{"product_id":"mountain-air-carbon-filter","title":"Mountain Air Carbon Filter – For Grow Rooms and Tents","description":"\u003ch2\u003eOdour-Free Extraction from a Long-Life Activated Carbon Filter\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eMountain Air Carbon Filter\u003c\/strong\u003e scrubs smell out of the air your extractor fan pulls from a \u003cstrong\u003egrow tent or grow room\u003c\/strong\u003e. Exhaust air is drawn through a bed of \u003cstrong\u003eactivated carbon\u003c\/strong\u003e packed inside a perforated metal body, and odour molecules are trapped by \u003cstrong\u003eadsorption\u003c\/strong\u003e: they cling to the carbon's vast internal surface rather than soaking into it, so the carbon does not swell or clog the way a dust filter does. Mountain Air use a \u003cstrong\u003elow-density, high-strength carbon\u003c\/strong\u003e that keeps resistance low, so the fan keeps moving air while the filter does its job. Each size is rated for a set airflow and named by its flange and length, which makes pairing it with the right \u003cstrong\u003einline fan\u003c\/strong\u003e and ducting straightforward.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProper odour control\u003c\/strong\u003e – activated carbon adsorbs smell from the exhaust air before it leaves the room.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow resistance, strong airflow\u003c\/strong\u003e – low-density carbon lets the fan breathe, from \u003cstrong\u003e575 m³\/h\u003c\/strong\u003e on the compact 0620 up to \u003cstrong\u003e4500 m³\/h\u003c\/strong\u003e on the 1240XL.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLater breakthrough\u003c\/strong\u003e – Mountain Air's carbon holds on to odour molecules for longer, so the exhaust stays clean for longer before a new filter is due.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize-coded models\u003c\/strong\u003e – the model number gives the flange and length in inches, so the \u003cstrong\u003e0820\u003c\/strong\u003e is an 8-inch filter about 20 inches (500mm) long.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eL and XL high-capacity versions\u003c\/strong\u003e – the \u003cstrong\u003e1240L\u003c\/strong\u003e and \u003cstrong\u003e1240XL\u003c\/strong\u003e keep the 315mm flange and 1000mm length but use a wider body holding more carbon, rated \u003cstrong\u003e3500\u003c\/strong\u003e and \u003cstrong\u003e4500 m³\/h\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLittle to maintain\u003c\/strong\u003e – no moving parts and nothing to refill; hang it, duct it and let it work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard duct fit\u003c\/strong\u003e – a metal flange sized to standard metric ducting and clamps.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOdour Escaping With the Exhaust Air\u003c\/h3\u003e\u003cp\u003eEvery extraction system sends the room's air somewhere, and with it goes the smell of flowering plants, organic feeds, compost teas and damp growing media. A carbon filter only works if it can catch odour as fast as it arrives: an undersized or worn-out filter lets smell slip through, while one that chokes the fan cuts \u003cstrong\u003eairflow\u003c\/strong\u003e, so heat and \u003cstrong\u003ehumidity\u003c\/strong\u003e build up around the plants and mould gets a foothold. Matching a quality filter to your fan keeps the exhaust clean without strangling the ventilation your grow room climate depends on.\u003c\/p\u003e\u003ch3\u003eHow to Use\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChoose the size:\u003c\/strong\u003e match the flange to your fan and ducting, then pick a filter rated for at least the airflow your fan actually moves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount it high:\u003c\/strong\u003e warm, smelly air gathers near the roof, so hang the filter in the top of the tent or room, or stand it on a filter stand.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePull air through it:\u003c\/strong\u003e connect the flange to the fan's inlet so the fan draws air through the carbon. Mountain Air's selection guide covers mixed-flow and centrifugal inline fans.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeal every joint:\u003c\/strong\u003e clamp the ducting to the flange so no air can bypass the carbon.