{"product_id":"hvc-silenced-inline-fan","title":"Silenced Inline Fan by HVC — Quiet EC Mixed Flow Extraction Fan, 150mm to 315mm","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eMost of the racket from a standard inline fan is the motor and the air rushing through a bare metal housing, and it carries straight into your ducting, walls and sleep. The HVC Silenced Inline Fan from Headwind builds an EC mixed flow fan and a silencer into one housing lined with noise-dampening insulation, so you get high-pressure extraction without the drone. Four sizes cover a single tent through to a commercial room: 150mm (594 m³\/h), 200mm (1,205 m³\/h), 250mm (1,808 m³\/h) and 315mm (2,987 m³\/h), each with a speed controller in the box. Measured 3m from the inlet, the 200mm runs at 37.7 dBA flat out. The honest bits: a silenced fan is long (550mm to 940mm), so measure your space first, and it is not made for rooms that sit above 90% humidity.\u003c\/p\u003e\n\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eQuiet, With Numbers to Prove It\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003e37.7 to 52.5 dBA at full speed, measured 3m from the inlet. The 150mm sits at 42.9 dBA, against 50.3 dBA for HVC's standard 150mm inline fan moving the same air.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eBuilt for Pressure\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003e500 to 677 Pa of static pressure across the range, so it keeps moving air through a carbon filter and longer duct runs instead of stalling.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eEC Motor, Smart Controller Ready\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eEvery size ships with a 0–100% variable speed controller, and it plugs into HVC smart controllers when you want fan speed to follow your room conditions on its own.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eMatched HVC Filters\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eHeadwind pairs each fan with an HVC carbon filter of the same size, from the 150 x 300mm up to the 315 x 1000mm. No guesswork, no reducers.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003e150mm to 315mm\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003e594 to 2,987 m³\/h across four sizes, from a single tent to a multi-tent room or commercial space.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003e12-Month Warranty, Parts in Australia\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eCovered for 12 months, and replacement controllers, cables and extension leads are held by the Australian distributor, so a damaged lead does not mean buying a whole new fan.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eSpecifications\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; font-size: 0.95rem; margin-bottom: 1.2rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Headwind HVC (Hydroponic Ventilation Control)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eFan type:\u003c\/strong\u003e EC mixed flow inline fan with built-in silencer\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSpeed control:\u003c\/strong\u003e 0–100% variable speed controller included\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSmart control:\u003c\/strong\u003e Works with HVC smart controllers (sold separately)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eIP rating:\u003c\/strong\u003e IPX4\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eElectrical approval:\u003c\/strong\u003e RCM compliant\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eFrequency:\u003c\/strong\u003e 50\/60Hz\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Mounting bracket, wall mount or hang\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eUse:\u003c\/strong\u003e Intake or exhaust, indoor use only\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eOperating range:\u003c\/strong\u003e -10°C to 60°C, below 90% humidity\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 12 months\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMade in:\u003c\/strong\u003e China, distributed in Australia by Holland Forge\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 0.88rem; min-width: 560px;\"\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left; padding: 8px 10px; border-bottom: 2px solid #2e5e2e; background: #f4f9f4;\"\u003e\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 8px 10px; border-bottom: 2px solid #2e5e2e; background: #f4f9f4;\"\u003e150mm\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 8px 10px; border-bottom: 2px solid #2e5e2e; background: #f4f9f4;\"\u003e200mm\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 8px 10px; border-bottom: 2px solid #2e5e2e; background: #f4f9f4;\"\u003e250mm\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 8px 10px; border-bottom: 2px solid #2e5e2e; background: #f4f9f4;\"\u003e315mm\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003eSE-A150J\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003eSE-A200J\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003eSE-A250J\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003eSE-A315J\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e\u003cstrong\u003eMax airflow\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e594 m³\/h (350 CFM)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e1,205 m³\/h (710 CFM)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e1,808 m³\/h (1,065 CFM)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e2,987 m³\/h (1,757 CFM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e\u003cstrong\u003eMax power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e40W\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e75W\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e150W\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e320W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e\u003cstrong\u003eMax speed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e5,000 RPM\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e3,800 RPM\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e3,200 RPM\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e3,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e\u003cstrong\u003eMax static pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e500 Pa\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e520 Pa\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e510 Pa\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e677 Pa\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e\u003cstrong\u003eMax noise (3m from inlet)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e42.9 dBA\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e37.7 