Provides up to 120 minutes fire resistance for ventilated openings
An intumescent matrix supported in a steel frame. Under normal conditions, air is free to pass through in either direction with a free area of approximately 80%.
Anti-vermin mesh is incorporated as standard.
In a fire, the matrix is sealed by the expansion of the fibre/graphite composition.
Decorative grilles can be provided to special order.
- Approx. free area 80%
- Moisture and vermin resistant