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeep humidity in check:\u003c\/strong\u003e very damp air shortens carbon life, so run the extraction hard enough to hold your target humidity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplace when it is spent:\u003c\/strong\u003e once smell starts reaching the exhaust, the carbon is saturated and the filter is due for replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"hcs-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlange:\u003c\/strong\u003e 150mm, 200mm, 250mm or 315mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAirflow:\u003c\/strong\u003e 575–4,500 m³\/h\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 500mm, 800mm or 1000mm, by model\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Mountain Air\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Activated carbon inline filter for extraction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFiltration:\u003c\/strong\u003e Adsorption by low-density, high-strength activated carbon\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody:\u003c\/strong\u003e Perforated metal cylinder with a single flanged outlet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel code:\u003c\/strong\u003e Flange diameter, then length, in inches; an L or XL suffix marks the wider high-capacity body\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0620:\u003c\/strong\u003e 150mm (6\") flange × 500mm long – rated 575 m³\/h, about 9kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0820:\u003c\/strong\u003e 200mm (8\") flange × 500mm long – rated 740 m³\/h, about 11kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0840:\u003c\/strong\u003e 200mm (8\") flange × 1000mm long – rated 1615 m³\/h, about 22kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1030:\u003c\/strong\u003e 250mm (10\") flange × 800mm long – rated 1870 m³\/h, about 19.5kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1040:\u003c\/strong\u003e 250mm (10\") flange × 1000mm long – rated 2380 m³\/h, about 26.2kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1230:\u003c\/strong\u003e 315mm (12\") flange × 800mm long – rated 2293 m³\/h, about 25kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1240:\u003c\/strong\u003e 315mm (12\") flange × 1000mm long, 415mm body – rated 2870 m³\/h, about 30.8kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1240L:\u003c\/strong\u003e 315mm (12\") flange × 1000mm long, 450mm body – rated 3500 m³\/h, about 38kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1240XL:\u003c\/strong\u003e 315mm (12\") flange × 1000mm long, 500mm body – rated 4500 m³\/h, about 43kg\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable fans:\u003c\/strong\u003e Mixed-flow and centrifugal inline fans of the same duct size\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum ambient humidity:\u003c\/strong\u003e 80% RH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse:\u003c\/strong\u003e Odour control on extraction from grow tents and grow rooms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cdiv class=\"hcs-faq\"\u003e\n\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eWhich size do I need?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eMatch the flange to your fan's duct size, then check the filter's rated airflow is at least what the fan delivers through your ducting. Mountain Air's own EC 1030 Air Kit, for example, pairs the 1030 (1870 m³\/h) with the 250mm EC Whisper fan (1808 m³\/h).\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eWhat do the model numbers mean?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eThe first two digits are the flange diameter in inches and the last two the approximate length in inches: 0620 is 6\" × 500mm, 0820 is 8\" × 500mm, 0840 is 8\" × 1000mm, 1030 is 10\" × 800mm, 1040 is 10\" × 1000mm, 1230 is 12\" × 800mm and 1240 is 12\" × 1000mm.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eWhat is the difference between the 1240, 1240L and 1240XL?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eAll three have a 315mm (12\") flange and a 1000mm body. The 1240's body is 415mm across and rated 2870 m³\/h; the 1240L widens it to 450mm for 3500 m³\/h and the 1240XL to 500mm for 4500 m³\/h. The wider body holds more carbon, so air passes through it more slowly. HydroGarden, Mountain Air's UK distributor, advises choosing a filter rated above what your extraction actually delivers, which keeps odour capture complete and the carbon working for longer – so the L or XL suits a powerful 315mm fan or a room where you want the longest life from the filter.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eWhich fans can I use with it?