{"product_id":"ac-infinity-multifan-s4-quiet-usb-cooling-fan-140mm","title":"AC Infinity Multifan S4, Quiet USB Cooling Fan, 140mm","description":"\u003ch1\u003eAC Infinity MULTIFAN S4 Quiet USB Cooling Fan – 140mm\u003c\/h1\u003e\n\u003cp\u003eKeep electronics, controllers and heat-producing equipment running cooler with the \u003cstrong\u003eAC Infinity MULTIFAN S4 Quiet USB Cooling Fan\u003c\/strong\u003e. Featuring a larger 140mm fan design, the MULTIFAN S4 delivers up to \u003cstrong\u003e57 CFM of airflow\u003c\/strong\u003e while producing just \u003cstrong\u003e18 dBA of noise\u003c\/strong\u003e, providing powerful targeted cooling without excessive background noise.\u003c\/p\u003e\n\u003cp\u003eAn integrated \u003cstrong\u003emulti-speed controller\u003c\/strong\u003e allows you to adjust the airflow to suit your equipment and environment, while premium dual-ball bearings provide a rated lifespan of up to \u003cstrong\u003e67,000 hours\u003c\/strong\u003e. The bearing system also allows the fan to operate either horizontally or vertically, giving you plenty of flexibility when positioning it around your equipment.\u003c\/p\u003e\n\u003cp\u003eUSB-powered operation, a generous 6ft cable, anti-vibration rubber feet and the ability to daisy chain additional compatible MULTIFAN units make the S4 an excellent cooling solution for grow room electronics, controllers, computers, AV equipment, games consoles, amplifiers and other heat-producing devices.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eLarge 140mm USB cooling fan\u003c\/li\u003e\n\u003cli\u003eDelivers up to 57 CFM airflow\u003c\/li\u003e\n\u003cli\u003eUltra-quiet operation at just 18 dBA\u003c\/li\u003e\n\u003cli\u003eIn-line multi-speed controller with power switch\u003c\/li\u003e\n\u003cli\u003eAdjustable airflow for different cooling requirements\u003c\/li\u003e\n\u003cli\u003ePremium dual-ball bearing system\u003c\/li\u003e\n\u003cli\u003eRated lifespan of up to 67,000 hours\u003c\/li\u003e\n\u003cli\u003eCan operate horizontally or vertically\u003c\/li\u003e\n\u003cli\u003eUSB powered for simple installation\u003c\/li\u003e\n\u003cli\u003e6ft \/ 1.8m power cable\u003c\/li\u003e\n\u003cli\u003eEight anti-vibration rubber feet help reduce noise and movement\u003c\/li\u003e\n\u003cli\u003eAdditional USB connection for daisy chaining compatible MULTIFAN units\u003c\/li\u003e\n\u003cli\u003eUp to four compatible fans can share a suitable USB power source\u003c\/li\u003e\n\u003cli\u003eLow 1.5W power consumption\u003c\/li\u003e\n\u003cli\u003eCE and RoHS certified\u003c\/li\u003e\n\u003cli\u003eFan meets UL-507 safety standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePowerful 57 CFM Airflow\u003c\/h2\u003e\n\u003cp\u003eThe larger \u003cstrong\u003e140mm fan\u003c\/strong\u003e allows the MULTIFAN S4 to deliver up to 57 CFM of airflow, making it an excellent choice when more cooling performance is required from a compact USB-powered fan.\u003c\/p\u003e\n\u003cp\u003eIts larger blade area allows substantial volumes of air to be moved at relatively low fan speeds, helping provide effective cooling while maintaining exceptionally quiet operation.\u003c\/p\u003e\n\u003ch2\u003eUltra-Quiet 18 dBA Operation\u003c\/h2\u003e\n\u003cp\u003eDespite its increased size and airflow capacity, the MULTIFAN S4 produces just \u003cstrong\u003e18 dBA of noise\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis makes it particularly suitable for equipment that requires continuous cooling in noise-sensitive environments, providing effective airflow without the distracting sound associated with many conventional equipment cooling fans.\u003c\/p\u003e\n\u003ch2\u003eAdjustable Multi-Speed Controller\u003c\/h2\u003e\n\u003cp\u003eThe included in-line multi-speed controller allows you to adjust fan performance depending on the amount of cooling required.\u003c\/p\u003e\n\u003cp\u003eIncrease the speed when additional airflow is needed or reduce it when only gentle ventilation is required. This gives you greater control over the balance between cooling performance, airflow and operating noise.\u003c\/p\u003e\n\u003cp\u003eThe controller also features a convenient power switch, allowing the fan to be turned off without disconnecting the USB cable.\u003c\/p\u003e\n\u003ch2\u003ePremium Dual-Ball Bearings\u003c\/h2\u003e\n\u003cp\u003eThe MULTIFAN S4 uses premium \u003cstrong\u003edual-ball bearings\u003c\/strong\u003e engineered for reliable long-term operation.\u003c\/p\u003e\n\u003cp\u003eWith a rated lifespan of up to \u003cstrong\u003e67,000 hours\u003c\/strong\u003e, the fan is suitable for applications where regular or continuous equipment cooling is required.