{"product_id":"ona-air-filter","title":"ONA Air Filter – In-Line Duct Odour Neutraliser 4\" to 12\"","description":"\u003cp\u003e\u003cstrong\u003eMost odour control asks you to fight a smell where it ends up. The ONA Air Filter fights it where it's going.\u003c\/strong\u003e Every bit of air leaving your tent or room already passes through one place: the ducting. Put the odour neutraliser there and nothing gets out without meeting it first. One small box in the line turns your whole ventilation run into an odour-control system.\u003c\/p\u003e\n\n\u003cp\u003eThe ONA Air Filter is a stainless duct section with a clip-shut hatch. Cut it into your outgoing ducting, pop the hatch, drop in an ONA Block, and close it. As air rushes past, it picks up ONA's natural essential-oil formula, which bonds with odour molecules and neutralises them rather than just covering them with perfume. It's available in all six duct sizes, 4\" to 12\".\u003c\/p\u003e\n\n\u003ch3\u003eWhy use one\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTreats every cubic metre that leaves.\u003c\/strong\u003e Air can't go round it, because it is the duct.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo power, no filters to change.\u003c\/strong\u003e Just swap the ONA Block when it's used up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with or without a carbon filter.\u003c\/strong\u003e On its own it handles light odours. After a carbon filter it's a belt-and-braces backup that catches anything the carbon misses, which is especially useful as a carbon filter nears the end of its life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoom for more in bigger sizes.\u003c\/strong\u003e The 8\", 10\" and 12\" have space for more than one block when you need extra strength.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to fit it\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eChoose the ONA Air Filter that matches your ducting size.\u003c\/li\u003e\n\u003cli\u003eCut it into the outgoing (exhaust) ducting run, ideally after your fan and carbon filter.\u003c\/li\u003e\n\u003cli\u003eSecure both ends with ducting clips or jubilee clips and seal them with aluminium tape.\u003c\/li\u003e\n\u003cli\u003eOpen the hatch, drop in an ONA Block (lid off), and clip it shut.\u003c\/li\u003e\n\u003cli\u003eWhen the block has shrunk away, swap in a fresh one.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eONA Blocks are sold separately.\u003c\/strong\u003e You'll find them in our ONA range, in several fragrances.\u003c\/p\u003e\n\n\u003ch3\u003eNot just for growers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGrow tents and drying rooms\u003c\/li\u003e\n\u003cli\u003eKitchen, bathroom and utility-room extract ducting\u003c\/li\u003e\n\u003cli\u003eWorkshops, garages and pet rooms with extraction\u003c\/li\u003e\n\u003cli\u003eSmoking areas with an extractor fan\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRose's Pro-Tip\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003e\"Put it after the carbon, not instead of it. A carbon filter does the heavy lifting and the ONA box mops up whatever slips through. That pairing also buys you time: when the carbon starts tiring, the ONA covers the gap until you replace it, so there's never a day when the smell gets out.\"\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eSizes\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eDuct\u003c\/th\u003e\n\u003cth\u003eONA Blocks\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e4\"\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100mm\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e5\"\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e125mm\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e6\"\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e150mm\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e8\"\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200mm\u003c\/td\u003e\n\u003ctd\u003e1 or more\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e10\"\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e250mm\u003c\/td\u003e\n\u003ctd\u003e1 or more\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e12\"\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e315mm\u003c\/td\u003e\n\u003ctd\u003e1 or more\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a carbon filter?\u003c\/strong\u003e\u003cbr\u003eNo. It's a duct housing that holds ONA Blocks, which neutralise odour chemically as air passes. For heavy odours, use it alongside a carbon filter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the block come with it?\u003c\/strong\u003e\u003cbr\u003eNo, ONA Blocks are sold separately so you can choose your fragrance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it slow my fan down?\u003c\/strong\u003e\u003cbr\u003eVery little. It's a straight duct section, so air flows through it much as it would through normal ducting.\u003c\/p\u003e","brand":"Ona","offers":[{"title":"4\" (100mm)","offer_id":55089802740058,"sku":"BFH-ONAAIRFILTER4","price":24.99,"currency_code":"GBP","in_stock":true},{"title":"5\" (125mm)","offer_id":55089802772826,"sku":"BFH-ONAAIRFILTER5","price":26.99,"currency_code":"GBP","in_stock":true},{"title":"6\" (150mm)","offer_id":55089802805594,"sku":"BFH-ONAAIRFILTER6","price":29.99,"currency_code":"GBP","in_stock":true},{"title":"8\" (200mm)","offer_id":55089802838362,"sku":"BFH-ONAAIRFILTER8","price":36.99,"currency_code":"GBP","in_stock":true},{"title":"10\" (250mm)","offer_id":55089802871130,"sku":"BFH-ONAAIRFILTER10","price":39.99,"currency_code":"GBP","in_stock":true},{"title":"12\" (315mm)","offer_id":50265384091994,"sku":"BFH-ONAAIRFILTER12","price":42.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/9861\/4106\/files\/rQldZdBw.jpg?v=1793111848","url":"https:\/\/blackflaghorticulture.com\/products\/ona-air-filter","provider":"Black Flag Horticulture","version":"1.0","type":"link"}