The smoke exhaust system is an important element for the fire protection of a building. In case of fire, the greatest danger for the occupants does not stem from the flames but rather from smoke: 90 % of all fire victims die from the toxic smoke.
In case of fire, smoke and fumes rise as a result of thermal soaring and form a layer of smoke gas below the ceiling which quickly fills the entire room.
A fume outlet in the upper part of the façade or in the roof allows smoke and heat to escape. Intake openings in the lower area increase the thermal lift.
In case of fire in the building, smoke in the lift shaft is detected at an early stage by a smoke suction system which monitors the entire shaft. The fume outlet in the upper area of the lift shaft is opened by an electric motor. The smoke can then escape unhindered.
In addition to triggering the smoke exhaust function, LSC gives a signal to the lift control which takes the lift to the pre-determined evacuation level, generally the main entrance area which is also monitored by a smoke alarm. When this smoke alarm goes off, the lift is diverted to the second evacuation level. This guarantees a safe emergency exit in case of fire.
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