\u003c\/p\u003e\n\u003cp\u003eThe dual-ball bearing construction also allows the fan to operate in either a horizontal or vertical position without compromising its expected lifespan, providing much greater flexibility when positioning the unit.\u003c\/p\u003e\n\u003ch2\u003eUSB Powered for Easy Installation\u003c\/h2\u003e\n\u003cp\u003eThe MULTIFAN S4 is USB powered, allowing it to connect to compatible USB power sources commonly found on computers, AV equipment, games consoles and other electronic devices.\u003c\/p\u003e\n\u003cp\u003eA generous \u003cstrong\u003e6ft \/ 1.8m power cable\u003c\/strong\u003e gives you plenty of freedom when positioning the fan around equipment racks, cabinets and grow room electronics.\u003c\/p\u003e\n\u003cp\u003eWith power consumption of just \u003cstrong\u003e1.5 watts\u003c\/strong\u003e, the S4 also provides an energy-efficient option for equipment requiring extended periods of cooling.\u003c\/p\u003e\n\u003ch2\u003eConnect Multiple MULTIFAN Units\u003c\/h2\u003e\n\u003cp\u003eFor larger installations requiring additional airflow, compatible MULTIFAN S Series fans can be daisy chained together.\u003c\/p\u003e\n\u003cp\u003eEach fan features an additional USB connection, allowing \u003cstrong\u003eup to four compatible MULTIFAN units to share the same suitable USB power source\u003c\/strong\u003e. This provides an easy way to expand your cooling setup without requiring individual power connections for every fan.\u003c\/p\u003e\n\u003ch2\u003eAnti-Vibration Rubber Feet\u003c\/h2\u003e\n\u003cp\u003eThe MULTIFAN S4 includes \u003cstrong\u003eeight large anti-vibration rubber feet\u003c\/strong\u003e that help absorb movement and reduce vibration transferred between the fan and surrounding surfaces.\u003c\/p\u003e\n\u003cp\u003eThis allows the fan to be placed directly on top of or beside compatible equipment while helping maintain quiet and stable operation.\u003c\/p\u003e\n\u003ch2\u003eHorizontal or Vertical Positioning\u003c\/h2\u003e\n\u003cp\u003eThanks to its premium dual-ball bearing construction, the MULTIFAN S4 can be positioned either \u003cstrong\u003eflat or upright\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis versatility makes it easier to direct airflow exactly where it's needed, whether you're drawing warm air away from electronics, pushing fresh air towards equipment or improving ventilation inside an equipment cabinet.\u003c\/p\u003e\n\u003ch2\u003eIdeal for Grow Room Equipment\u003c\/h2\u003e\n\u003cp\u003eControllers, power supplies and other electronic equipment inside grow rooms can generate additional heat, particularly when several devices are positioned close together.\u003c\/p\u003e\n\u003cp\u003eThe MULTIFAN S4 provides targeted airflow around these components without requiring a full-size circulation fan. Its combination of high airflow, low noise, compact dimensions and USB power makes it a convenient option for additional equipment cooling within indoor growing environments.\u003c\/p\u003e\n\u003ch2\u003ePopular Applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGrow room controllers and electronics\u003c\/li\u003e\n\u003cli\u003ePower supplies and electrical equipment\u003c\/li\u003e\n\u003cli\u003eComputers and computer components\u003c\/li\u003e\n\u003cli\u003eAV receivers\u003c\/li\u003e\n\u003cli\u003eAmplifiers\u003c\/li\u003e\n\u003cli\u003eGames consoles\u003c\/li\u003e\n\u003cli\u003eDVRs and media equipment\u003c\/li\u003e\n\u003cli\u003eRouters and modems\u003c\/li\u003e\n\u003cli\u003eElectronic cabinets\u003c\/li\u003e\n\u003cli\u003eEquipment racks\u003c\/li\u003e\n\u003cli\u003eHome entertainment systems\u003c\/li\u003e\n\u003cli\u003eOther heat-producing electronics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAC Infinity MULTIFAN S4 Quiet USB Cooling Fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAI-MPF140A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFan Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e140mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14 × 14 × 2.5cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Airflow\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e57 CFM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNoise Level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18 dBA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum Speed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1,200 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStatic Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.84 