dBA\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e43.5 dBA\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e52.5 dBA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e547mm\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e699mm\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e859mm\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e940mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e\u003cstrong\u003eBody diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e243mm\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e304mm\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e353mm\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e415mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e5kg\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e7.5kg\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e13kg\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px; border-bottom: 1px solid #edf3ed;\"\u003e21kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 10px;\"\u003e\u003cstrong\u003eMatched HVC filter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px;\"\u003e150 x 300mm\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px;\"\u003e200 x 750mm\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px;\"\u003e250 x 1000mm\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 10px;\"\u003e315 x 1000mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin: 0.8rem 0 0; font-size: 0.85rem; color: #555;\"\u003ePerformance figures are Headwind's laboratory data and can vary by around 10% in real installations.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eGrower's Tip\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 0;\"\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eSize up and run slower. A bigger fan turned down is quieter than a small fan flat out, and it leaves you headroom for the hot days.\u003c\/li\u003e\n\u003cli\u003ePut the carbon filter first and let the fan pull through it: filter, fan, then duct to the exhaust point.\u003c\/li\u003e\n\u003cli\u003eHang the fan on straps or rope hangers rather than bolting it hard to the tent frame or a wall, so vibration has nowhere to travel.\u003c\/li\u003e\n\u003cli\u003eOnce the fan is silenced, most of the noise left is the ducting. Pull flex duct fully tight, keep bends gentle, and use acoustic duct on the exhaust run if you want it quieter again.\u003c\/li\u003e\n\u003cli\u003eMatch your duct to the fan's size. Reducers add restriction and whistle, so skip them where you can.\u003c\/li\u003e\n\u003cli\u003ePut a pre-filter on any intake. Dust that builds up on the impeller throws it out of balance and shortens the fan's life.\u003c\/li\u003e\n\u003cli\u003eSeal every join with clamps and tape and aim for slight negative pressure, with the tent walls pulled in a little. That keeps odours inside.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eHow To Set It Up\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003eUnpack the fan and spin the impeller by hand to check it turns freely without touching the housing.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003ePlan the run: carbon filter, then the fan, then the shortest duct path to wherever you are exhausting. As an exhaust, mount it high in the opposite corner to your intake.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003eCheck the airflow arrow on the housing, then hang the fan or fix it with the supplied bracket so it pulls away from the filter.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003eConnect ducting to both ends, lock it on with duct clamps and seal each join with tape.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e5\u003c\/span\u003e\u003cspan\u003ePlug the included speed controller securely into the fan before you connect power. Headwind's manual is clear that the controller goes on first.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e6\u003c\/span\u003e\u003cspan\u003ePower up, start at a low speed and step it up until your temperature and humidity hold where you want them, then check the tent walls are pulled in slightly.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003ePairs Well With\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem;\"\u003e\n\u003ca href=\"\/products\/carbon-filters-by-hvc\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eCarbon Filters by HVC\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eHeadwind's matched filter for every fan size, 150mm to 315mm, with two pre-filters in the box.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/smart-speed-controller-by-hvc-thermal-probe-included\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eSmart Speed Controller by HVC\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eSwap the manual dial for automatic control, with fan speed that follows your room temperature.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/seahawk-ducting\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eSeahawk Ducting\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eDucting to join filter, fan and exhaust. Stretch it tight for the quietest run.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/hvc-dura-mixed-flow-fan\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eDura Mixed Flow Fan by HVC\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eThe IP68 waterproof pick for rooms that run above 90% humidity, where this fan should not go.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/ventilation-accessories\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eVentilation Accessories\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eDuct tape and grip tape to seal every join so the fan pulls through the filter, not through gaps.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/inline-exhaust-fans\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eInline \u0026amp; Exhaust Fans\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eEvery inline fan we stock, from compact tent fans to big-room extraction.\u003c\/p\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes the HVC Silenced Fan come with a speed controller?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. Every size, from 150mm to 315mm, ships with a 0–100% variable speed controller in the box.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes it work with HVC smart controllers?