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AC Infinity Multifan S3 Ultra Quiet Cooling SolutionBloomingFressia

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AC Infinity MULTIFAN S3, Quiet 120mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling

Name: Amazon.com: AC Infinity MULTIFAN S3, Quiet 120mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling : Industrial & Scientific
Price: 13.99 USD
Availability: InStock
Rating: 4.7 (5996 reviews)

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Color: Black

Size: 120 mm

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Purchase options and add-ons

Product Dimensions	4.7"L x 1"W x 4.7"H
Brand	AC Infinity
Power Connector Type	USB
Voltage	5 Volts
Wattage	5 watts
Cooling Method	Air
Compatible Devices	Amplifier
Noise Level	18 dB
Material	Rubber
Maximum Rotational Speed	1300 RPM

About this item

Ultra-quiet UL-certified USB fan designed to cool various electronics and components.
Features a multi-speed controller to set the fan’s speed to optimal noise and airflow levels.
Dual-ball bearings have a lifespan of 67,000 hours and allows the fans to be laid flat or stand upright.
USB plug can power the fan through USB ports found behind popular AV electronics and game consoles.
Fan Size: 4.7 x 4.7 x 1 in. | Airflow: 52 CFM | Noise: 18 dBA | Bearings: Dual Ball

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This item: AC Infinity MULTIFAN S3, Quiet 120mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling

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AC Infinity MULTIFAN S7, Quiet Dual 120mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling

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AC Infinity Controller 1, Thermal Trigger for AIRPLATE, MULTIFAN, USB Fans and Devices. Computer, AV Cabinet, Home Theater Cooling.

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Product details

Is Discontinued By Manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 4.7 x 1 x 4.7 inches; 0.32 ounces
Item model number ‏ : ‎ FBA_AI-MPF120A
Date First Available ‏ : ‎ October 18, 2013
Manufacturer ‏ : ‎ AC Infinity
ASIN ‏ : ‎ B00G05A2MU
Country of Origin ‏ : ‎ China

Best Sellers Rank: #17 in Computer Case Fans

Customer Reviews:
5,996 ratings

WARNING: California’s Proposition 65

Top Brand: AC Infinity

Highly Rated

100K+ customers rate items from this brand highly

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From the brand

AC Infinity is a technology company that specializes in environmental controls for audio/video and HVAC. The company was founded on the principle of working closely with customers to develop great products. Dependable service and a commitment to product quality are the foundations of the business's values.
AIRCOM Series

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AIRPLATE Series

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CLOUDPLATE Series

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MULTIFAN Series

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Product Description

AC Infinity MULTIFAN Quiet USB Fan for Receiver DVR Playstation Xbox Computer Cabinet Cooling

MULTIFAN Series

Designed to quietly cool Xboxs, Playstations, Rokus, Apple TVs, receivers, modems, routers, DVRs, computers, and other audio video electronics.

Key Features

Multi-Speed Controller

Inline switch enables you to optimize fan speed for various applications. Can be powered through USB ports found behind AV electronics and consoles.

Ultra-Quiet Fans

Designed to maximize airflow CFM to noise dBA ratio. Dual-ball bearings rated at 67,000 hours allows the fans to be laid flat or stand upright.

Quality Approved

Contains UL recognized axial fans under #E503903 in 2018 by Underwriter Laboratories. Archived in UL Online Certifications Directory.

Silicone Rubber Feet

Absorbs noise and surface friction caused by fan vibrations. Unused pieces can be detached to reduce overall height for tight spaces.

	AC Infinity, MULTIFAN S1 Quiet USB Cooling Fan	AC Infinity, MULTIFAN S3 Quiet USB Cooling Fan	AC Infinity, MULTIFAN S4 Quiet USB Cooling Fan	AC Infinity, MULTIFAN S5 Quiet USB Cooling Fan	AC Infinity, MULTIFAN S7 Quiet USB Cooling Fan	AC Infinity, MULTIFAN S2 Quiet USB Cooling Blower

