{"product_id":"back-draft-damper-250mm","title":"BACK DRAFT DAMPER 250MM","description":"\u003cp\u003eThis 150mm 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 simple, practical addition for grow rooms, tents, and ventilation setups where maintaining one-way airflow matters.\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\u003eAutomatic close function supports more stable ventilation control\u003c\/li\u003e\n  \u003cli\u003eUseful for reducing drafts and unwanted air movement through ducting\u003c\/li\u003e\n  \u003cli\u003eSimple inline addition to standard duct runs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBest for\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eGrow tents\/rooms with inline extraction systems\u003c\/li\u003e\n  \u003cli\u003eVentilation lines where backflow causes odour leaks or climate drift (general guidance)\u003c\/li\u003e\n  \u003cli\u003eSystems that cycle fans on\/off (timers or controllers)\u003c\/li\u003e\n  \u003cli\u003eHVAC-style ducting setups needing one-way airflow control\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to use\u003c\/h3\u003e\n\u003cp\u003eInstall inline with 150mm ducting in the correct airflow direction, then secure with clamps or tape as needed. Ensure 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: Not applicable\u003c\/li\u003e\n  \u003cli\u003eCoco: Not applicable\u003c\/li\u003e\n  \u003cli\u003eSoil: Not applicable\u003c\/li\u003e\n  \u003cli\u003eSystems: 150mm 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 150mm\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":51713495040311,"sku":"FANBAC250","price":69.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0974\/3466\/5271\/files\/0510312c-back-draft-damper__47079.jpg?v=1771910648","url":"https:\/\/hydrodepot.com.au\/products\/back-draft-damper-250mm","provider":"HYDRO DEPOT","version":"1.0","type":"link"}