mm-H2O\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3–7V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.5W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.3A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUSB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCable Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6ft \/ 1.8m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBearings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDual Ball\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRated Lifespan\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e67,000 Hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMounting Position\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHorizontal or Vertical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUL, CE \u0026amp; RoHS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eMULTIFAN S1, S3 or S4?\u003c\/h2\u003e\n\u003cp\u003eThe MULTIFAN range provides several fan sizes, allowing you to choose the level of airflow that best suits your equipment and available space.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMULTIFAN S1 – 80mm:\u003c\/strong\u003e Compact option delivering up to 26 CFM, ideal for smaller electronics and restricted spaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMULTIFAN S3 – 120mm:\u003c\/strong\u003e Mid-sized option delivering up to 52 CFM for increased equipment cooling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMULTIFAN S4 – 140mm:\u003c\/strong\u003e Larger single-fan option delivering up to 57 CFM for applications requiring greater airflow coverage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor applications where space allows and maximum airflow from a single MULTIFAN is preferred, the 140mm S4 provides an excellent combination of cooling performance and quiet operation.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eHow much airflow does the MULTIFAN S4 produce?\u003c\/h3\u003e\n\u003cp\u003eThe MULTIFAN S4 delivers up to \u003cstrong\u003e57 CFM of airflow\u003c\/strong\u003e from its 140mm fan.\u003c\/p\u003e\n\u003ch3\u003eHow quiet is the MULTIFAN S4?\u003c\/h3\u003e\n\u003cp\u003eThe fan produces just \u003cstrong\u003e18 dBA\u003c\/strong\u003e of operating noise, making it suitable for environments where quiet continuous cooling is important.\u003c\/p\u003e\n\u003ch3\u003eCan I adjust the fan speed?\u003c\/h3\u003e\n\u003cp\u003eYes. The included in-line multi-speed controller allows you to adjust the fan to achieve the preferred balance between airflow and operating noise.\u003c\/p\u003e\n\u003ch3\u003eCan the MULTIFAN S4 be laid flat?\u003c\/h3\u003e\n\u003cp\u003eYes. Its dual-ball bearing construction allows the fan to operate either horizontally or vertically, giving you greater flexibility when directing airflow around your equipment.\u003c\/p\u003e\n\u003ch3\u003eCan I connect multiple MULTIFAN fans together?\u003c\/h3\u003e\n\u003cp\u003eYes. Compatible MULTIFAN S Series fans can be daisy chained together, with up to four compatible units sharing a suitable USB power source.\u003c\/p\u003e\n\u003ch3\u003eIs the MULTIFAN S4 suitable for continuous use?\u003c\/h3\u003e\n\u003cp\u003eYes. The premium dual-ball bearing system has a rated lifespan of up to \u003cstrong\u003e67,000 hours\u003c\/strong\u003e, making the S4 suitable for applications requiring regular or extended operation.\u003c\/p\u003e\n\u003ch2\u003ePowerful \u0026amp; Quiet 140mm Equipment Cooling\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eAC Infinity MULTIFAN S4 Quiet USB Cooling Fan\u003c\/strong\u003e is an excellent choice when you need increased airflow without the noise and bulk of a conventional circulation fan. Its large 140mm design delivers up to 57 CFM while maintaining an exceptionally quiet 18 dBA noise level.\u003c\/p\u003e\n\u003cp\u003eWith adjustable speed control, USB power, long-life dual-ball bearings, anti-vibration feet and flexible horizontal or vertical positioning, the MULTIFAN S4 provides reliable targeted cooling for grow room equipment, computers, AV systems and a wide range of heat-producing electronics.\u003c\/p\u003e","brand":"AC INFINITY","offers":[{"title":"Default Title","offer_id":58266512195967,"sku":null,"price":19.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/0571\/1635\/files\/StorePhoto1__24158_1800x1800_ccda9fe2-e91d-43fe-8ca8-73c55ee6ac02.webp?v=1787661109","url":"https:\/\/greenspirit-hydroponics.com\/products\/ac-infinity-multifan-s4-quiet-usb-cooling-fan-140mm","provider":"Green Spirit Horticulture","version":"1.0","type":"link"}