CEN/TR 12101-5:2005

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and units
  3.1 Terms and definitions
  3.2 Symbols and units
4 General recommendations
  4.1 Design objectives
  4.2 Reliability
  4.3 Combined use of natural and powered ventilators
  4.4 Sequence of operation of devices comprising a single SHEVS
  4.5 Interactions between different smoke zones in a building
  4.6 Sprinkler protection
  4.7 Documentation
  4.8 Installation, maintenance and safety
5 Calculation procedures
  5.1 General
  5.2 Design regions
  5.3 Additional steps in the calculation
  5.4 Compatibility
6 Performance recommendations
  6.1 The fire as a basis for design
  6.2 Plumes rising directly from the fire into a smoke reservoir
  6.3 The flow of hot smoky gases out of a fire-room into an
       adjacent space
  6.4 The flow of hot smoky gases under a canopy projecting
       beyond a fire-room's window or opening
  6.5 The spill plume
  6.6 The smoke reservoir and ventilators
  6.7 External influences
  6.8 Inlet air (replacement air)
  6.9 Free-hanging smoke barriers
  6.10 Suspended ceilings
  6.11 Atrium depressurization
7 Interaction with other fire protection systems and other
  building systems
  7.1 Sprinklers
  7.2 Smoke and fire detection systems
  7.3 Pressure differential systems
  7.4 Public address and voice alarm systems
  7.5 Lighting and signage
  7.6 Computerized control systems
  7.7 Heating, ventilation and air-conditioning (HVAC)
  7.8 Security systems
Annex A (informative) Default value heat release rates
Annex B (informative) The plume rising directly from the fire
        into a smoke reservoir
Annex C (informative) The flow of hot smoky gases out of a
        fire-room into an adjacent space
Annex D (informative) The flow of hot smoky gases under a
        soffit projecting beyond a fire-room's opening or window
Annex E (informative) The spill plume
Annex F (informative) The smoke reservoir and ventilators
Annex G (informative) The influence of zones of overpressure
        and/or zones of suction upon a SHEVS
Annex H (informative) Deflection of free-hanging smoke barriers
Annex I (informative) Plenum chamber
Annex J (informative) Atrium depressurization
Annex K (informative) The interaction of sprinklers, a SHEVS
        and fire-fighting actions
Annex L (informative) The effect of a buoyant layer on the
        minimum pressure recommended for a pressure
        differential system
Bibliography

This Technical Report gives recommendations and guidance on functional and calculation methods for smoke and heat exhaust ventilation systems for steady-state design fires. It is intended for a variety of building types and applications, including single-storey buildings, mezzanine floors, warehouses with palletized or racked storage, shopping malls, atria and complex buildings, car parks, places of entertainment and public assembly and un-compartmented space within multi-storey buildings.This Technical Report does not include any functional recommendations for design parameters where the primary purpose of the SHEVS is to assist fire-fighting.NOTESuch functional recommendations need to be agreed with the fire service responsible for the building in question. The calculation procedures set out in the annexes of this Technical Report can be used to design the SHEVS to meet whatever recommendations have been agreed.This Technical Report does not cover the following:-smoke clearance, where smoke is exhausted from a building after the fire has been suppressed;-cross-ventilation, where wind-induced or fan-induced air currents sweep smoke through and out of the building, usually as part of fire-fighting operational procedures;-ventilation of stairwells, which usually represents a special application of smoke clearance and which does not necessarily protect the continued use of the stairwell;-fully-involved fires.