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waterproofed roof dry roof skybelt fire safety natural smoke and heat extraction ventilation dome R17 daily ventilation fire protection fire safety system pneumatic control smoke and heat extraction smoke extraction system skylight overhead lighting smoke hatch smoke and heat ventilator ventilated skylight roof access exhaust tower smoke vent smoke extraction device NSHEV public building IT 246 Industrial building natural smoke heat extraction storage warehouses cupola Hexadome Hexasteel Hexacoif Hexaonde rooflight winch co2 smoke extraction natural smoke extraction fire safety.
The remote control is to be placed at the bottom of the stairway from which smoke is to be extracted, and must be activated during the evacuation.
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