Description Intumescent block grilles provide 90% free ventilation space which seals completely in the event of a fire. This product contains non-clogging technology and consists of metal plats clad in intumescent and wrapped in foil with a wire-mesh front face. The intumescent material will expand to seal the grille in the event of a fire. Preventing the spread of fire and smoke in ducting and ventilation ducting, doors and walls. This product underwent a fire resistance test employing general procedures and criteria of BS476 Part 22 (1987). Achieved integrity of 240 minutes. Also tested under EN1366-3:2005 – 127 minutes and EN1363-1:2000, EN13501-2:2004 – 120 minutes. Advantages Dependent on the shape of the ventilation gap, block grilles are tailored to fit all shapes, including round, oblong and square. Where needed, the edges of grilles can be sealed with mastic and adhesives. Designed in sizes between 15mm to 38mm depth, with special orders made where required. 90% free ventilation space, suitable for installation in ventilation ducting. Non-clogging. Suitable for installation in ducting/ventilation ducting, doors and walls. For use in fire barrier walls, doors and duct openings. Provides an effective fire seal for up to 4 hours. Circular version can be made to order if required. Application Instructions The intumescent block grille simply gets pushed into place. Mastic or silicone sealant can be used around the edges if required. Please note: these grilles can be made with lugs to screw into place for ceiling applications if required. Any type of grille front can be used or Envirograf front plates can be supplied. Order References / Size REF mm xmm 100 125 150 175 200 225 250 275 300100 125 150 175 200 225 250275 300 Data Sheets Technical Data Sheets TD036-10-2018 Application Data Sheets AP036-10-2018 Health & Safety Data Sheets HS036-10-2018
