{"product_id":"black-combi-ducting-5-metre-length","title":"Vortex Black Combi-Ducting - 5 Metre Length","description":"```html\n\u003csection class=\"gh-product-listing\"\u003e\n\n\u003ch2\u003eVortex Black Combi-Ducting – 5 Metre Flexible Ventilation Duct\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eBest for:\u003c\/strong\u003e Growers who want tear-resistant, light-proof ducting without paying premium acoustic prices\u003c\/p\u003e\n\n\u003cdiv class=\"gh-our-thoughts\" role=\"note\" aria-label=\"Our thoughts\"\u003e\n\u003cp\u003e\u003cem\u003e\u003cstrong\u003eOur thoughts\u003c\/strong\u003e\u003cbr\u003e\nCombi-ducting punches well above its price point. The double-layer construction genuinely makes a difference — it holds its shape better than single-skin aluminium, resists tearing when you're wrestling it around corners, and the black outer stops light leaks dead. We bought heavy on this one, so you benefit from the clearance pricing.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eVortex Black Combi-Ducting is a \u003cstrong\u003edouble-layer flexible ventilation duct\u003c\/strong\u003e that combines durability, light-proofing, and ease of installation in one straightforward package. The aluminium and polyester inner shell is supported by a steel wire helix and wrapped in a black PVC outer layer — giving you strength and airtightness without the premium markup of acoustic ducting.\u003c\/p\u003e\n\n\u003cp\u003eThis is the sensible middle ground between standard aluminium ducting (which tears easily) and expensive acoustic alternatives. It does the job properly, won't split when you're rerouting runs, and blocks light completely. At 5 metres, you've got enough length for most tent and room setups without needing multiple sections.\u003c\/p\u003e\n\n\u003ch3\u003eHow it compares\u003c\/h3\u003e\n\u003cp\u003eCombi-ducting sits in the \u003cstrong\u003esmart-value ventilation tier\u003c\/strong\u003e — better than standard, cheaper than acoustic.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Standard aluminium ducting:\u003c\/strong\u003e Significantly more tear-resistant; black outer prevents light leaks; roughly double the durability at a fraction of acoustic pricing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Acoustic\/ultra-silent ducting:\u003c\/strong\u003e Less noise reduction, but costs a third of the price; still quieter than single-layer aluminium\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003evs. Single-layer flexible ducting:\u003c\/strong\u003e Reinforced wire helix maintains cross-section better; holds shape under tension; genuine airtight seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eIn plain terms: you're getting proper ventilation ducting that won't tear itself apart after a few months of use.\u003c\/p\u003e\n\n\u003ch3\u003eUsage guidance\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eExtraction and intake\u003c\/strong\u003e\u003cbr\u003e\nCombi-ducting works cleanly for both pulling air out of your space and drawing fresh air in. Connect it directly over the flange of your extraction fan or filter using an appropriately sized duct clip. Make sure it's as fully extended as possible — stretched runs are quieter and more efficient than slack loops.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRouting and installation\u003c\/strong\u003e\u003cbr\u003e\nThis is where combi really shines. It concertinas down tightly if needed and bends around corners without creasing or losing its shape. If you need to cut it to length, use sharp scissors for the aluminium and wire cutters for the steel helix.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eTemperature range\u003c\/strong\u003e\u003cbr\u003e\nRated to 140°C, so it handles the heat from extraction fans without degrading. Not something you'll need to worry about in normal indoor growing setups.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMaintenance\u003c\/strong\u003e\u003cbr\u003e\nKeep it extended to stop dust collecting inside. Periodically check duct clips are tight — vibration can loosen them over time.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 5 metres (also available in 10-metre variant)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter options:\u003c\/strong\u003e 100mm to 315mm (4\" to 12.5\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Dual-layer — aluminium and polyester inner shell with steel wire helix reinforcement and black PVC outer sheath\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial properties:\u003c\/strong\u003e Fully airtight; light-proof; tear-resistant; maintains cross-sectional area under airflow pressure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature rating:\u003c\/strong\u003e Up to 140°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexibility:\u003c\/strong\u003e Concertinas to short lengths; bends around corners without kinking\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Fits directly over matching-diameter fan flanges; secures with standard duct clips\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho this is for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGrowers upgrading from standard aluminium ducting that keeps splitting\u003c\/li\u003e\n\u003cli\u003eBudget and mid-range setups where durability matters but acoustic ducting feels like overkill\u003c\/li\u003e\n\u003cli\u003eAnyone building a ventilation system for the first time who wants reliable kit without overcomplicating things\u003c\/li\u003e\n\u003cli\u003eGrowers using larger-diameter runs (where standard ducting sags and tears more easily)\u003c\/li\u003e\n\u003cli\u003eAnyone installing in light-sensitive spaces where ducting holes are a problem\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eOur take\u003c\/h3\u003e\n\u003cp\u003eThis is proper ventilation ducting that does exactly what it should — moves air efficiently, doesn't tear, blocks light, and holds up to repeated adjustments. It's not the quietest option on the market, but it's substantially cheaper than acoustic alternatives and miles better than the single-skin stuff.\u003c\/p\u003e\n\n\u003cp\u003eAt clearance pricing, well worth picking up while stock lasts. One of those basics you'll always need more of, and this version actually lasts.\u003c\/p\u003e\n\n\u003c\/section\u003e\n```","brand":"VORTEX","offers":[{"title":"4\"","offer_id":47916626444458,"sku":"85048","price":7.99,"currency_code":"GBP","in_stock":true},{"title":"5\"","offer_id":47916626477226,"sku":"85036","price":11.49,"currency_code":"GBP","in_stock":true},{"title":"6\"","offer_id":47916626509994,"sku":"85037","price":13.99,"currency_code":"GBP","in_stock":true},{"title":"8\"","offer_id":47916626542762,"sku":"85038","price":16.99,"currency_code":"GBP","in_stock":true},{"title":"10\"","offer_id":47916626575530,"sku":"85039","price":21.49,"currency_code":"GBP","in_stock":true},{"title":"12\"","offer_id":47916626608298,"sku":"85040","price":20.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0053\/5540\/5400\/files\/main_7_2_986b8c8f-3544-4443-ad35-29997f821cd8.jpg?v=1769197617","url":"https:\/\/growershouse.co.uk\/products\/black-combi-ducting-5-metre-length","provider":"Growers House ","version":"1.0","type":"link"}