Passive fire protection design factors are accustomed to resist, retard and isolate flames as well as connected smoke and fumes: they don't in themselves extinguish flames consequently These are classed as 'passive protection'. We have been 100% assured within our services and products Which is the reason our fire alarms https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/