors · ceiling voids

04
Fire safety systems

Fire-Rated Ductwork

Fire-rated ductwork may form part of a defined installation package where the product, tested system, drawings, specification and responsibilities are clearly identified before work starts.

Where: kitchen extract · smoke systems · compartment walls · stairwells

05
Hygiene-critical environments

Stainless Steel Ductwork

Grade 304 or 316 stainless steel ductwork for commercial kitchen extract, catering, food production, cleanroom and marine applications. Resistant to grease, moisture and corrosion. Welded or flanged to TR19 grease hygiene standard where applicable.

Where: commercial kitchens · food production · cleanrooms · marine

06
Thermal & acoustic performance

Pre-Insulated Ductwork

Phenolic foam or mineral wool pre-insulated ductwork panels for supply air systems requiring high thermal performance and low condensation risk. Factory-insulated panels with aluminium facing. Reduces site labour and improves consistency compared to post-installation insulation.

Where: cold rooms · data centres · AHU supply systems · cleanrooms

07
Final connections

Flexible Ductwork

Insulated and non-insulated flexible ductwork for final connections from rigid distribution to grilles, diffusers and terminal units. Low-vibration links to fan coil units and AHUs. Installed to maximum 1.5m runs per DW/144 guidance.

Where: FCU connections · diffuser drops · VAV terminals · MVHR valves

What's Included

Full Ductwork Subcontracting Package

The exact package is agreed from the drawings, specification, programme and scope of works.

Drawing Review & Coordination

We review issued drawings and specifications, identify coordination clashes with structural and other M&E services, and raise RFIs before site start — not during installation.

RAMS Documentation

Method statements and risk assessments specific to the project — issued before site start. Updated if scope, access or working conditions change. Signed copies to client for site record.

Ductwork & Supports Installation

Installation of the ductwork runs, hangers, brackets, sleeves and supports identified within the agreed project scope.

Fire Dampers & Access Panels

Interfaces involving specified fire or smoke products are reviewed against the product system, drawings and agreed responsibilities before inclusion in scope.

Grilles, Diffusers & Terminal Devices

Supply and installation of all air terminal devices — linear diffusers, circular ceiling diffusers, transfer grilles, adjustable-blade grilles and acoustic attenuators as specified.

Air Leakage Testing

Air leakage testing and associated records may be included where specified and agreed within the package.

Progress Photo Reports

Photographic progress reporting can be agreed at key installation stages where required by the project team.

O&M Documentation & Handover

Operation and maintenance information, as-built records and supporting handover documents can be agreed within the project scope.

Sectors We Install Ductwork For

All sectors
Student Accommodation

Ductwork installation support for contractor-led student accommodation projects.

Hotels & Hospitality

Defined ductwork packages for hotel and hospitality project environments.

Retail & Shopping Units

Supply and extract ductwork installation support for retail and commercial units.

Offices & Commercial

Rectangular and spiral ductwork for office fit-out, commercial refurbishment and new build. VAV systems, FCU connections, riser ductwork.

Education

Supply and extract ductwork for schools, colleges and universities. Acoustic attenuators, low-velocity distribution to classrooms and lecture theatres.

Healthcare & Care Homes

Ventilation ductwork for care homes, GP surgeries and healthcare facilities. Filtration, isolation room supply/extract, hygiene-critical installations.

Leisure & Golf Clubs

Ventilation ductwork for leisure facilities, clubhouses and sports buildings. Ongoing: Dunbar Golf Club, East Lothian.

Industrial & Warehouse

Spiral and circular ductwork for industrial extract, process ventilation and warehouse HVAC. Large-diameter runs, high-volume systems, structural steelwork coordination.

Project in Focus

All projects
MEV ductwork installation — Central Quay student accommodation Glasgow
Selected Project Name

Central Quay

Selected project environments include student accommodation, hospitality, commercial buildings, retail and contractor-led construction projects.

Project Central Quay
Sector Student accommodation environment
Information Name-only project reference
Discuss a similar project

For M&E Contractors

Ductwork Subcontracting Packages

We provide defined ductwork installation packages to M&E contractors and main contractors across the UK. Send drawings and project information for review.

  • Full RAMS documentation — method statements and risk assessments specific to your project, issued before site start
  • Site coordination — communication arrangements agreed for the package
  • Progress photo reports — at key stages throughout installation, shared with your team
  • Testing where specified — requirements and records agreed within scope
  • £10m EL · £5m PL insurance — details available during prequalification
  • CSCS-carded site operatives — IPAF and PASMA competency available where required
Cliventa Engineering ductwork installation team on elevated platform

Ductwork Installation — FAQs

DW/144 is a BESA specification for sheet metal ductwork. Where it is identified in the project specification, the applicable requirements are reviewed alongside the drawings and agreed installation scope.
Air leakage testing and related records may be included where specified. The exact responsibility, test class and handover information must be agreed within the package.
A fire-rated ductwork package can be reviewed where the specified product system, drawings, installation requirements and responsibilities are clearly identified. Inclusion is subject to scope review.
Package suitability depends on scope, location, programme, access and availability. Send the project information and the team will confirm whether the opportunity can be supported.
Send drawings, specification, scope, location, programme dates and tender deadline. Our team will review the package and come back with clear next steps. Mobilisation is agreed based on scope, location, programme and availability.
Cliventa has an operational base in Scotland and supports suitable contractor-led ductwork installation packages across the UK.

Ready to Discuss a Ductwork Package?

Send your drawings and project information. Our team will review the package and come back with clear next steps.