--- product_id: 1176317 title: "AC Infinity, MULTIFAN S3 Quiet USB Cooling Fan" brand: "ac infinity" price: "127.61 DT" currency: TND in_stock: true reviews_count: 13 category: "Ac Infinity" url: https://www.desertcart.tn/products/1176317-ac-infinity-multifan-s3-quiet-usb-cooling-fan store_origin: TN region: Tunisia --- # 52 CFM airflow Ultra-quiet 18 dBA noise 67,000 hrs dual-ball bearing lifespan AC Infinity, MULTIFAN S3 Quiet USB Cooling Fan **Brand:** ac infinity **Price:** 127.61 DT **Availability:** ✅ In Stock ## Summary > 🆒 Stay cool, stay ahead—because your tech deserves the best breeze. ## Quick Answers - **What is this?** AC Infinity, MULTIFAN S3 Quiet USB Cooling Fan by ac infinity - **How much does it cost?** 127.61 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/1176317-ac-infinity-multifan-s3-quiet-usb-cooling-fan) ## Best For - ac infinity enthusiasts ## Why This Product - Trusted ac infinity brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Mounting:** Lay flat or stand upright—fits any setup seamlessly. - • **Plug & Play USB Power:** Easy USB connectivity powers your fan anywhere. - • **Whisper-Quiet Cooling:** Keep your gear chill without the noise distraction. - • **Precision Speed Control:** Multi-speed settings tailor airflow to your exact needs. - • **UL-Certified Reliability:** Safety and quality guaranteed for peace of mind. ## Overview The AC Infinity MULTIFAN S3 is a UL-certified, ultra-quiet 120mm USB fan delivering 52 CFM airflow at just 18 dBA noise. Featuring durable dual-ball bearings rated for 67,000 hours, it offers flexible flat or upright positioning and multi-speed control for optimal cooling of electronics like receivers, DVRs, gaming consoles, and computer cabinets. Powered via USB, it’s a compact, reliable solution to extend your devices’ lifespan by preventing overheating. ## Description 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 Visit the Store AIRCOM Series Visit the Store AIRPLATE Series Visit the Store AIRPLATE Series CLOUDPLATE Series Visit the Store CLOUDPLATE Series MULTIFAN Series Visit the Store MULTIFAN Series Review: Cooling my modem and router - My last cable modem up and died after just one year, I'm pretty sure because it got so hot all the time. It was a modem+router so extra hotty-hot-hotness from all the circuitry packed into one case. My son thinks this is sort of normal lifespan for routers and modems - he expects only 3 to 4 years. Well I got 8 years out of one of my last modems and 10 out of the other (same modem, WTGS54 whatever that was, it was a very good modem for its time and I got more than enough throughput from it for my needs, including streaming video, I was still running one up until 2 years ago). So *I* was shocked at its short lifespan (especially given the cost, over $200) even if he wasn't. There is just more electronics involved in these tasks, packed into less space, than the older modems. They are GOING to get hot. So in order to keep that from happening again I bought this USB fan kit, comes with 2 fans hooked together, to replace the floor fan I had aimed at the new modem and separate router. I was getting some of these anyway to put on my LED grow lights to cool them (they will ALSO last longer if you keep them cool) so I took one of those and shoved it under the router (because its a flat design, give me vertical any day) and stood the other one up next to the cable modem (which is vertical). I've got them on low and they are cooling both devices very well. On low the router gets barely slightly warm, and the better design of the vertical case for the modem leaves it totally cooled down with this little fan. If I had it to do over I'd look harder for a vertical router as well, its easier to keep them cool. AND they take up a lot less space! I've got a bunch of old computer cases with fans going to waste, I will likely make some USB fans from all those old bits and pieces, but they are likely to be a lot louder. This fan is extremely quiet even on high. I can't hear it at all on low. Also these fans in particular are optimized for humid environments so I wouldn't use anything else in my grow room. A lot of people use the other dual fan kit with the larger fans but they are using them to move air over microgreens to cut down on mold and fungi, I don't have that problem, I just need to cool the lights to improve their longevity, so I'm trying these smaller fans (take up less headroom over the lights, giving me more space under the lights because I can move them