FOCUS Smoke ventilation
standards required would enable specifiers to ascertain that the specified solution is suitable under all variables.
Harnessing knowledge
Setting out clear technical performance standards for mechanical smoke extraction systems would make the process of comparing different designs during the early stages of a project, as well as the procedure for gaining local authority approval, much easier. After a decade of common use, a bank of
data exists to assist in designing such systems, especially for residential buildings where one lobby is very similar to another. At FläktGroup, we have data from many projects that details the changes to the system, such as supply and extract points in relation to the stair door, building characteristics, travel distances and fire size. We can compare this to the required smoke
extract rates from the fire floor to ensure smoke free escape routes. By aggregating all of this information into a database, we have developed suggested extract rates for buildings over 11m high with up to 20 storeys. If further information from previous designs supplied by other key players in the industry was available, along with local authority reports from approved projects throughout the years, a full body of evidence and knowledge could be produced to compile a set of technical standards and parameters. Altogether, this could form the basis to extend ADB.
36 MARCH 2019
www.frmjournal.com
Constant evolution
Industry regulations are constantly evolving, but compliance is essential to drive increased safety for building occupants. Some existing regulations, such as BS EN 12101-3: 2015: Smoke and heat control systems. Specification for powered smoke and heat control systems (Fans), are already in force. This standard details testing and assessment of smoke and heat extraction by powered systems. Tests include reliability, response times, resistance to fire, and effectiveness of smoke and hot gas extraction. FläktGroup is the first to announce a fully
certified packaged HT fan and VSD (variable speed drive) solution in the UK and Europe, delivering full compliance with this enhanced smoke and heat control systems standard. Moving forward, if statutory guidance is to reflect ‘innovations in the construction sector and the latest understanding of fire behaviour and protection’2
, it is vital that ADB
spells out objective performance standards for mechanical smoke extraction systems. Those involved in specifying such systems need
to understand precisely what they are assessing and buying into from the start, instead of relying on the supplier’s word. The government’s technical review of the legislative requirements opens up an unmissable opportunity to change this. After all, the design, specification and approval of modern mechanical smoke extraction systems need not be a dark art; it is time to bring it into the light
Simon Plummer is national fire safety manager at FläktGroup. For more information, view page 5
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