Customer Reviews	5,810	5,996	3,121	10,273	7,817	1,452
Price	$12.99	$13.99	$16.99	$16.99	$21.99	$17.99
Model	AI-MPF80A	AI-MPF120A	AI-MPF140A	AI-MPF80A2	AI-MPF120A2	AI-MPB140A
Dimensions	80x80x25 mm	120x120x25 mm	140x140x25 mm	80x80x25 mm (x2)	120x120x25 mm (x2)	120x120x25 mm
Airflow	26 CFM	52 CFM	52 CFM	104 CFM	104 CFM	35 CFM
Noise	17 dBA	18 dBA	18 dBA	18 dBA	19 dBA	17 dBA
Multi-Speed Controller with Power Switch	✓	✓	✓	✓	✓	✓
Dual Ball Bearings at up to 67,000 Hrs	✓	✓	✓	✓	✓	✓
Axial Fans Meet UL-507 Standards in 2018 for Safety (Underwriters Laboratories #E503903)	✓	✓	✓	✓	✓	✓
USB Plug with 6-foot Power Cord	✓	✓	✓	✓	✓	✓
Compatible with Turbo Wall Adapter (Sold Separately)	✓	✓	✓	✓	✓	✓
Applications (Can by laid flat or stand upright)	Receiver, DVR, Router, Modem, Xbox, Playstation, and other Audio Video electronics	Receiver, DVR, Router, Modem, Xbox, Playstation, and other Audio Video electronics	Receiver, DVR, Router, Modem, Xbox, Playstation, and other Audio Video electronics	Receiver, DVR, Router, Modem, Xbox, Playstation, and other Audio Video electronics	Receiver, DVR, Router, Modem, Xbox, Playstation, and other Audio Video electronics	Receiver, DVR, Amplifier, Router, Modem, and other Audio Video electronics

Product guides and documents

Certificate of Analysis (PDF)

Certificate of Compliance (PDF)

Safety Information (PDF)

User Manual (PDF)

Customer reviews

5,996 global ratings

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Customers say

Customers find the fan surprisingly quiet and effective at cooling various devices, with hard drive temperatures dropping by 20°C. They appreciate its excellent build quality with durable silicone isolators, USB power connection, and three different speed settings. Customers consider it well worth the price.

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Quietness Works well Keeps electronics cool Air flow Build quality Usb power Speed control Value for money

1,015 customers mention "Quietness"904 positive111 negative

Customers appreciate the fan's quiet operation, noting that it runs almost inaudible and remains silent even at high speeds.

"The AC Infinity 120mm fan is a solid & quiet cooling fan...." Read more

"...The rubber feet on all corners eliminate any vibration noises or humming, and also keeps the fan from moving anywhere...." Read more

"...In a quiet office/basement, I can hear the fan running (I listen for any new slight noise in case it indicates a problem)...." Read more

"...I wanted an external fan that was extremely quiet, had an RPM adjustment switch, had vibration dampening feet or pads, and was USB-powered...." Read more

727 customers mention "Works well"727 positive0 negative

Customers find that the fan works well, particularly with PS4 Pro consoles, and one customer mentions it performs perfectly even at the lowest setting.

"...Long story short, this fan works flawlessly. It checks all the boxes. Silent running...." Read more

"...The two fan approach works quite nicely for me: At the end of a 12-hour Fallout 4 session recently, I lifted the top fan off and put my hand right..." Read more

"...Small, but not so small that it can't move air. QUIET! Effective..." Read more

"...Works really well." Read more

712 customers mention "Keeps electronics cool"663 positive49 negative

Customers report that the fan effectively cools their devices, with hard drive temperatures dropping by 20°C and maintaining comfortable drive temperatures.

"...These help move the hot air out of the semi-enclosed space the box is in." Read more

"Xbox One is a fantastic gaming system, but man, does that little black box get hot! Especially after 12-16 hours in Fallout 4...." Read more

"...Cabinet temps seldom exceed 5-7 degrees over the ambient room temp. The 120mm seems to be the best fan for the money...." Read more

"...At medium speed, it lowered temperatures by about 10C, simply blowing air across the router from the side...." Read more

379 customers mention "Air flow"321 positive58 negative

Customers appreciate the fan's air flow, noting that it moves enough air and performs well at low speeds.

"...There is a subtle movement of air as well, not a breeze; simply lick the back of your hand and hold it 2 feet away and you will notice the cooling..." Read more

"...This allows me to put the fan external to the device and force air through it. The fan runs quiet on slow speed...." Read more

"...at ~75C. With the MULTIFAN S3 in place, peaks hit 65C. Excellent for low-RPM, purely external cooling!..." Read more

"This is a solid fan with great value. At high it moves a decent amount of air, and on low it's nearly silent from more than 2 feet away..." Read more

326 customers mention "Build quality"299 positive27 negative

Customers praise the build quality of the fan, noting its sturdy construction, durable silicone isolators, and good amount of heft, with one customer mentioning it should last for many years.

