Passive fire protection building components are used to resist, retard and isolate flames plus the associated smoke and fumes: they do not in by themselves extinguish flames hence They can be classed as 'passive security'. Down below, we’ll protect every one of the ins and outs of wireless fire alarm https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/