AC Infinity Multifan S2 35 CFM Spot Cooler 1 x 120mm

Multifan S2- 120mm Quiet USB Cooling Blower

The MULTIFAN S2 quiet USB blower can be placed on top of various electronics and components. Features a multi-speed controller with three speed settings and off switch located on the cord. Six foot power cord contains a 5V DC USB plug that can power the blower through any USB port. Includes four silicone fan mounts that are attached to the bottom of the blower to absorb vibrations and to reduce noise. Each unit contains an additional USB port, up to four blowers can be daisy chained together to share the same power source. Rated at 67,000 hours, each dual ball bearing blower is certified by CE and RoHS.

Key Features:
- Quiet blower designed to be placed on top of various electronics to draw out heat
- Features a multi-speed controller to set the fan’s speed to optimal noise and airflow levels.
- Low profile design pushes air out the rear, ideal for applications with limited clearance
- Dual-ball bearings have a lifespan of 67,000 hours and allows the fan to be laid flat or stand upright.
- USB plug can power the fan through USB ports found behind electronics and on portable power banks.
- Dimensions: 4.7 x 4.7 x 1 in. | Airflow: 35 CFM | Noise: 17 dBA | Bearings: Dual Ball | Power: USB

User Manual (PDF, 331KB)

USB Powered

The Multifan series spot coolers are powered by the connected USB cable with in-line speed controller. Plug this fan into a USB outlet on your AV device, computer, or wall adapter for instant and effective airflow. No external power supplies necessary!

Speed Controller

The blower includes an in-line multi-speed controller with power switch to set the fan’s speed to optimal noise and airflow levels for various environments.

Connecting Additional Units

For electronics and components that requires more airflow, each fan unit can daisy chain additional MULTIFAN S series fans. Up to four fans can share the same USB power source. MULTIFAN S1, S2, S3 and S4 contains one fan, and MULTIFAN S5 and S7 contains two fans.

Applications

This ultra-quiet blower is designed pull air from the bottom and push it out the rear. It is ideal for electronics and components positioned in a cabinet or rack with a limited clearance height. Popular applications include modems, routers, receivers, amplifiers, game consoles, home theatre, AV cabinets, and entertainment media centres.

How Many Fans Do I Need?

Cabinet Cooling Calculator

Enter your cabinet’s inside dimensions (cm)

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Inside Length (cm) Inside Width (cm) Inside Height (cm)

Calculate Airflow

We Recommend 3 Air Changes per Minute

Every fan has a CFM rating - that’s the volume of air it moves per minute. A higher CFM means faster ventilation. But keep in mind, manufacturer ratings are measured under near-perfect conditions: no heat load, no restrictions, zero static pressure. In the real world, actual performance is always lower.

Inside your cabinet, airflow is influenced by the number of components, the heat they generate, and how freely air can move in and out. That’s why our calculator aims for roughly three complete air changes per minute. This ensures reliable cooling for most AV and electronics cabinets.

Tip: If your cabinet is tightly packed, poorly vented, or located in a warm room, step up to the next fan size or add an extra exhaust unit for peace of mind.