SHEV: Buildings
The main objective of an SHE (Smoke and Heat Extraction) system in buildings is to enable smoke-free evacuation of occupants. These systems are designed in accordance with NBN S21-208-1 or EN12101-5.
Due to the thermal behavior of smoke, fans or smoke vents are installed at the highest possible level to remove heat and smoke. Such a system can only function correctly if there is sufficient air supply at the lower part of the space to allow fresh (cool) air to enter.
RWA ensures that the formation of a hot smoke layer under the ceiling is stabilized and controlled, which helps delay or even prevent flashover (i.e. materials catching fire from heat without coming into contact with flames).
The thermal load on the roof's supporting structure is limited to temperatures at which the stability of an unprotected or minimally protected structure can still be maintained.
Smoke and heat extraction in buildings can be designed according to two standards:
1. Single-storey buildings
For this application, the Belgian standard NBN S 21-208-1 is used.
2. Multi-storey buildings
In this case, the European Standard EN 12101-5 serves as the calculation basis. Examples include shopping centers and office buildings. Altebra Waregem provides complete installations for these applications, including all necessary ductwork. Our team in Waregem includes experienced specialists who can assist you with the design and implementation of your installation.