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eMountain Air's selection guide covers mixed-flow and centrifugal inline fans. Overlay the fan's pressure curve on the filter's pressure-drop curve and the crossing point gives the real airflow of the pair. Any make with the same duct size will fit, including Mountain Air's own EC Whisper fans.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #e6e6e6;border-radius:8px;padding:12px 16px;margin:0 0 8px;\"\u003e\u003csummary style=\"cursor:pointer;font-weight:600;\"\u003eHow long will the carbon last?\u003c\/summary\u003e\u003cp style=\"margin:10px 0 0;\"\u003eThat depends on hours run, humidity and how much odour the room produces. Mountain Air's carbon holds odour molecules for longer than typical budget carbon, so breakthrough comes later; when smell starts to reach the exhaust, fit a new filter.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003ch3\u003eWorks Well With\u003c\/h3\u003e\u003cdiv class=\"hcs-related\" style=\"display:flex;flex-wrap:wrap;gap:10px;margin:12px 0 0;\"\u003e\n\u003ca href=\"\/products\/mountain-air-ec-whisper-fan-315mm\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/mountain-air-ec-whisper-fan-315mm-default-title-1.jpg?v=1790229769\u0026amp;width=160\" alt=\"Mountain Air EC Whisper Fan\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eMountain Air EC Whisper Fan\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eMountain Air's own silenced EC fan, 150, 250 and 315mm\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/ram-filter-stand\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/carbon-filters-ram-filter-stand-29228134924472.jpg?v=1785315614\u0026amp;width=160\" alt=\"RAM Carbon Filter Stand\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eRAM Carbon Filter Stand\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eFree-standing support, 120–240cm high\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/black-combi-ducting\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/ducting-combi-ducting-29227386208440.webp?v=1773486972\u0026amp;width=160\" alt=\"G.A.S Black Combi Ducting\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003eG.A.S Black Combi Ducting\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eLight-proof ducting from the filter to the fan\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\u003ca href=\"\/products\/fast-clamps-4-12\" style=\"flex:1 1 240px;display:flex;align-items:center;gap:12px;padding:10px 12px;border:1px solid #e6e6e6;border-radius:8px;text-decoration:none;color:inherit;background:#fff;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/Fast-clamps-group-medium_landscape.jpg?v=1746904795\u0026amp;width=160\" alt=\"Padded Fast Clamps\" width=\"64\" height=\"64\" loading=\"lazy\" style=\"width:64px;height:64px;object-fit:contain;flex:none;\"\u003e\u003cspan style=\"font-size:14px;line-height:1.4;\"\u003e\u003cstrong style=\"display:block;\"\u003ePadded Fast Clamps\u003c\/strong\u003e\u003cspan style=\"color:#008d37;\"\u003eSeals the ducting to the filter flange\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/div\u003e","brand":"Mountain Air","offers":[{"title":"6\" 150x500 - 575m3\/hr (0620)","offer_id":53930886267146,"sku":"ENV-MOUN-002-01","price":108.95,"currency_code":"GBP","in_stock":true},{"title":"8\" 200x500 - 740m3\/hr (0820)","offer_id":53930886299914,"sku":"ENV-MOUN-002-02","price":118.95,"currency_code":"GBP","in_stock":true},{"title":"8\" 200x1000 - 1615m3\/hr (0840)","offer_id":53930886332682,"sku":"ENV-MOUN-002-03","price":188.95,"currency_code":"GBP","in_stock":false},{"title":"10\" 250x800 - 1870m3\/hr (1030)","offer_id":53930886365450,"sku":"ENV-MOUN-002-04","price":198.95,"currency_code":"GBP","in_stock":true},{"title":"10\" 250x1000 - 2380m3\/hr (1040)","offer_id":53930886398218,"sku":"ENV-MOUN-002-05","price":237.99,"currency_code":"GBP","in_stock":true},{"title":"12\" 315x800 - 2293m3\/hr (1230)","offer_id":53930886430986,"sku":"ENV-MOUN-002-06","price":238.95,"currency_code":"GBP","in_stock":true},{"title":"12\" 315x1000 - 2870m3\/hr (1240)","offer_id":53930886463754,"sku":"ENV-MOUN-002-07","price":268.95,"currency_code":"GBP","in_stock":true},{"title":"12\" 315x1000 - 3500m3\/hr (1240L)","offer_id":53930886496522,"sku":"ENV-MOUN-002-08","price":279.95,"currency_code":"GBP","in_stock":true},{"title":"12\" 315x1000 - 4500m3\/hr (1240XL)","offer_id":53930886529290,"sku":"ENV-MOUN-002-09","price":294.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/7127\/5786\/files\/mountain-air-carbon-filter-8-200x500-740m3-hr-0820-1.jpg?v=1792278741","url":"https:\/\/hydrocropshop.co.uk\/products\/mountain-air-carbon-filter","provider":"Hydro Crop Shop","version":"1.0","type":"link"}