Smoke & fire protection


The challenges of smoke control in existing multi- occupancy buildings


Whitesales explores the ventilation solutions for smoke control and management in multi-occupancy buildings


W


ith 53 per cent of fire-related fatalities resulting from individuals being overcome by smoke or toxic fumes, smoke heat exhaust vent systems (SHEVs) make a critical difference by helping to keep


escape routes smoke-free. In multi-occupancy buildings in particular they enable firefighters to tackle blazes more safely and effectively and can, therefore, make a significant contribution to reducing structural damage. British Standard guidance varies according to building height and the


distance from the furthest apartment entrance door to its nearest escape route. However, life-saving devices and systems should, ideally, exceed standards and achieve strictly defined performance criteria. Thorough analysis of the proposed fire strategy and design of common escape routes is therefore essential. Performance criteria and SHEV system design will depend on the layout of


corridors and communal areas. As such, a mechanical smoke extraction system can give greater flexibility in terms of floor space utilisation. Indeed, in addition


Performance criteria and SHEV system design will depend on the layout of corridors and communal areas. As such, a mechanical smoke extraction system can give greater flexibility in terms of floor space utilisation


to providing greater efficiency than a natural ventilation system it can effectively be designed around space constraints. The need for a secondary power supply may increase initial outlay but this must be set against greater efficiency, design


www.housingmmonline.co.uk | HMM November 2018 | 47


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