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System Information
Natural Smoke Ventilation Systems
What they are, how they work and where you can use them.
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How natural systems work.
Stage 1
A signal is received from the fire alarm system.
Stage 2
Head of stair, and shaft and/or facade vents on the floor of origin open. Vents on all other floors remain shut
Stage 3
Due to the buoyancy of the hot gases and the drawing effect of the shaft, the smoke is drawn up the shaft and out of the building.
Systems will vary depending on building layout.
Where you can use them.
Natural systems are the default option - you should consider these as your first port of call.
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Low-rise buildings
Natural systems are best suited for shorter buildings due to the risk of smoke-logging in the shaft. We’d recommend no higher than 18m.
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No extended corridors
Natural systems can be used on code-compliant buildings. In particular, you can’t have extended corridors.
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You've got room
Natural systems require a 1.5m2 shaft through the building which can’t be used by any other services.
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Examples of our natural projects.
Ever wondered what sort of buildings use natural systems? Here's a few case studies to give you some ideas.
Technical Specifications
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