{"product_id":"back-draft-damper-300mm","title":"BACK DRAFT DAMPER 300MM","description":"\u003cp\u003eThis 300mm Back Draft Damper is designed to automatically close off ducting when your extraction fan stops, helping reduce unwanted backflow through your ventilation line. It’s a straightforward add-on for larger ventilation runs where keeping airflow moving one way improves control.\u003c\/p\u003e\n\n\u003ch3\u003eWhy you’ll like it\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHelps prevent reverse airflow when fans are switched off (as stated)\u003c\/li\u003e\n  \u003cli\u003eAutomatically shuts to reduce drafts and backflow through ducting\u003c\/li\u003e\n  \u003cli\u003eSupports more stable ventilation performance in larger duct runs\u003c\/li\u003e\n  \u003cli\u003eSimple inline fitment with standard ducting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBest for\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eLarge grow rooms and spaces using 300mm ducting\u003c\/li\u003e\n  \u003cli\u003eVentilation systems that cycle fans on\/off (timers or controllers)\u003c\/li\u003e\n  \u003cli\u003eReducing backflow that can affect temperature\/humidity stability (general guidance)\u003c\/li\u003e\n  \u003cli\u003eHVAC-style ducting where one-way airflow control is useful\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003cp\u003eInstall inline with 300mm ducting in the correct airflow direction, then secure with clamps or tape as needed. Make sure the damper can open and close freely without obstruction.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInstall in the correct direction of airflow (general guidance)\u003c\/li\u003e\n  \u003cli\u003eSupport ducting so the damper isn’t under strain\u003c\/li\u003e\n  \u003cli\u003eCheck operation after install (opens with fan on, closes when off)\u003c\/li\u003e\n  \u003cli\u003eInspect periodically and clean dust build-up if needed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eHydro \/ Coco \/ Soil: Not applicable\u003c\/li\u003e\n  \u003cli\u003eSystems: 300mm ducting and inline fan ventilation systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Back Draft Damper 300mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAvailable in multiple sizes (100mm, 125mm, 150mm, 200mm, 250mm, 300mm as listed)\u003c\/li\u003e\n  \u003cli\u003ePlease note: backdraft dampers are non-returnable (as stated)\u003c\/li\u003e\n  \u003cli\u003eEnsure diameter matches your ducting for best seal and airflow\u003c\/li\u003e\n  \u003cli\u003eKeep away from sharp bends immediately before\/after the damper where possible (general guidance)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Hydro Depot","offers":[{"title":"Default Title","offer_id":51713495007543,"sku":"FANBAC300","price":89.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/3466\/5271\/files\/49a872f3-back-draft-damper__96278.jpg?v=1771910646","url":"https:\/\/hydrodepot.com.au\/products\/back-draft-damper-300mm","provider":"HYDRO DEPOT","version":"1.0","type":"link"}