How is a ventilation installation package agreed?

Installation is delivered to the agreed drawings, specification and defined project scope. Testing, records and handover requirements are agreed within that package.

Do you provide ductwork installation as a subcontracting package?

Yes. Cliventa supports M&E contractors and main contractors with defined ventilation and ductwork installation packages across Scotland and the UK.

Ventilation & Ductwork Installation

Q: What is the difference between MEV, PIV and MVHR?

MEV (Mechanical Extract Ventilation) extracts stale air from wet rooms. PIV (Positive Input Ventilation) pushes fresh filtered air into a property. MVHR (Mechanical Ventilation with Heat Recovery) both extracts stale air and supplies fresh air while recovering heat energy. The right system depends on building type, use and energy performance targets.

Ventilation and ductwork installation for contractor-led commercial and construction projects across Scotland and the UK.

Installation support for specified MVHR, MEV and PIV packages, subject to drawings and scope review.

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Ventilation Systems We Install

System Type 01

MEV

Mechanical Extract Ventilation

A mechanical extract system using a fan unit and ductwork network. Installation requirements depend on the issued design, equipment schedule, routes and defined project scope.

Mechanical extractSpecified systemsCommercial projects

System Type 02

PIV

Positive Input Ventilation

A positive input system supplies filtered air through a specified unit and distribution arrangement. Equipment location, terminals, electrical interfaces and access must be defined by the project information.

Positive inputSpecified systemsScope review

System Type 03

MVHR

Mechanical Ventilation with Heat Recovery

A mechanical system that extracts air and supplies filtered replacement air through a heat-recovery unit. Installation is coordinated around the issued equipment, duct routes, terminals and controls.

Heat recoverySpecified systemsCommercial projects

Full Scope of Works

What's Included in a Ventilation Package

Survey, installation, testing, documentation and handover elements are included where identified in the agreed scope.

Site Survey & Assessment

Existing conditions, access and installation information can be recorded where a survey is included in scope.

Ductwork Installation

Rigid and flexible ductwork in galvanised steel, PVC or insulated systems. Hangers, brackets and supports included.

Fan Unit Installation

Installation support for the specified fan units, equipment and interfaces included in the agreed package.

Grilles, Valves & Terminals

Supply and fit of all air terminal devices — grilles, circular valves, linear diffusers, transfer grilles and attenuators.

Testing & Records

Testing, commissioning and record requirements may be included where specified and agreed.

Documentation & Handover

Project documentation and handover requirements are agreed within the defined scope.

Subcontracting Packages

Working With M&E Contractors

We provide defined ductwork and ventilation installation packages to M&E contractors and main contractors across Scotland and the UK.

✓Drawings, specification and scope reviewed
✓Programme and access requirements agreed
✓Documentation requirements defined by scope
✓CSCS-carded site operatives
✓Public Contracts Scotland supplier profile available
✓£10m EL and £5m PL insurance held

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Ductwork installation in commercial building — Cliventa Engineering

Ventilation Installation — FAQs

What is the difference between MEV, PIV and MVHR?

MEV is a mechanical extract system. PIV is a positive input system. MVHR extracts air and supplies filtered replacement air through a heat-recovery unit. The project design and specification determine which system is required.

Can you work from drawings and specifications?

Yes. Installation is delivered to the agreed drawings, specification and defined project scope. Queries and interfaces are identified during package review.

Do you provide testing and commissioning?

Testing, commissioning and record requirements may be included where specified and agreed within the package. Send the relevant schedules and handover requirements with the RFQ.

How quickly can you mobilise for ventilation works?

Mobilisation is agreed based on scope, location, programme, access and availability. Include proposed dates and the tender deadline with your project information.

Ready to Discuss Your Ventilation Project?

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

Request a Quote +44 7388 088741