cen:proj:81168

CEN/TS 12101-12 Functional recommendations and calculations methods for SHEVS employing time-dependent approach cen:proj:81168

Scope

Recommendations and guidance on design and sizing of smoke heat exhaust ventilation systems (SHEVS) for time-dependant fires.
Intended for a variety of building types and occupancies, including single-storey buildings, mezzanine floors, shopping malls, atria, complex buildings, public assembly, and un-compartmented space extending through several floors.
Design criteria to meet one or more of the following design objectives:
- To improve the tenability conditions for occupants.
- To improve the tenability conditions for fire-fighters.
- To limit damages to the building, damages to its content and impact on the business continuity.
Not covered:
- smoke control systems using cross-ventilation (where air displacement is fan-induced to avoid upstream smoke propagation, usually as part of fire-fighting operations);
- pressure differential systems (where protected space is pressurised or unprotected space is depressurised);
- natural ventilation of staircases;
- fully involved fires (post flash-over situation);
- rooms where the height is insufficient to create a smoke free area under the smoke layer.