{"product_id":"gb-silent-max-fan-v2","title":"GB Silent-Max Fan V2 – Silent Inline Fan for Grow Rooms","description":"\u003ch2\u003eHigh airflow from a big inline fan that keeps the noise down\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eGB Silent-Max Fan V2\u003c\/strong\u003e from Greenbox is a \u003cstrong\u003esilenced inline extractor fan\u003c\/strong\u003e for grow rooms and large tents. The motor and impeller sit inside an insulated outer casing lined with a \u003cstrong\u003ethick layer of acoustic foam\u003c\/strong\u003e, which soaks up motor hum and air noise before it reaches the room. A \u003cstrong\u003ebuilt-in twin speed controller\u003c\/strong\u003e lets you run it on \u003cstrong\u003elow\u003c\/strong\u003e for quiet background extraction or \u003cstrong\u003ehigh\u003c\/strong\u003e when temperatures climb, with up to \u003cstrong\u003e3000 m³\/h\u003c\/strong\u003e from the 250mm model and \u003cstrong\u003e3100 m³\/h\u003c\/strong\u003e from the 315mm.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerious airflow\u003c\/strong\u003e – \u003cstrong\u003e3000 m³\/h\u003c\/strong\u003e (250mm) or \u003cstrong\u003e3100 m³\/h\u003c\/strong\u003e (315mm) on high speed, \u003cstrong\u003e2000–2050 m³\/h\u003c\/strong\u003e on low.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuiet running\u003c\/strong\u003e – a foam-lined acoustic casing keeps noise down in shared or residential spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwin speed built in\u003c\/strong\u003e – a Low\/High dial on the unit; no separate controller needed for basic use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy to hang\u003c\/strong\u003e – lifting eyes on the casing for straps or chains.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eHeat, Humidity and Noise\u003c\/h3\u003e\u003cp\u003eBig rooms and high-wattage lighting need a lot of air changes to hold temperature and humidity, and an undersized or noisy fan forces a compromise between plant health and peace and quiet. Poor extraction leaves stale, humid air sitting in the canopy, which slows growth and invites mould and mildew. A large silenced fan moves the volume the room needs while keeping the sound to a low hum.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMatch the fan to your ducting and carbon filter: \u003cstrong\u003e250mm (10\")\u003c\/strong\u003e or \u003cstrong\u003e315mm (12\")\u003c\/strong\u003e spigots.\u003c\/li\u003e\n\u003cli\u003eHang it from the lifting eyes with straps or chains to reduce vibration, and keep duct runs short with gentle bends.\u003c\/li\u003e\n\u003cli\u003ePull air through the carbon filter (filter on the inlet side) for odour control.\u003c\/li\u003e\n\u003cli\u003eUse \u003cstrong\u003eLow\u003c\/strong\u003e for lights-off or quiet periods and \u003cstrong\u003eHigh\u003c\/strong\u003e when heat builds; add a fan speed or climate controller for automatic control.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cdiv class=\"hcs-specs\"\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e GB Silent-Max (Greenbox)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSizes:\u003c\/strong\u003e 10\" \/ 250mm, 12\" \/ 315mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAirflow, high speed:\u003c\/strong\u003e 3000 m³\/h (250mm), 3100 m³\/h (315mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAirflow, low speed:\u003c\/strong\u003e 2000 m³\/h (250mm), 2050 m³\/h (315mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFan speed:\u003c\/strong\u003e 2750 rpm high, 1800 rpm low\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 320W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent:\u003c\/strong\u003e 1.2A (250mm), 1.3A (315mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStatic pressure:\u003c\/strong\u003e 20Pa\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eController:\u003c\/strong\u003e built-in, Low\/High\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCable length:\u003c\/strong\u003e 1.5m\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 35.5 x 35.5 x 68.5cm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 17kg\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"GB","offers":[{"title":"10\" - 3000m3\/h","offer_id":53803800035594,"sku":"ENV-GBX-001-01","price":321.95,"currency_code":"GBP","in_stock":true},{"title":"12\" - 3100m3\/h","offer_id":53803800068362,"sku":"ENV-SILE-001-01","price":342.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/gb-silent-max-fan-v2-1.jpg?v=1790229509","url":"https:\/\/hydrocropshop.co.uk\/products\/gb-silent-max-fan-v2","provider":"Hydro Crop Shop","version":"1.0","type":"link"}