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Many buildings include one or more atriums. In some cases, evacuation must take place through these atriums. If a fire breaks out in such an atrium or in adjacent spaces, the area will gradually fill with smoke. As a result, corridors may become unusable for evacuation within a short time due to high smoke concentrations. Additionally, rising temperatures increase the risk of spontaneous ignition (flashover) of materials used in the atrium. Similar problems can occur in other tall spaces, such as industrial halls.
In such cases, a smoke and heat extraction system (SHE) can offer a solution. After fire detection in a specific area, intake openings (below the smoke layer) and exhaust openings (at the top of the space) are activated to remove the hot smoke.
To determine how quickly the space or corridors in an atrium will fill with smoke and what the temperature of the smoke layer will be, calculations can be performed based on NEN 6093 or using a CFD model. By calculating multiple scenarios, the optimal smoke and heat extraction system can be designed.
We have been actively involved in the development of the latest version of NEN 6093.
