Project IWBC Imperial College London

A £150 million Research and Translation Hub, providing high specification, multidisciplinary research space for 1,000 scientists and engineers and state-of-the art incubator space for spinout companies.

Project Value to ECE

Block C Fit Out £378,456 (Completed within a 5 week manufacturing slot)

West Building C £197,355 (Completed within a 3 week manufacturing slot)

West Building D £148,728 (Completed within a 3 week manufacturing slot)

System Description

The mechanical ventilation to the clean room suite is provided by a dedicated supply AHU. The supply AHU provides a combination of outdoor air and recirculated air in accordance with the air change requirements.

Outdoor air is delivered from the central basement supply ventilation system. This is supplied on a variable volume basis via a VAV box.

The AHU filters, heats and cools the air as required to serve the clean room spaces.

The pressure regime maintains the flow of air from clean to dirty spaces. Wall mounted pressure stabilisers maintain the required pressures between the spaces as required to protect doorways in accordance with the clean room specialist designers requirement.

Supply air is delivered from the AHU via galvanised steel ductwork at high level into the clean room suite via the services corridor located adjacent to the clean rooms. This houses all balancing dampers so as to provide access to maintain and/or adjust as required. The supply ductwork runs at high level within the ceiling void and connects to terminal HEPA filter diffusers at high level.

Return air is from low level and ducted to high level where it’s distributed above the ceiling back to the AHU to be recirculated. Return air ducts from the suite are fire rated and connected to the central basement smoke extract system via a combination of normally closed and normally open smoke dampers.

Extract air is via the fume cupboards, local extract ventilation arms and dedicated extract grilles in each space in accordance with the clean room specialist’s design. This connected into the central fume cupboard extract system.

The AHU was provided with duty/standby motors for resilience.

Full monitoring of the room pressure is provided with a full indicator panel.

Air Handling Unit Specification

The packaged air handling units incorporated all the components necessary to provide an efficient and effective source of air distribution, i.e. fans, filters, coils, heat recovery etc.

The AHUs were sized to take into account all key factors including specific fan power, air volume, heating/cooling requirements, humidity control (where applicable), space availability and noise levels.

The AHU is capable of providing 22.0m3/s at 350 Pa external system resistance with a total pressure rise capability of 1850 Pa.

Units were selected to provide the required duty at optimum performance and efficiency and included clean and dirty filter automatic sensing and fan speed adjustment.

The AHU conformed to the following criteria as stated in BS EN 1886:2007:-

  • Thermal bridging – Class T2
  • Thermal bridging factor – Class TB2
  • Casing strength – Class D1

Primary and secondary air filtration conformed to BS EN 779: 2012 for filter performance.

All filters are Eurovent certified and tested to BS EN 1886: 2007 for air leakage and performance.

BS EN 1822 for High Efficiency Air Filters (HEPA)

BS EN ISO 14644 Cleanrooms and Associated Controlled Environments

Where high efficiency filters were incorporated in to the AHU, all filter cells were within purpose made frames. This ensured that the complete assembly conformed to BS 3928 and DIN 1946. Every filter case had to demonstrate a sound individual construction to perfect each seal. 

At practical completion of the every HEPA filter installation was tested in accordance with BS EN ISO 14644, BS 5726 and BS EN 12469.


Controls Specification

As a Trend Controls partner our greatest advantage on the project is we design and manufacture the software and hardware.

The packaged plant control panel utilised IQ4E Trend controllers for their final control.

Schematic pages were provided for each item of plant supplied on the project. A standard schematic page format for an item of plant consisted of two pages. The first page a view only page indicating the true operation of the plant. The second page was adjustments page showing all available plant settings.

25% spare input and 25% spare output capacity was allowed to accommodate additions to the system.


Client Portal and Asset Information

All plant and equipment were allocated an asset code, generated by ECE UK Limited.

You can enter that asset code on our websites client portal:

The web based portal holds the following information:

  • Air Handling Unit 2D DWG
  • Air Handling Unit 3D IFC
  • Air Handling Unit IOM
  • Air Handling Unit Recycling Manual
  • Air Handling Unit Controls Philosophy
  • Controls Wiring Diagram
  • Control Points List
  • Commissioning Report
  • Full list of parts and spares which are available from 


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