Roof Smoke and Heat Exhaust Ventilation System
smoke and heat extractor

roof Smoke and Heat Exhaust Ventilation System
roof Smoke and Heat Exhaust Ventilation System
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for roof, smoke and heat extractor


The position of roof skylights is ideal for an effective natural exhaust of smoke and heat in the event of fire. The skylights, equipped with a natural smoke and heat exhaust system (NSHEV), are one of the essential elements to ensure safety in the event of fire. Designers or investors can choose from two types of opening mechanisms for NSHEV; 24V/48V motors and pneumatic cylinders with CO2 cartridges & ampule. Skylights can be used under normal conditions for lighting and ventilation of the premises, and in the event of fire, they serve as a natural exhaust of smoke and heat from the burning premises. The following types of ALUX skylights are equipped with NSHEV systems: - Skydomes, - Alux segmented light band, - Alux polycarbonate arch band The ALUX NSHEV systems correspond to or are certified in accordance with EU law (standard EN 12101:2). In accordance with EN 12101:2, tests are done to check the opening angle of the skylight, opening time, opening under load (SL), reliability of operation (RE), operation at low temperatures (T(0)), temperature stability (B), wind load (WL), and reaction of the material to fire. A special test in the windpipe determines the emission coefficients (Cv), which define the aerodynamic surfaces (Aa) of the individual dimensions.


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