Passive fire security building components are accustomed to resist, retard and isolate flames along with the linked smoke and fumes: they do not in on their own extinguish flames consequently They are really classed as 'passive defense'. Environmental Constraints: Harsh temperatures, large humidity, or corrosive environments might effect the lifestyle https://tvsocialnews.com/story6033976/ems-firecell-wireless-fire-alarm-things-to-know-before-you-buy