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The Silenced Fan works with Headwind's HVC smart controllers, such as the \u003ca href=\"\/products\/smart-speed-controller-by-hvc-thermal-probe-included\" style=\"color: #2e5e2e; font-weight: 600;\"\u003eHVC Smart Speed Controller\u003c\/a\u003e, so fan speed can follow your room conditions instead of sitting on one setting. The smart controller is sold separately. See all of them in our \u003ca href=\"\/collections\/fan-controllers\" style=\"color: #2e5e2e; font-weight: 600;\"\u003eFan Controllers\u003c\/a\u003e range.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow quiet is it?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eAt full speed, measured 3m from the inlet, it runs at 42.9 dBA (150mm), 37.7 dBA (200mm), 43.5 dBA (250mm) and 52.5 dBA (315mm), and lower again when you turn it down. It is not silent: you will still hear air moving at higher speeds, and most of that comes from the ducting, so stretch it tight, keep bends gentle and use acoustic duct on the exhaust side.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhich size do I need?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eMatch the fan to your carbon filter and duct size, and if you are between two sizes, go up and run it slower. Airflow is 594 m³\/h for the 150mm, 1,205 m³\/h for the 200mm, 1,808 m³\/h for the 250mm and 2,987 m³\/h for the 315mm. Our \u003ca href=\"\/pages\/fan-size-calculator\" style=\"color: #2e5e2e; font-weight: 600;\"\u003eFan Size Calculator\u003c\/a\u003e will match a size to your space.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan it run 24 hours a day?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The HVC Silenced range is rated for continuous 24\/7 operation.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan it pull air through a carbon filter?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. With 500 to 677 Pa of static pressure it is built for filtered extraction. Headwind matches each size to an HVC carbon filter: 150 x 300mm, 200 x 750mm, 250 x 1000mm and 315 x 1000mm.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan I use it for intake instead of exhaust?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. Mount it low in a bottom corner with the airflow arrow pointing into your grow space, and fit a pre-filter to keep dust off the impeller. Run intake a little slower than exhaust to keep the tent under slight negative pressure.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan I use it in a very humid room?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo, not above 90% humidity. Headwind rates this fan for rooms below 90% relative humidity and between -10°C and 60°C. For rooms that run wetter than that, the IP68 waterproof \u003ca href=\"\/products\/hvc-dura-mixed-flow-fan\" style=\"color: #2e5e2e; font-weight: 600;\"\u003eHVC Dura Mixed Flow Fan\u003c\/a\u003e is built for it.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs this the same fan as the HVC Inline EC Fan?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. They are separate HVC fans. At 150mm both move 594 m³\/h, but the Silenced Fan measures 42.9 dBA at 3m against 50.3 dBA for the Inline EC, and it comes in sizes up to 315mm.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs there a warranty?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. Headwind covers the HVC Silenced Fan for 12 months.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan I get a replacement controller or cable?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. Replacement controllers, cables and extension leads for HVC fans are available in Australia. Get in touch with your fan size and we will sort the right part.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/details\u003e\n\n\u003cdiv style=\"margin: 2rem 0 0;\"\u003e\n\u003cp style=\"font-size: 0.95rem; font-weight: 700; margin-bottom: 0.75rem; color: #1a1a1a;\"\u003eSelect Size\u003c\/p\u003e\n\u003cdiv style=\"display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1.5rem;\"\u003e\n\u003cbutton data-variant-id=\"53512350073130\" style=\"padding: 0.6rem 1.4rem; border: 2px solid #2e5e2e; border-radius: 6px; background: #2e5e2e; color: #fff; font-size: 0.95rem; font-weight: 700; cursor: pointer;\"\u003e150mm\u003c\/button\u003e\n\u003cbutton data-variant-id=\"53512350105898\" style=\"padding: 0.6rem 1.4rem; border: 2px solid #2e5e2e; border-radius: 6px; background: #fff; color: #2e5e2e; font-size: 0.95rem; font-weight: 600; cursor: pointer;\"\u003e200mm\u003c\/button\u003e\n\u003cbutton data-variant-id=\"53512350138666\" style=\"padding: 0.6rem 1.4rem; border: 2px solid #2e5e2e; border-radius: 6px; background: #fff; color: #2e5e2e; font-size: 0.95rem; font-weight: 600; cursor: pointer;\"\u003e250mm\u003c\/button\u003e\n\u003cbutton data-variant-id=\"53512350171434\" style=\"padding: 0.6rem 1.4rem; border: 2px solid #2e5e2e; border-radius: 6px; background: #fff; color: #2e5e2e; font-size: 0.95rem; font-weight: 600; cursor: pointer;\"\u003e315mm\u003c\/button\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 0;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eQuiet Extraction, Sized to Your Space\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eSpeed controller in the box. Four sizes from 150mm to 315mm.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n\u003ca href=\"\/collections\/fans-silenced\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eShop All Silenced Fans\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n\n  var selectedVariantId = '53512350073130';\n\n  var variantBtns = document.querySelectorAll('button[data-variant-id]');\n  variantBtns.forEach(function(b) {\n    b.addEventListener('click', function() {\n      selectedVariantId = this.getAttribute('data-variant-id');\n      variantBtns.forEach(function(ob) {\n        ob.style.background = '#fff';\n        ob.style.color = '#2e5e2e';\n        ob.style.fontWeight = '600';\n      });\n      this.style.background = '#2e5e2e';\n      this.style.color = '#fff';\n      this.style.fontWeight = '700';\n    });\n  });\n\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt(selectedVariantId, 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e","brand":"Headwind HVC","offers":[{"title":"150mm","offer_id":53512350073130,"sku":"HVC-FAN-SIL-150MM","price":429.95,"currency_code":"AUD","in_stock":true},{"title":"200mm","offer_id":53512350105898,"sku":"HVC-FAN-SIL-200MM","price":549.95,"currency_code":"AUD","in_stock":true},{"title":"250mm","offer_id":53512350138666,"sku":"HVC-FAN-SIL-250MM","price":729.95,"currency_code":"AUD","in_stock":true},{"title":"315mm","offer_id":53512350171434,"sku":"HVC-FAN-SIL-315MM","price":999.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/HVC-Silenced-Fan-03.jpg?v=1794290880","url":"https:\/\/www.thegrowguys.com.au\/products\/hvc-silenced-inline-fan","provider":"The Grow Guys","version":"1.0","type":"link"}