AC Infinity Multifan S2, Quiet USB Cooling Blower, 120MM

AC Infinity MULTIFAN S2 Quiet USB Cooling Blower – 120mm Keep electronics and equipment running cooler with the AC Infinity MULTIFAN S2 Quiet USB Cooling Blower. Unlike a conventional axial fan that pushes air directly forwards, the MULTIFAN S2 features a low-profile blower design that draws air from underneath and exhausts it through the rear, making it ideal for equipment installed inside cabinets, racks and other areas with restricted clearance. Delivering up to 35 CFM of airflow while producing just 17 dBA of noise, the MULTIFAN S2 provides effective targeted cooling without creating excessive background noise. An integrated multi-speed controller allows airflow to be adjusted to suit your equipment and environment. USB-powered operation, a long 6ft power cable, anti-vibration silicone mounts and premium dual-ball bearings make the MULTIFAN S2 a versatile cooling solution for grow room equipment, controllers, AV systems, routers, amplifiers, games consoles and other heat-producing electronics. Key Features 120mm low-profile USB cooling blower Draws warm air from underneath and exhausts it through the rear Ideal for equipment with limited overhead clearance Delivers up to 35 CFM airflow Ultra-quiet 17 dBA operation Three adjustable speed settings In-line speed controller with power switch USB powered for simple installation 6ft / 1.8m power cable Premium dual-ball bearing system Rated lifespan of up to 67,000 hours Can operate horizontally or vertically Silicone anti-vibration mounts help reduce operational noise Additional USB connection for daisy chaining compatible MULTIFAN units Up to four compatible fans can share one suitable USB power source Low 1.05W power consumption Low-Profile Blower Design The MULTIFAN S2 has been specifically designed for applications where a conventional cooling fan may not be suitable. Instead of directing airflow straight upwards or forwards, the blower pulls warm air from underneath the unit and directs it out through the rear. This makes it particularly effective when positioned on top of electronic equipment or inside cabinets where there is limited vertical clearance. Warm air can be drawn away from the equipment and redirected towards the rear of the installation, helping prevent heat from becoming trapped around sensitive components. 35 CFM Airflow Despite its compact, low-profile construction, the MULTIFAN S2 delivers up to 35 CFM of airflow. This provides enough air movement to help remove heat from a wide range of electronic equipment while maintaining a compact footprint of approximately 120 × 120mm. Ultra-Quiet 17 dBA Operation Cooling equipment doesn't need to be noisy. The MULTIFAN S2 produces just 17 dBA during operation, making it particularly suitable for environments where continuous fan noise would be distracting. Four silicone mounts positioned beneath the blower also help absorb vibration and reduce noise transferred between the fan and the surface it is sitting on. Three Adjustable Speed Settings An in-line multi-speed controller allows the MULTIFAN S2 to be adjusted between three fan speed settings, giving you control over the balance between airflow and operating noise. Use a lower setting when only gentle cooling is required or increase the fan speed when additional airflow is needed. An integrated off switch also allows the blower to be conveniently switched off without disconnecting the USB cable. USB Powered for Simple Installation The MULTIFAN S2 features a standard 5V USB power connection, allowing it to operate from suitable USB power sources. This is particularly convenient when cooling equipment that already provides USB connections, such as computers, AV equipment, games consoles and other electronics. The generous 6ft / 1.8m power cable provides additional flexibility when positioning the blower around your equipment. Connect Multiple MULTIFAN Units For installations requiring additional airflow, compatible MULTIFAN S Series fans can be daisy chained together. Each unit features an additional USB connection, allowing up to four compatible fans to share a suitable USB power source. This makes it easy to expand your cooling system when managing larger equipment cabinets or multiple heat-producing components. Long-Life Dual-Ball Bearings The MULTIFAN S2 uses premium dual-ball bearings designed for reliable long-term operation. With a rated lifespan of up to 67,000 hours, the blower is well suited to applications requiring regular or continuous cooling. The bearing system also allows the unit to operate in either a horizontal or vertical position, providing additional flexibility when designing your cooling setup. Ideal for Grow Room Equipment & Electronics Although exceptionally useful for general electronics cooling, the MULTIFAN S2 can also be used around indoor growing equipment where additional targeted airflow is required. Its compact dimensions and low noise level make it particularly useful for cooling controllers, power equipment and other electronics where a full-size circulation fan would be unnecessary. Popular Applications Grow room controllers and electronic equipment AV cabinets and entertainment systems Amplifiers and receivers Routers and modems Games consoles Computers and electronic components Equipment racks Media centres Electronic cabinets Equipment with restricted overhead clearance Technical Specifications Product AC Infinity MULTIFAN S2 Quiet USB Cooling Blower Model AI-MPB140A Fan Size 120mm Dimensions 12 × 12 × 2.5cm Maximum Airflow 35 CFM Noise Level 17 dBA Maximum Speed 1,200 RPM Speed Settings 3 Static Pressure 0.84 mm-H2O Operating Voltage 3–7V DC Power Consumption 1.05W Current 0.2A Power Connection USB Cable Length 6ft / 1.8m Bearings Dual Ball Rated Lifespan 67,000 Hours Mounting Position Horizontal or Vertical Airflow Direction Bottom Intake / Rear Exhaust Frequently Asked Questions What is the difference between a cooling blower and a normal USB fan? A conventional axial cooling fan generally moves air directly through the front and rear of the fan. The MULTIFAN S2 uses a low-profile blower design that draws air from underneath and exhausts it through the rear, making it particularly useful when cooling equipment with limited space above it. How much airflow does the MULTIFAN S2 produce? The MULTIFAN S2 delivers up to 35 CFM of airflow while maintaining exceptionally quiet operation. How quiet is the MULTIFAN S2? The blower has a rated noise level of just 17 dBA. Silicone anti-vibration mounts also help minimise vibration and transferred noise. Can I adjust the fan speed? Yes. The included in-line controller provides three adjustable fan speeds as well as an off position, allowing you to balance cooling performance and noise. Can I connect multiple MULTIFAN units together? Yes. Compatible MULTIFAN S Series units can be daisy chained, with up to four compatible fans sharing a suitable USB power source. Can it run continuously? The premium dual-ball bearing system is designed for long-term operation and has a rated lifespan of up to 67,000 hours, making the MULTIFAN S2 suitable for applications requiring extended cooling periods. Compact Cooling for Tight Spaces The AC Infinity MULTIFAN S2 Quiet USB Cooling Blower is an excellent solution for equipment that requires additional cooling but has limited space available for a conventional fan. Its low-profile bottom-intake and rear-exhaust design efficiently redirects warm air away from electronics, while 35 CFM airflow, ultra-quiet 17 dBA operation and adjustable speed control provide an excellent balance of cooling performance and noise. With USB power, long-life dual-ball bearings, daisy-chain compatibility and flexible horizontal or vertical positioning, the MULTIFAN S2 provides a simple and reliable way to protect electronic equipment from excessive heat.