Passive fire security building elements are used to resist, retard and isolate flames and also the linked smoke and fumes: they do not in on their own extinguish flames consequently These are classed as 'passive safety'. Indeed, by making use of a several loop FireCell panel it can be done https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/