further up). I highly recommend cooling your router/modem/game console whatever electronic devices you have sitting around generating heat with some kind of fan, and these are very quiet, easy to assemble (as in plug them in), and very effective. I've seen some people insist that you shouldn't do this because it might "blow dust into the case" - where do these guys live, in the middle of death valley? LOL! Just do it. I've had a floor fan blowing across my very very ancient laptop to keep it from overheating for about 5 years now (even laptop coolers can't cool it enough) and its still going strong. I can even play (very very old) games on it still. Heat will kill your devices WAY faster than whatever tiny specks of dust these fans probably won't blow into the cases anyway. Also, if you have one of those stupid refrigerator closet things where they've built an enclosure all the way around the fridge, that is trapping heat and shortening the life of your expensive stainless steel fridge - you can use these fans to draw hot air out of that too (though I'd go with the larger version for that). Personally I'd tear that crap out but failing that, install these in a side or back wall and pull that heat out of there. Your fridge will thank you. Your bank balance will be the better for it over the long haul. Review: Almost Invisible/Stealth Quiet - Im writing this review during a very HOT unusual few June weeks in Minnesota, its been over 90 for almost 2 weeks now, I have a full size 42U server rack for my home lab, it has a big hole on top that nobody's exhaust fans fit, 21 x 5.5, but the 140mm measurements of this fan is just big enough that I can sit about 4 of them on top of the racks hole. I work in Tech Recycling, so I see what happens to most tech equipment when its removed from service, its rare to see AC Infinity products, I rescued a old AC Infinity Controller they don't appear to sell anymore, but its similar to the one they sell now, and rescued a 2U Rackmount 4 fan with controller unit, I was amazed how quiet the rack mount fan unit was even after many years of use, the LCD controller is a bit hard to read, but other then that it works fine. So I needed some USB fans to plug into the other controller I rescued, I was concerned there was only 2 USB ports, which is the same as new model they currently sell, but when these fans arrived, I saw a lovely daisy chain USB connector, apparently you can have up to 4 of these on 1 of the USB controller ports so those 2 ports give you maybe 8 fans , I don't need that much, but its a nice feature, I plugged these in to the old controller set it on AUTO and away they go. The controller appears to have Low/Med/High setting but these fans also have a 4 way switch on the cord which seems to be 1 notch higher then whats available on the controller, I have them maxed, very light hum, not much more then my laptop fans on a hot day. Compared to others, I have rescued hardwired plug and run fans with no thermostat, that sound like a bunch of servers running, so these are by far the quietest ive heard (almost can't tell they are running), Now that I know they daisy chain, I bought 2 more, with 4 of these at about $15 each vs $300-400 exhaust fans that are usually 120mm, they sell for most racks this is a great deal and larger. Perfect product, not sure how strong they are? they are not as FAT/DEEP as some Ive seen at work, its very hot, my rack runs about 3-4 degrees hotter then the room its in, so even with the fans they are having a hard time cooling it down, but air circulation is always good. its hard to get cool when the room itself is hot upper 80s, and rack is maintaining lower 90s. Only thing I would add to this product, RGB colors would be nice for those of us that like adding colors to our loved computers, but probably wastes electricity and reduces power so maybe its better they don't have color lights. (only if it don't sacrifice cooling power) CLIPS, since Im buying 4 of these to fill that big 5.5 x21 inch hole in my rack that normally a bunch of wires would go through, but in my home lab all wires go down, Im using that hole as a exhaust for the heat to exit up to the ceiling, these cool rubber feet are nice, but it would be nice to clip these together with some kind of clip so instead of 4 loose fans its 1 big fan. The feet are good, but since I have 3 cats that can jump on top of the rack it would be nice to link these fans together with some kind of bracket or clip just in case, not too worried about it, but it would