{"product_id":"ac-infinity-backdraft-damper-ducting-insert-4-inch-black-galvanized-steel","title":"AC Infinity 4-Inch Backdraft Damper Duct Insert","description":"\u003cp\u003eThe \u003cstrong\u003eAC Infinity AC-BDD4-B\u003c\/strong\u003e fits inside 4-inch rigid or flexible ducting and opens under low air pressure from an inline fan or extractor. When airflow stops, its spring-assisted aluminium butterfly blades close automatically to help prevent backflow.\u003c\/p\u003e\n\u003cp\u003eTwo outer rubber gasket rings create a secure friction seal against the inside of the duct. This keeps the damper firmly positioned in horizontal or vertical installations without requiring additional fasteners.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne-way airflow control:\u003c\/strong\u003e Helps block cold outdoor air, odours, pests, wind and unfiltered air from travelling back through the duct.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-resistance butterfly blades:\u003c\/strong\u003e Lightweight aluminium shutters open with minimal fan pressure to help maintain airflow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic closure:\u003c\/strong\u003e Spring-assisted blades close when positive airflow stops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual rubber gasket rings:\u003c\/strong\u003e Create a tight friction seal around the housing and help prevent air leakage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable steel chassis:\u003c\/strong\u003e Powder-coated galvanised steel offers resistance to moisture and elevated HVAC temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible installation:\u003c\/strong\u003e Suitable for horizontal or vertical mounting inside compatible ducting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eTechnical parameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand \/ manufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAC Infinity Inc.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct name\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBackdraft Damper, 4-Inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAC-BDD4-B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUPC barcode\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e819137021303\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible duct opening size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 in (10.2 cm) diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverall product length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5.03 in (12.8 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChassis material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePowder-coated galvanised steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShutter blade material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLightweight aluminium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSealing gaskets\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDual outer rubber friction rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColour and finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMatte black powder coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting orientation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHorizontal or vertical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSuitable Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKitchen and bathroom extraction:\u003c\/strong\u003e Helps prevent outdoor draughts and odours entering through range hood, bathroom fan and tumble dryer vents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndoor cultivation ventilation:\u003c\/strong\u003e Helps maintain sealed grow-room conditions when fans are idle and reduces unfiltered air intrusion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHVAC and appliance venting:\u003c\/strong\u003e Helps limit downdraughts in compatible residential ventilation and exhaust systems.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LED GROW SHOP UK","offers":[{"title":"Default Title","offer_id":58452932002123,"sku":"AC-BDD4-B","price":17.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1034\/8101\/6651\/files\/StorePhoto1__81287.jpg?v=1789212154","url":"https:\/\/florifi.co.uk\/products\/ac-infinity-backdraft-damper-ducting-insert-4-inch-black-galvanized-steel","provider":"Florifi","version":"1.0","type":"link"}