Like the fire alarm system, the smoke and heat exhaust system (RWA) is also part of the integrated fire protection solutions for buildings. In special buildings, according to building regulations, smoke and heat exhaust ventilation systems (RWA) are required by law. The type and extent to which a smoke and exhaust system is necessary usually describes the fire protection concept. SHE’s are planned according to DIN 18232.
Smoke heat exhaust
There are different types of smoke and heat exhaust ventilation systems:
- natural smoke extraction systems (NRA)
- Thermal buoyancy principle, without machine support
- Mechanical smoke extraction systems (MRA)
- Smoke and heat exhaust with motor drive (eg smoke gas fans)
- Smoke differential pressure equipment (RDA) (With overpressure, for example, a staircase is kept free of smoke)
- Elevator manhole smoke removal (e.g., firefighting lifts)
- Garage smoke removal
- Heat exhaust
An opening in the wall or in the roof surface which opens only at a certain temperature, for example by melting thermoplastic roof light elements.
Natural smoke and heat exhaust systems can be controlled pneumatically or electrically. The pros and cons of these two different features.
All smoke and heat exhaust systems follow the protection goals which enable the self-rescue of persons in which persons can see and breathe to facilitate the alien rescue in which rescue workers can see and orient themselves better protect the assets or assets of importance to the company, in which smoke can not reach the other uninhabited parts of the building. Avoid downtime by supporting fire fighting and preventing smoke from spreading.
As is known, in a fire in a building is not the most dangerous fire, but the resulting fire gases or smoke. Depending on what burns in a unit of use (fire load), various fire gases, which can be both corrosive to the skin, on the other hand cause life-threatening injuries in the respiratory tract. The main product of a combustion is mostly carbon monoxide (CO). Three or four large breaths of substance CO are enough to reduce the chances of leaving the building alive to almost zero percent.
It is all the more important that flue gases from escape routes be quickly withdrawn.
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