be a nice modular feature. Lucky for me its only hot in Minnesota 3 months a year, so most the year these fans won't have to work hard, but they are running 24/7 now in a near 90 degree room. These would be great for quiet rooms, chances are your normal household fan is louder. Love the product, both the old ones I rescued that were not quite ready to be recycled yet, and these new fans. ## Features - 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00G05A2MU | | Air Flow Capacity | 52 Cubic Feet Per Minute | | Best Sellers Rank | #2 in Computer Case Fans | | Brand | AC Infinity | | Brand Name | AC Infinity | | Compatible Devices | Amplifier | | Cooling Method | Air | | Customer Reviews | 4.7 out of 5 stars 36,740 Reviews | | Global Trade Identification Number | 00854759004310 | | Item Dimensions L x W x H | 4.7"L x 1"W x 4.7"H | | Item Weight | 0.02 Pounds | | Manufacturer | AC Infinity | | Material Type | Rubber | | Maximum Rotational Speed | 1300 RPM | | Model | FBA_AI-MPF120A | | Noise Level | 18 Decibels | | Number of Items | 1 | | Part Number | FBA_AI-MPF120A | | Power Connector Type | USB | | Product Dimensions | 4.7"L x 1"W x 4.7"H | | UPC | 854759004310 | | Unit Count | 1.0 Count | | Voltage | 5 Volts | | Wattage | 5 watts | ## Product Details - **Brand:** AC Infinity - **Compatible Devices:** Amplifier - **Cooling Method:** Air - **Material:** Rubber - **Maximum Rotational Speed:** 1300 RPM - **Noise Level:** 18 Decibels - **Power Connector Type:** USB - **Product Dimensions:** 4.7"L x 1"W x 4.7"H - **Voltage:** 5 Volts - **Wattage:** 5 watts ## Images ![AC Infinity, MULTIFAN S3 Quiet USB Cooling Fan - Image 1](https://m.media-amazon.com/images/I/61YhqqovKjL.jpg) ![AC Infinity, MULTIFAN S3 Quiet USB Cooling Fan - Image 2](https://m.media-amazon.com/images/I/61ybuv0XHWL.jpg) ![AC Infinity, MULTIFAN S3 Quiet USB Cooling Fan - Image 3](https://m.media-amazon.com/images/I/61qt+Y2APaL.jpg) ![AC Infinity, MULTIFAN S3 Quiet USB Cooling Fan - Image 4](https://m.media-amazon.com/images/I/71zRFtXlgvL.jpg) ![AC Infinity, MULTIFAN S3 Quiet USB Cooling Fan - Image 5](https://m.media-amazon.com/images/I/61aNPrhWKbL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: What is the best position top or bottom of audio receiver? Vents are on top and bottom.** A: I would actually use 2 fans. One to push and one to pull. I used these for a Dish Network receiver which runs very hot inside the cabinet. I used one fan to blow air into the box and one fan to pull air out of cabinet. Works great. **Q: Can someone out in the community help me!...Excuse my stupidity...there are two usb plug ins..One goes to the wall usb port..how bout the other one?** A: The other port is for daisychaining them together. Like if you have 2 fans and wanted to run both through the same power supply, you'd plug one into the power supply and then the other fan through the second port on the first fan. **Q: I am thinking about buying this to cool off my PS3 original. should I get the single or dual fan?** A: Honestly I think dual fans are overkill. I'm using a single fan in my stereo cabinet with an Onkyo TX-NR737 head unit (125 watts into 7 channels, though I'm only using 3 powered by that amp) plus a Samsung UBD-M8500 Blu-ray and streaming player. That combination is easily putting out at least 500 watts (maybe more) of heat when it's running a good movie ... your PS3 doesn't do more than about 200 watts per Wikipedia. So the fact that one fan running only on medium speed, plus some decent vent holes, takes care of all the heat from my system means no way do you need 2 fans. Just make sure there's some good input/output air holes or grate or something to provide space for the air to flow through your cabinet, and a single fan should more than do the trick. **Q: What is the extension of the usb cord , is it 6ft or** A: It's about three feet, on mine. I have the AC Infinity thermostat, it has it's own power cord to the fans. On my cabinet, I have it powering three fans. It has a big Yamaha receiver and Emotive amp. and it stays nice and cool. