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Pressurisation smoke ventilation systems
Creating pressure to keep escape routes clear
Pressurisation systems maintain a positive air pressure in stairwells and lobbies to prevent smoke from entering escape routes. By keeping air flowing in the right direction, these systems protect occupants and assist firefighting operations in multi-storey buildings.
Not sure where to start?
Book a Discovery CallHow pressurisation systems work
Stage 1
A fire alarm signal activates the system, closing dampers and opening designated air supply routes.
Stage 2
Fans supply clean air to protected zones (e.g., stairwells and lobbies), increasing air pressure relative to the fire zone.
Stage 3
The pressure difference prevents smoke from entering protected areas, ensuring clear escape routes and safe firefighter access.
Note: System design and control strategy vary by building height and layout.
Sertus products used in pressurisation systems
Where pressurisation systems work best
Pressurisation systems are essential in high-rise or complex buildings where simple natural or mechanical systems cannot maintain clear escape routes under all fire scenarios.
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High-rise buildings
Typically used in tall residential or commercial buildings to protect stair cores and lobbies.
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Complex layouts
Ideal for buildings with deep plans or multiple cores where consistent smoke control is required.
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Critical facilities
Common in hospitals, data centres, and high-occupancy environments where resilience is vital.
Confused by the options? We’ll help you make the right call.
Speak to an ExpertGuidance & Legislation
Pressurisation systems are governed by specific British Standards and must be carefully designed to maintain required pressure differentials under all conditions.
Not sure if a pressurisation system is right for your building? Our technical team can help you choose the best approach.
Speak to an ExpertSee Our Systems in Action
Explore real-world projects where Sertus smoke control solutions protect lives and properties – from natural to mechanical systems across residential and commercial buildings.
Merseyside Fire & Rescue Training Academy
Liverpool
Sector
Public
System Type
Mechanical, Natural
Location
Liverpool
Client
Maclec
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Station Quarter
Northamptonshire
Project Name
Station Quarter
Location
Northamptonshire
Sector
Residential
Client
Gallico Systems
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Learn more
Want a deeper understanding?
Our CPD sessions cover the principles behind all major smoke ventilation system types – including how pressurisation fits into wider design strategies for safety and compliance.
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