"The AC Infinity 120mm fan is a solid & quiet cooling fan...." Read more

"This is a solid fan with great value. At high it moves a decent amount of air, and on low it's nearly silent from more than 2 feet away..." Read more

"Very quiet and well build fan. I would have given it 5 stars but the shipping (DHL Express to Costa Rica) was horrible" Read more

"Moves a decent amount of air, is very quiet, and feels to be made of durable materials. Used for Xbox 360 slim." Read more

232 customers mention "Usb power"224 positive8 negative

Customers appreciate that the fan can be powered from a USB port, with the option to use an extra USB outlet.

"...It's a good fit and utilizes the side USB port (I didn't even know it was there)...." Read more

"...The fan is running on medium speed and getting power from the routers USB port. The fan runs almost 24/7. So far so good after two weeks...." Read more

"...I like the different fan speeds you can set and the usb looks to be pass through so if you were using the usb port you still can." Read more

"This is an efficient USB powered fan. Great for vintage or newer equipment that generates a lot of heat." Read more

192 customers mention "Speed control"150 positive42 negative

Customers appreciate the fan's speed control features, which include three different settings and a speed switch.

"...It checks all the boxes. Silent running. Multiple speeds..." Read more

"...The newest AC Infinity now has a variable speed switch, and costs less. Cabinet temps seldom exceed 5-7 degrees over the ambient room temp...." Read more

"...I wanted an external fan that was extremely quiet, had an RPM adjustment switch, had vibration dampening feet or pads, and was USB-powered...." Read more

"...So far, I am happy with this newer model fan. The variable speed switch is nice, shame they took out the USB-to-AC power adapter, but that's OK, I..." Read more

175 customers mention "Value for money"164 positive11 negative

Customers find the fan offers good value for money, with several noting it's well made for its price point, and one mentioning it provides excellent air circulation for its cost.

"...Inexpensive. I have a router right next to the Firewalla so just used the USB from that for power but any USB type A will do...." Read more

"...My solution is simple and relatively inexpensive (especially considering the cost of a new XB1). It's also two-pronged: PART ONE: This fan...." Read more

"...The 120mm seems to be the best fan for the money. Original review: Small, but not so small that it can't move air. QUIET!..." Read more

"This is a solid fan with great value. At high it moves a decent amount of air, and on low it's nearly silent from more than 2 feet away..." Read more

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M. Vigod
Very good cooling fan. Multiple speeds. Good airflow. Very very quiet to silent!
Reviewed in the United States on April 6, 2025
Color: BlackSize: 120 mmVerified Purchase

The AC Infinity 120mm fan is a solid & quiet cooling fan. I needed something to place either near or on top of my Firewalla Gold as it gets very hot at times and I wanted to see if something could be done to cool it down with zero noise. For $14 I decided to give this well-reviewed cooling fan a shot.

Long story short, this fan works flawlessly. It checks all the boxes. Silent running. Multiple speeds (I keep mine on the lowest as that is all that is required to bring the Firewalla cooling fins down to room temp or lower). Inexpensive. I have a router right next to the Firewalla so just used the USB from that for power but any USB type A will do.

I also purchased their 80mm dual fans as well and using those on a Comcast Cable X1 box that gets hot in my entertainment center. These help move the hot air out of the semi-enclosed space the box is in.

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just being Frank
AC Infinity AI-MPF120A cooling fan -- Quiet and effective for confined heat-producing electronics -- RECOMMENDED
Reviewed in the United States on January 29, 2015
Color: BlackSize: 120 mmVerified Purchase
Update 3/2018: Expansion of the home network to include a home office resulted in another cooling fan for my crowded computer center (converted credenza, snug). The newest AC Infinity now has a variable speed switch, and costs less. Cabinet temps seldom exceed 5-7 degrees over the ambient room temp. The 120mm seems to be the best fan for the money.

Original review:
Small, but not so small that it can't move air.
QUIET!
Effective
Once "installed" (more like placed in a cabinet), they are set-and-forget.

I purchased 2 of these, being unsure att eh time how effective they would be in a renovated office credenza-become-computer center.
Within the top half of this cabinet space, just under 3 cubic feet (9"h x 18"d x30" w) I have a satellite modem (runs very warm), 2 routers and a switch, and a desktop refurbished as a firewall.

Before stuffing all these components into this space, they occupied the lower half of a bookcase that sat atop the credenza, and all were clearly producing heat. Therefore the notion that these AC Infinity fans (or similar) would be required inside the smaller credenza space.