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Cooling my modem and router *by F***S on October 31, 2022* My last cable modem up and died after just one year, I'm pretty sure because it got so hot all the time. It was a modem+router so extra hotty-hot-hotness from all the circuitry packed into one case. My son thinks this is sort of normal lifespan for routers and modems - he expects only 3 to 4 years. Well I got 8 years out of one of my last modems and 10 out of the other (same modem, WTGS54 whatever that was, it was a very good modem for its time and I got more than enough throughput from it for my needs, including streaming video, I was still running one up until 2 years ago). So *I* was shocked at its short lifespan (especially given the cost, over $200) even if he wasn't. There is just more electronics involved in these tasks, packed into less space, than the older modems. They are GOING to get hot. So in order to keep that from happening again I bought this USB fan kit, comes with 2 fans hooked together, to replace the floor fan I had aimed at the new modem and separate router. I was getting some of these anyway to put on my LED grow lights to cool them (they will ALSO last longer if you keep them cool) so I took one of those and shoved it under the router (because its a flat design, give me vertical any day) and stood the other one up next to the cable modem (which is vertical). I've got them on low and they are cooling both devices very well. On low the router gets barely slightly warm, and the better design of the vertical case for the modem leaves it totally cooled down with this little fan. If I had it to do over I'd look harder for a vertical router as well, its easier to keep them cool. AND they take up a lot less space! I've got a bunch of old computer cases with fans going to waste, I will likely make some USB fans from all those old bits and pieces, but they are likely to be a lot louder. This fan is extremely quiet even on high. I can't hear it at all on low. Also these fans in particular are optimized for humid environments so I wouldn't use anything else in my grow room. A lot of people use the other dual fan kit with the larger fans but they are using them to move air over microgreens to cut down on mold and fungi, I don't have that problem, I just need to cool the lights to improve their longevity, so I'm trying these smaller fans (take up less headroom over the lights, giving me more space under the lights because I can move them further up). I highly recommend cooling your router/modem/game console whatever electronic devices you have sitting around generating heat with some kind of fan, and these are very quiet, easy to assemble (as in plug them in), and very effective. I've seen some people insist that you shouldn't do this because it might "blow dust into the case" - where do these guys live, in the middle of death valley? LOL! Just do it. I've had a floor fan blowing across my very very ancient laptop to keep it from overheating for about 5 years now (even laptop coolers can't cool it enough) and its still going strong. I can even play (very very old) games on it still. Heat will kill your devices WAY faster than whatever tiny specks of dust these fans probably won't blow into the cases anyway. Also, if you have one of those stupid refrigerator closet things where they've built an enclosure all the way around the fridge, that is trapping heat and shortening the life of your expensive stainless steel fridge - you can use these fans to draw hot air out of that too (though I'd go with the larger version for that). Personally I'd tear that crap out but failing that, install these in a side or back wall and pull that heat out of there. Your fridge will thank you. Your bank balance will be the better for it over the long haul. ### ⭐⭐⭐⭐⭐ Almost Invisible/Stealth Quiet *by D***3 on June 9, 2021* Im writing this review during a very HOT unusual few June weeks in Minnesota, its been over 90 for almost 2 weeks now, I have a full size 42U server rack for my home lab, it has a big hole on top that nobody's exhaust fans fit, 21 x 5.5, but the 140mm measurements of this fan is just big enough that I can sit about 4 of them on top of the racks hole. I work in Tech Recycling, so I see what happens to most tech equipment when its removed from service, its rare to see AC Infinity products, I rescued a old AC Infinity Controller they don't appear to sell anymore, but its similar to the one they sell now, and rescued a 2U Rackmount 4 fan with controller unit, I was amazed how quiet the rack mount fan unit was even after many years of use, the LCD controller is a bit hard to read, but other then that it works fine. So I needed some USB fans to plug into the other controller I rescued, I was concerned there was only 2 USB ports, which is the same as new model they currently sell, but when these fans arrived, I saw a lovely daisy chain USB connector, apparently you can have up to 4 of these on 1 of the USB controller