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When Corridor Smoke Ventilation is Required
Corridor smoke ventilation is required where corridors form part of a building’s protected escape route, helping keep evacuation routes clear during a fire.
Requirements are set out in Approved Document B, with further guidance from BS 9991 and BS 9999.
Every corridor smoke ventilation system should be designed around the building’s layout, occupancy and fire strategy. We review your project requirements to recommend a compliant solution tailored to your building.
Typical Corridor Smoke Ventilation Setup
Most corridor smoke ventilation systems include:
- An AOV window or glazed louvre (where external access is available)
- A smoke shaft with dampers on each level (for internal corridors)
- A control panel and smoke detectors
- Manual override (break glass) units
- Backup power supply
Where corridors connect into stairwells, it is ventilated using an AOV at the head of the stairwell, helping to keep the escape route clear if doors are opened.
Key Considerations When Planning Corridor Ventilation
Internal vs External Corridors
Taller buildings may require mechanical systems where natural ventilation is not sufficient.
External Corridors
Where a corridor has external access, smoke can often be ventilated using with a facade AOV. For corridors on the top floor with access to the roof, a roof AOV can be used.
Internal Corridors
Where there is no external access, smoke is typically extracted using a smoke shaft with dampers on each level or a mechanical smoke ventilation system.
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Complete Smoke Ventilation Solutions
Corridor smoke ventilation can form part of a wider smoke ventilation system.
Corridors may be ventilated using AOV windows where there is external access or using smoke shafts with dampers on each level for internal layouts.
Stairwells are ventilated separately using AOVs at the head of the stair.
In larger or more complex buildings, these zones may form part of a larger, multi-zone smoke ventilation system.
Whether you’re at the planning stage or ready to order, our smoke ventilation specialists can review your drawings, recommend a compliant solution and support your project from specification through to delivery.