I started by placing one fan in the rear of the cabinet to push air (cool air from below) across the very warm sat modem and router out to the front of the open cabinet, and there I placed fan #2 to help pull warm air out and into the room.

Both fans run exceptionally quiet, and I needed to check occasionally to reassure myself they were still spinning. There is a subtle movement of air as well, not a breeze; simply lick the back of your hand and hold it 2 feet away and you will notice the cooling effect on your skin (an old IT "procedure" for detecting failed equipment fans, always works if not sometimes salty).

An indoor/outdoor thermometer served as a great way to measure temps outside the credenza and deep inside (placing the remote temp sensor near to the warmest component, the sat modem in my case). For 2 days the interior cabinet temps remained within 6-9 degrees of the room temp.

So I removed fan # 2 (front of the cab opening), all without more than 1 degree increase resulting.

Bottom line: small but moves air (don't expect a whirlwind or obvious breeze, it's pretty subtle), and very quiet.
The rubber feet on all corners eliminate any vibration noises or humming, and also keeps the fan from moving anywhere.
The alternative might be the AI-MPF80A2 dual 80mm fans (52cfm total) if space is an issue.
If heat is more of an issue than what I described here, consider the AI-MPF120A2 dual 120mm fans, 104cfm total.
Depending on how my single 120mm handles heat this coming summer, I may opt for this dual 120mm fan setup.

As for the optional fan thermostat and speed control, I simply let my fans run off any available USB port and do their work.

Recommended, keeping your gear cool (or not hot) at this price is great insurance.

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Mike Glenn
Hot Xbox One? No More!
Reviewed in the United States on March 24, 2016
Color: BlackSize: 120 mmVerified Purchase
Xbox One is a fantastic gaming system, but man, does that little black box get hot! Especially after 12-16 hours in Fallout 4. Yes, the XB1 has a large internal fan, but it's lethargic: it draws a small volume of fresh air and pushes out an equally small volume of hot air out the top. Some say this is enough: 'That's way they designed it!' I know, I've read all those articles (and so have you, I'm guessing). But you're reading this review now because, like me, you've come to realize that 'design myth' is just that: a myth. I'm being polite here; you may have another word for it. Put simply: That box is too damn hot. And heat is killer for high-end electronics.
My solution is simple and relatively inexpensive (especially considering the cost of a new XB1). It's also two-pronged:
PART ONE: This fan. Place it on top of the exhaust vent to help pull hot air up and out. (Use a deflector to redirect air flow if your XB1 is in a cramped location like a bookcase.) Fan can use one of the two USB slots on back of XB1.
PART TWO: (and this is important) A side vent fan of some sort. Blowing in. Another 120mm sitting on the outside? Maybe. It's so quiet, I may try that. The fan I chose however was the DOBE integrated side-vent fan. Available on Amazon. (There are several fans of identical design which makes me think there's one manufacturer and many distributors - I chose DOBE because their ad was almost in English). Snap out the old vent/dust cover (use a thin butter knife and throw out the plastic pry included) and then snap in the fan unit. It's a good fit and utilizes the side USB port (I didn't even know it was there). The design gives you back two USB ports to compensate but I haven't tried them (I've read there may be data transfer issues vis-à-vis external HDDs but that's beyond the cooling focus here).
The two fan approach works quite nicely for me: At the end of a 12-hour Fallout 4 session recently, I lifted the top fan off and put my hand right on the exhaust vent and could barely discern the heat. What a difference!
DOWNSIDE? Only from the integrated side-vent fan: A slight fan-hum is audibly discernable even on the low setting. I think I can live with it though given the results. The AC Infinity fan on the other hand is whisper quiet. When the DOBE stops working I may just buy a second 120mm and stick it along the side vent and see how that works. Hope that helps all you XB1 gamers out there have a cool summer!

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mountaineer
quiet fan. Excellent for external cooling needs.
Reviewed in the United States on October 10, 2024
Color: BlackSize: 120 mmVerified Purchase
I bought this for a couple potential scenarios. I have several fanless devices (switches, firewalls, etc.) that act up from time to time. So I think an external fan run off USB would be useful. The other is a mini computer with a custom fan that is no longer made by the manufacturer of fans. This allows me to put the fan external to the device and force air through it.

The fan runs quiet on slow speed. In a quiet office/basement, I can hear the fan running (I listen for any new slight noise in case it indicates a problem). I'll stop and listen intently to try to find the noise and then realize it is just the fan. The rubber pads keep it off the surface enough to get sufficient airflow and do not vibrate the device. Works really well.