ports so those 2 ports give you maybe 8 fans , I don't need that much, but its a nice feature, I plugged these in to the old controller set it on AUTO and away they go. The controller appears to have Low/Med/High setting but these fans also have a 4 way switch on the cord which seems to be 1 notch higher then whats available on the controller, I have them maxed, very light hum, not much more then my laptop fans on a hot day. Compared to others, I have rescued hardwired plug and run fans with no thermostat, that sound like a bunch of servers running, so these are by far the quietest ive heard (almost can't tell they are running), Now that I know they daisy chain, I bought 2 more, with 4 of these at about $15 each vs $300-400 exhaust fans that are usually 120mm, they sell for most racks this is a great deal and larger. Perfect product, not sure how strong they are? they are not as FAT/DEEP as some Ive seen at work, its very hot, my rack runs about 3-4 degrees hotter then the room its in, so even with the fans they are having a hard time cooling it down, but air circulation is always good. its hard to get cool when the room itself is hot upper 80s, and rack is maintaining lower 90s. Only thing I would add to this product, RGB colors would be nice for those of us that like adding colors to our loved computers, but probably wastes electricity and reduces power so maybe its better they don't have color lights. (only if it don't sacrifice cooling power) CLIPS, since Im buying 4 of these to fill that big 5.5 x21 inch hole in my rack that normally a bunch of wires would go through, but in my home lab all wires go down, Im using that hole as a exhaust for the heat to exit up to the ceiling, these cool rubber feet are nice, but it would be nice to clip these together with some kind of clip so instead of 4 loose fans its 1 big fan. The feet are good, but since I have 3 cats that can jump on top of the rack it would be nice to link these fans together with some kind of bracket or clip just in case, not too worried about it, but it would be a nice modular feature. Lucky for me its only hot in Minnesota 3 months a year, so most the year these fans won't have to work hard, but they are running 24/7 now in a near 90 degree room. These would be great for quiet rooms, chances are your normal household fan is louder. Love the product, both the old ones I rescued that were not quite ready to be recycled yet, and these new fans. ### ⭐⭐⭐⭐⭐ not a lot of bad I can say. *by K***N on January 19, 2026* I have bought two of these now, one to cool a crt and another for a tube amp, the one being use on my crt has been running nearly 24/7 on medium for almost a year, its still going strong, no signs of it stopping any time soon. The noise level is also quite good, on low its almost inaudible, on medium it is audible but realistically you won't hear it at even a short distance (a foot or two) high however is audible and can be heard from a distance, but audible does not mean loud, its still just a mild low hum, not annoying. As for feel in the hands it does not feel cheap, the plastic housing is thick and the grills are solid metal, even the rubber feet don't feel bad. They also have the ability to daisy chain so that you don't have to use up a bunch of usb ports if you use multiple (like me.) Overall these seem to be a great product, quiet, reliable, and well built. I do have one complaint though, they don't move a lot of air, yes the fan is small but an 80mm fan can easily move more air than this, however the amount of air it can move will usually be enough to cool something, as excessive heat is normally caused by stagnant air and this fixes that even on the lowest setting (for reference my tube amp ran at roughly 130-140 degrees F and even on low it drops temps to around 100 degrees F.) If you need a fan that moves a lot of air to cool an especially hot item, this is not what you should get, look elsewhere, otherwise 5/5. ## Frequently Bought Together - AC Infinity MULTIFAN S3, Quiet 120mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling - AC Infinity MULTIFAN S7, Quiet Dual 120mm USB Fan, UL-Certified for Receiver DVR PlayStation Xbox Computer Cabinet Cooling - AC Infinity Turbo Fan Power Adapter, for MULTIFAN Series USB Fans --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/1176317-ac-infinity-multifan-s3-quiet-usb-cooling-fan](https://www.desertcart.tn/products/1176317-ac-infinity-multifan-s3-quiet-usb-cooling-fan) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-05-10*