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Underground Rail Ventilation Design Consultant 2026 Tender
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In context
This is a contract notice published by a government body covering consulting. Delivery covers United Kingdom. It is classified under Energy Efficiency and Climate Adaptation against the sustainability taxonomy rather than matched on keywords.
This tender procures design consulting services for replacement of ventilation attenuators in an underground rail-tunnel shaft at a major UK airport hub to improve safety, resilience and maintenance of underground rail ventilation systems. The successful bidder must have expertise in underground rail ventilation resilience, airflow modelling, and attenuator specification under operational network constraints.
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About this tender
The T5D Rail-tunnel Ventilation Shaft is located adjacent to Terminal 5D at Heathrow Airport, accessible from Level 6 (trackside of the HEX tunnel) and Level 7 (Airside). The primary objective is to replace four end-of-life attenuators within the T5D Shaft. The renewal aims to reduce the risk of debris entering fans, tunnels, and station areas; prevent fan failure in fire scenarios; and provide ventilation and smoke clearance for the Heathrow Rail Tunnels, thereby improving safety conditions and system resilience while reducing ongoing maintenance and repair requirements. …
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