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dualw
Well built and very quiet
Reviewed in the United Kingdom on September 24, 2021
Color: BlackSize: 120 mmVerified Purchase

Note: Product purchased directly from seller AC Affinity and fulfilled by Amazon.
I use this to improve the air circulation on my Xbox One, which is housed in a narrow TV cabinet. Even though the cabinet is not fully closed, the external of the Xbox can get very hot, especially during a long session. I placed this fan directly on over the Xbox's top vents, blowing away from the xbox.
The build quality is solid. You can shake it about, try to bend or squeeze it, there is no rattling or even creaking noise. Around the frame, all surfaces that you can touch, it is all smooth, no hint of any sharp edges. When the fan is running it is very quiet. There is a mechanical switch built into the USB cable. This switch has 4 positions; OFF, speed 1, 2 and 3. At speed 1, you wont even know it is running. Speed 2, in a room without any other sound you can almost hear it, but it is still quieter than my external Western Digital hard drive. Speed 3, well, you can definitely hear it. Not that the motor is noisy, just the wind noise it generated, and if you have the TV speaker on, it will drown out the noise from the fan. The OFF position is very useful, because I connected to the XBox usb port, and the port is always powered, even when Xbox is in standby/sleep mode. With the OFF position I can switch off the fan when I not using the Xbox. This is so effective, speed 1 is enough to keep the Xbox cool. The fan comes with 4 rubber feet attached, it does a very good job of keeping the fan on top of the xbox.
At £15, this us not the cheapest 120mm fan on Amazon, but I am convinced this is worth its price tag. It is certainly has done what I needed it to do and quality is great. Only question is, how long will it last, time will tell. I would highly recommend this fan to anyone looking to improve air circulation for AV devices.

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Gerald Rajesh
Excellent product
Reviewed in India on July 27, 2018
Color: BlackSize: 120 mmVerified Purchase
Excellent performance just love it build quality excellent keeps my PS4 and Xbox one x in ample temperature

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Thor
great
Reviewed in the United Arab Emirates on February 25, 2025
Color: BlackSize: 120 mmVerified Purchase
great, installed in a PC cabinet. works perfectly

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Starrus
Quiet and Effective
Reviewed in Singapore on January 8, 2024
Color: BlackSize: 120 mmVerified Purchase
This is my 2nd time getting from AC Infiniity. My first, two fans affixed to my home server cabinet, have been running 24/7 for the last 4 years. They are still quiet and blowing strongly. That says a lot.

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Amazon カスタマー
事務仕事でも使える！
Reviewed in Japan on October 4, 2024
Color: BlackSize: 120 mmVerified Purchase
事務仕事用に使用しています。
ファンの音はめちゃ静か、風当たりも優しくて凄くいいです！
最大でも強風とまではいきませんが、それでも十分な風量はあります。
普段は最初は強で、10分後くらいに弱にして使用しています。
デスク用のファンとしても、かなり使い勝手がいいと思います。

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AC Infinity MULTIFAN S3, Quiet 120mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling

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Top Brand: AC Infinity

From the brand

AIRCOM Series

AIRPLATE Series

CLOUDPLATE Series

MULTIFAN Series

Product Description

MULTIFAN Series

Key Features

Multi-Speed Controller

Ultra-Quiet Fans

Quality Approved

Silicone Rubber Feet

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Top reviews from the United States

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5.0 out of 5 stars Very good cooling fan. Multiple speeds. Good airflow. Very very quiet to silent!

5.0 out of 5 stars AC Infinity AI-MPF120A cooling fan -- Quiet and effective for confined heat-producing electronics -- RECOMMENDED

5.0 out of 5 stars Hot Xbox One? No More!

5.0 out of 5 stars quiet fan. Excellent for external cooling needs.

Top reviews from other countries

5.0 out of 5 stars Well built and very quiet

5.0 out of 5 stars Excellent product

5.0 out of 5 stars great

5.0 out of 5 stars Quiet and Effective

5.0 out of 5 stars 事務仕事でも使える！

Very good cooling fan. Multiple speeds. Good airflow. Very very quiet to silent!

AC Infinity AI-MPF120A cooling fan -- Quiet and effective for confined heat-producing electronics -- RECOMMENDED

Hot Xbox One? No More!

quiet fan. Excellent for external cooling needs.

Well built and very quiet

Excellent product

great

Quiet and Effective

事務仕事でも使える！