Intumescent Fire Dampers (IFDs)
are designed to seal penetrations provided for movement of air via ducted or naturally ventilated means. Unlike mechanical dampers where the heat from a fire causes a fuseable link to break in the damper, the operation of the IFDs is by heat activation of the intumescent material. The intumescent swells many times its original thickness to form a solid barrier to fire.
Available in rectangular as well as round configurations, the fire dampers are suitable for incorporating into wall, floor and ceiling penetrations, as well as ducting.
Range of models with varying integrity fire ratings up to 4 hours.
No moving parts.