{"product_id":"intumescent-block-60mn-300x300","title":"Intumescent Block 60 Minute Pyrogrille Air Transfer Vent 300x300mm Black","description":"\u003cp\u003eA \u003cstrong\u003e60-minute intumescent block for the Pyrogrille 100 air transfer vent, measuring 300 x 300 x 25mm in black\u003c\/strong\u003e. The intumescent block expands under heat to seal the vent opening in the event of a fire, maintaining the fire integrity of the door or partition for up to 60 minutes while allowing normal air transfer during everyday use. Essential for fire-rated door installations where ventilation and fire compartmentation are both required.\u003c\/p\u003e\u003cp\u003eSupplied as a single block.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eType: Intumescent block, 60-minute fire rating\u003c\/li\u003e\n\u003cli\u003eCompatible with: Pyrogrille 100 Air Transfer Vent\u003c\/li\u003e\n\u003cli\u003eDimensions: 300 x 300 x 25mm\u003c\/li\u003e\n\u003cli\u003eColour: Black\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor the air transfer grilles themselves, see the \u003ca href=\"\/products\/int-air-transfer-grille-300x300\"\u003eIntumescent Air Transfer Grille 300x300mm\u003c\/a\u003e and the \u003ca href=\"\/products\/int-louvre-grille-300x300-slv\"\u003eIntumescent Louvre Grille 300x300mm Silver\u003c\/a\u003e. Browse the full \u003ca href=\"\/collections\/domus-ventilation\"\u003eventilation range\u003c\/a\u003e.\u003c\/p\u003e","brand":"NORSEAL LTD","offers":[{"title":"Default Title","offer_id":62803379519837,"sku":"DF799X3","price":48.56,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0968\/4100\/7453\/files\/DF799X3.jpg?v=1770777759","url":"https:\/\/www.blum.org.uk\/products\/intumescent-block-60mn-300x300","provider":"Hart Wholesale","version":"1.0","type":"link"}