Transfer grills. They must be placed into the wall to prevent fire to cross.
RCF4: The thickness of the grille (P) is 40 mm. Its resistance is EI60. If a conventional ventilation grille is placed in front of it then its EI120.
RCF5: The thickness of the grille (P) is 50 mm. Its resistance is EI90. If a conventional ventilation grille is placed in front of it then its EI120.
RCF6: The thickness of the grille (P) is 60 mm. Its resistance is EI120.
Fixing: MACRI